./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 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/lcm2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh --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-2329fc7 [2022-12-14 06:32:01,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:32:01,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:32:01,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:32:01,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:32:01,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:32:01,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:32:01,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:32:01,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:32:01,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:32:01,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:32:01,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:32:01,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:32:01,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:32:01,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:32:01,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:32:01,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:32:01,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:32:01,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:32:01,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:32:01,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:32:01,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:32:01,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:32:01,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:32:01,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:32:01,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:32:01,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:32:01,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:32:01,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:32:01,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:32:01,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:32:01,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:32:01,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:32:01,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:32:01,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:32:01,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:32:01,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:32:01,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:32:01,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:32:01,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:32:01,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:32:01,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:32:01,276 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:32:01,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:32:01,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:32:01,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:32:01,278 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:32:01,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:32:01,278 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:32:01,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:32:01,279 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:32:01,279 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:32:01,279 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:32:01,279 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:32:01,279 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:32:01,279 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:32:01,280 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:32:01,280 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:32:01,280 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:32:01,280 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:32:01,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:32:01,281 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:32:01,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:32:01,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:32:01,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:32:01,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:32:01,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:32:01,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:32:01,282 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:32:01,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:32:01,282 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:32:01,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:32:01,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:32:01,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:32:01,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:32:01,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:32:01,283 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:32:01,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:32:01,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:32:01,284 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:32:01,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:32:01,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:32:01,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:32:01,284 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_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0d433468442fea01fd6f51a5fcaea8db7e3b564878994442665eb482321c037 [2022-12-14 06:32:01,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:32:01,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:32:01,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:32:01,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:32:01,526 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:32:01,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench/lcm2.c [2022-12-14 06:32:04,150 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:32:04,286 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:32:04,286 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/sv-benchmarks/c/nla-digbench/lcm2.c [2022-12-14 06:32:04,291 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/data/3fbcf7f09/839e589bb54e41f8aff6709a6766e6fd/FLAG7fcc35847 [2022-12-14 06:32:04,302 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/data/3fbcf7f09/839e589bb54e41f8aff6709a6766e6fd [2022-12-14 06:32:04,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:32:04,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:32:04,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:32:04,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:32:04,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:32:04,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@384a915f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04, skipping insertion in model container [2022-12-14 06:32:04,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:32:04,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:32:04,448 WARN L237 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_075128c0-0cfb-4373-b820-620794831ea1/sv-benchmarks/c/nla-digbench/lcm2.c[537,550] [2022-12-14 06:32:04,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:32:04,471 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:32:04,481 WARN L237 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_075128c0-0cfb-4373-b820-620794831ea1/sv-benchmarks/c/nla-digbench/lcm2.c[537,550] [2022-12-14 06:32:04,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:32:04,499 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:32:04,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04 WrapperNode [2022-12-14 06:32:04,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:32:04,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:32:04,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:32:04,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:32:04,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,526 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2022-12-14 06:32:04,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:32:04,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:32:04,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:32:04,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:32:04,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,543 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:32:04,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:32:04,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:32:04,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:32:04,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (1/1) ... [2022-12-14 06:32:04,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:32:04,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:04,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:32:04,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:32:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:32:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 06:32:04,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 06:32:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:32:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:32:04,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:32:04,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 06:32:04,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 06:32:04,650 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:32:04,652 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:32:04,743 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:32:04,767 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:32:04,767 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 06:32:04,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:32:04 BoogieIcfgContainer [2022-12-14 06:32:04,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:32:04,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:32:04,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:32:04,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:32:04,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:32:04" (1/3) ... [2022-12-14 06:32:04,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b547e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:32:04, skipping insertion in model container [2022-12-14 06:32:04,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:32:04" (2/3) ... [2022-12-14 06:32:04,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b547e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:32:04, skipping insertion in model container [2022-12-14 06:32:04,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:32:04" (3/3) ... [2022-12-14 06:32:04,775 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2.c [2022-12-14 06:32:04,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:32:04,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:32:04,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:32:04,829 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;@4528154d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:32:04,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:32:04,832 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) [2022-12-14 06:32:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:32:04,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:04,838 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:32:04,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1126131708, now seen corresponding path program 1 times [2022-12-14 06:32:04,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:04,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192634166] [2022-12-14 06:32:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:04,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:04,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:32:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302237306] [2022-12-14 06:32:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:04,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:04,928 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:04,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:32:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:32:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 06:32:05,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:32:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:32:05,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:32:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:32:05,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:32:05,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192634166] [2022-12-14 06:32:05,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:32:05,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302237306] [2022-12-14 06:32:05,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302237306] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:32:05,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:32:05,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-12-14 06:32:05,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629463888] [2022-12-14 06:32:05,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:32:05,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:32:05,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:32:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:32:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:32:05,299 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) [2022-12-14 06:32:07,367 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 [] [2022-12-14 06:32:07,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:32:07,403 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2022-12-14 06:32:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:32:07,405 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 [2022-12-14 06:32:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:32:07,410 INFO L225 Difference]: With dead ends: 42 [2022-12-14 06:32:07,410 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 06:32:07,411 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 [2022-12-14 06:32:07,413 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 [2022-12-14 06:32:07,414 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] [2022-12-14 06:32:07,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 06:32:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 06:32:07,438 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) [2022-12-14 06:32:07,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-12-14 06:32:07,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-12-14 06:32:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:32:07,440 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-12-14 06:32:07,440 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) [2022-12-14 06:32:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-12-14 06:32:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 06:32:07,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:32:07,441 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] [2022-12-14 06:32:07,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:32:07,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:07,644 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:32:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:32:07,646 INFO L85 PathProgramCache]: Analyzing trace with hash 810966484, now seen corresponding path program 1 times [2022-12-14 06:32:07,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:32:07,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337816048] [2022-12-14 06:32:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:32:07,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 06:32:07,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748144646] [2022-12-14 06:32:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:32:07,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:32:07,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:32:07,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:32:07,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_075128c0-0cfb-4373-b820-620794831ea1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process