./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w16_d8_e0.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w16_d8_e0.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba --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 64bit --witnessprinter.graph.data.programhash 49e8250576552d8e7519394e938d774c19819030f27cf18eaf3ed651941ae2a3 --- 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-b5237d8 [2022-11-22 01:47:05,369 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:47:05,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:47:05,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:47:05,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:47:05,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:47:05,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:47:05,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:47:05,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:47:05,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:47:05,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:47:05,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:47:05,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:47:05,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:47:05,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:47:05,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:47:05,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:47:05,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:47:05,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:47:05,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:47:05,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:47:05,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:47:05,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:47:05,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:47:05,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:47:05,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:47:05,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:47:05,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:47:05,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:47:05,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:47:05,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:47:05,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:47:05,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:47:05,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:47:05,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:47:05,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:47:05,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:47:05,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:47:05,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:47:05,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:47:05,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:47:05,493 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:47:05,536 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:47:05,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:47:05,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:47:05,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:47:05,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:47:05,538 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:47:05,539 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:47:05,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:47:05,539 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:47:05,539 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:47:05,540 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:47:05,541 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:47:05,541 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:47:05,541 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:47:05,542 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:47:05,542 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:47:05,542 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:47:05,542 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:47:05,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:47:05,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:47:05,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:47:05,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:47:05,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:47:05,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:47:05,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:47:05,546 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:47:05,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:47:05,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:47:05,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:47:05,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:47:05,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:47:05,548 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:47:05,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:47:05,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:47:05,549 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:47:05,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:47:05,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:47:05,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:47:05,550 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_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49e8250576552d8e7519394e938d774c19819030f27cf18eaf3ed651941ae2a3 [2022-11-22 01:47:05,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:47:05,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:47:05,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:47:05,929 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:47:05,930 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:47:05,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w16_d8_e0.c [2022-11-22 01:47:09,048 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:47:09,462 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:47:09,462 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w16_d8_e0.c [2022-11-22 01:47:09,483 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/data/51761fc95/aaeb2d26aaea4190bbd42ea426060739/FLAG39a71bfc7 [2022-11-22 01:47:09,498 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/data/51761fc95/aaeb2d26aaea4190bbd42ea426060739 [2022-11-22 01:47:09,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:47:09,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:47:09,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:47:09,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:47:09,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:47:09,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:47:09" (1/1) ... [2022-11-22 01:47:09,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b43a04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:09, skipping insertion in model container [2022-11-22 01:47:09,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:47:09" (1/1) ... [2022-11-22 01:47:09,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:47:09,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:47:09,846 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_63e0f94c-24ad-4a16-91af-aee28541c45d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w16_d8_e0.c[1164,1177] [2022-11-22 01:47:10,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:47:10,353 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:47:10,364 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_63e0f94c-24ad-4a16-91af-aee28541c45d/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n5_w16_d8_e0.c[1164,1177] [2022-11-22 01:47:10,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:47:10,572 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:47:10,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10 WrapperNode [2022-11-22 01:47:10,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:47:10,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:47:10,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:47:10,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:47:10,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,812 INFO L138 Inliner]: procedures = 12, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2559 [2022-11-22 01:47:10,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:47:10,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:47:10,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:47:10,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:47:10,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:47:10,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:47:10,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:47:10,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:47:10,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (1/1) ... [2022-11-22 01:47:10,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:47:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:10,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:47:10,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63e0f94c-24ad-4a16-91af-aee28541c45d/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:47:11,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:47:11,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:47:11,035 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:47:11,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:47:11,826 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:47:11,829 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:48:17,618 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:48:17,714 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:48:17,714 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:48:17,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:17 BoogieIcfgContainer [2022-11-22 01:48:17,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:48:17,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:48:17,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:48:17,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:48:17,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:47:09" (1/3) ... [2022-11-22 01:48:17,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a362b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:17, skipping insertion in model container [2022-11-22 01:48:17,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:10" (2/3) ... [2022-11-22 01:48:17,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a362b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:17, skipping insertion in model container [2022-11-22 01:48:17,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:17" (3/3) ... [2022-11-22 01:48:17,725 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n5_w16_d8_e0.c [2022-11-22 01:48:17,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:48:17,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:48:17,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:48:17,802 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;@5aa17a96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:48:17,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:48:17,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-22 01:48:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-22 01:48:17,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:17,818 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:48:17,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 474403943, now seen corresponding path program 1 times [2022-11-22 01:48:17,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:17,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379291271] [2022-11-22 01:48:17,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:17,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:38,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-22 01:48:56,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379291271] [2022-11-22 01:48:56,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379291271] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:48:56,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:48:56,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:48:56,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180937832] [2022-11-22 01:48:56,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:48:56,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:48:56,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:56,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:48:56,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:48:56,473 INFO L87 Difference]: Start difference. First operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-22 01:48:58,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:49:00,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:49:03,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:49:05,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-22 01:49:05,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:05,101 INFO L93 Difference]: Finished difference Result 114 states and 165 transitions. [2022-11-22 01:49:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:49:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 68 [2022-11-22 01:49:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:05,112 INFO L225 Difference]: With dead ends: 114 [2022-11-22 01:49:05,112 INFO L226 Difference]: Without dead ends: 74 [2022-11-22 01:49:05,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:49:05,123 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 18 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:05,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 183 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2022-11-22 01:49:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-22 01:49:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-22 01:49:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 32 states have call successors, (32), 1 states have call predecessors, (32), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-22 01:49:05,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-11-22 01:49:05,187 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 68 [2022-11-22 01:49:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:05,189 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-11-22 01:49:05,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-22 01:49:05,190 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-11-22 01:49:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-22 01:49:05,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:05,195 INFO L195 NwaCegarLoop]: trace histogram [32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:49:05,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:49:05,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:49:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash 119122085, now seen corresponding path program 1 times [2022-11-22 01:49:05,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:49:05,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212045794] [2022-11-22 01:49:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:05,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms