./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 de31baf8eaedf539d65fb5721be2af240d36dbb7878bb607202c3f42318b80db --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:43:25,009 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:43:25,072 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:43:25,078 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:43:25,078 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:43:25,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:43:25,104 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:43:25,104 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:43:25,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:43:25,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:43:25,106 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:43:25,107 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:43:25,107 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:43:25,107 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:43:25,108 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:43:25,108 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:43:25,109 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:43:25,109 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:43:25,110 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:43:25,110 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:43:25,111 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:43:25,116 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:43:25,117 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:43:25,117 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:43:25,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:43:25,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:43:25,118 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:43:25,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:43:25,119 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:43:25,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:43:25,120 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:43:25,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:43:25,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:43:25,121 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:43:25,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:43:25,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:43:25,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:43:25,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:43:25,122 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:43:25,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:43:25,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:43:25,123 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:43:25,123 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:43:25,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:43:25,123 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de31baf8eaedf539d65fb5721be2af240d36dbb7878bb607202c3f42318b80db [2023-12-02 17:43:25,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:43:25,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:43:25,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:43:25,358 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:43:25,358 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:43:25,359 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c [2023-12-02 17:43:28,033 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:43:28,487 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:43:28,488 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c [2023-12-02 17:43:28,521 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/data/047151ce8/8839264c68754bc4b98d23aee5b03d47/FLAGc957d2db2 [2023-12-02 17:43:28,536 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/data/047151ce8/8839264c68754bc4b98d23aee5b03d47 [2023-12-02 17:43:28,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:43:28,540 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:43:28,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:43:28,541 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:43:28,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:43:28,546 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:43:28" (1/1) ... [2023-12-02 17:43:28,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f59deee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:28, skipping insertion in model container [2023-12-02 17:43:28,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:43:28" (1/1) ... [2023-12-02 17:43:28,690 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:43:28,932 WARN L240 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_ab63c4f5-bf07-46de-8c33-73e271caac61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c[1326,1339] [2023-12-02 17:43:29,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:43:29,779 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:43:29,791 WARN L240 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_ab63c4f5-bf07-46de-8c33-73e271caac61/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c[1326,1339] [2023-12-02 17:43:30,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:43:30,319 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:43:30,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30 WrapperNode [2023-12-02 17:43:30,320 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:43:30,321 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:43:30,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:43:30,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:43:30,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:30,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:31,853 INFO L138 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21451 [2023-12-02 17:43:31,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:43:31,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:43:31,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:43:31,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:43:31,861 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:31,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,427 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,810 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:43:32,811 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:43:32,811 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:43:32,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:43:32,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (1/1) ... [2023-12-02 17:43:32,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:43:32,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:43:32,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:43:32,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab63c4f5-bf07-46de-8c33-73e271caac61/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:43:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:43:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 17:43:32,877 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 17:43:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:43:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:43:32,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:43:34,254 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:43:34,257 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:43:45,986 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:44:16,978 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:44:16,979 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 17:44:16,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:44:16 BoogieIcfgContainer [2023-12-02 17:44:16,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:44:16,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:44:16,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:44:16,986 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:44:16,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:43:28" (1/3) ... [2023-12-02 17:44:16,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eed1af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:44:16, skipping insertion in model container [2023-12-02 17:44:16,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:43:30" (2/3) ... [2023-12-02 17:44:16,987 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eed1af2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:44:16, skipping insertion in model container [2023-12-02 17:44:16,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:44:16" (3/3) ... [2023-12-02 17:44:16,988 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n2_w64_d128_e0.c [2023-12-02 17:44:17,008 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:44:17,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:44:17,059 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:44:17,066 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=LoopHeads, 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;@70b65fae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:44:17,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:44:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 17:44:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 17:44:17,076 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:44:17,077 INFO L195 NwaCegarLoop]: trace histogram [7, 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] [2023-12-02 17:44:17,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:44:17,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:44:17,083 INFO L85 PathProgramCache]: Analyzing trace with hash -938746118, now seen corresponding path program 1 times [2023-12-02 17:44:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:44:17,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592638000] [2023-12-02 17:44:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:44:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:47:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:48:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-12-02 17:48:07,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:48:07,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592638000] [2023-12-02 17:48:07,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592638000] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:48:07,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:48:07,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:48:07,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809188970] [2023-12-02 17:48:07,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:48:07,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:48:07,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:48:07,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:48:07,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:48:07,625 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 17:48:09,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:12,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:15,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:17,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:19,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:21,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:23,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:25,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:28,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:30,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:32,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 17:48:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:48:32,440 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2023-12-02 17:48:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:48:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 32 [2023-12-02 17:48:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:48:32,524 INFO L225 Difference]: With dead ends: 61 [2023-12-02 17:48:32,524 INFO L226 Difference]: Without dead ends: 39 [2023-12-02 17:48:32,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:48:32,530 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:48:32,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 48 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 11 Unknown, 0 Unchecked, 24.7s Time] [2023-12-02 17:48:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-02 17:48:32,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-12-02 17:48:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 17:48:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2023-12-02 17:48:32,567 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 32 [2023-12-02 17:48:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:48:32,568 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2023-12-02 17:48:32,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-12-02 17:48:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2023-12-02 17:48:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 17:48:32,572 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:48:32,572 INFO L195 NwaCegarLoop]: trace histogram [14, 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] [2023-12-02 17:48:32,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:48:32,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:48:32,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:48:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 83263713, now seen corresponding path program 1 times [2023-12-02 17:48:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:48:32,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135415209] [2023-12-02 17:48:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:48:32,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms