./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w8_d16_e0.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w8_d16_e0.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9 --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 31dfd3dedbb0d993bcea9c4c6b638966d245264999725303c8e6be50b23dadcc --- 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-6b4ec56 [2022-11-20 20:47:42,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:47:42,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:47:42,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:47:42,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:47:42,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:47:42,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:47:42,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:47:42,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:47:42,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:47:42,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:47:42,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:47:42,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:47:42,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:47:42,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:47:42,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:47:42,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:47:42,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:47:42,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:47:42,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:47:42,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:47:42,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:47:42,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:47:42,109 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:47:42,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:47:42,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:47:42,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:47:42,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:47:42,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:47:42,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:47:42,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:47:42,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:47:42,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:47:42,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:47:42,122 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:47:42,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:47:42,123 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:47:42,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:47:42,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:47:42,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:47:42,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:47:42,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 20:47:42,160 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:47:42,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:47:42,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:47:42,161 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:47:42,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:47:42,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:47:42,162 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:47:42,162 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:47:42,163 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:47:42,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:47:42,163 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:47:42,163 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:47:42,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:47:42,164 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:47:42,164 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:47:42,165 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:47:42,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:47:42,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:47:42,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:47:42,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:47:42,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:47:42,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:47:42,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:47:42,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:47:42,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:47:42,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:47:42,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:47:42,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:47:42,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:47:42,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:47:42,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:47:42,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:47:42,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:47:42,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:47:42,171 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:47:42,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:47:42,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:47:42,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:47:42,172 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_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31dfd3dedbb0d993bcea9c4c6b638966d245264999725303c8e6be50b23dadcc [2022-11-20 20:47:42,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:47:42,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:47:42,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:47:42,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:47:42,466 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:47:42,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w8_d16_e0.c [2022-11-20 20:47:45,559 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:47:46,025 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:47:46,026 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w8_d16_e0.c [2022-11-20 20:47:46,052 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/data/c7f55a36f/8a7980055c7c41ddac29838358d2eb56/FLAG3f9f10454 [2022-11-20 20:47:46,075 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/data/c7f55a36f/8a7980055c7c41ddac29838358d2eb56 [2022-11-20 20:47:46,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:47:46,082 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:47:46,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:47:46,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:47:46,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:47:46,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:47:46" (1/1) ... [2022-11-20 20:47:46,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6417eacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:46, skipping insertion in model container [2022-11-20 20:47:46,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:47:46" (1/1) ... [2022-11-20 20:47:46,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:47:46,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:47:46,384 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_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w8_d16_e0.c[1110,1123] [2022-11-20 20:47:46,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:47:46,959 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:47:46,976 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_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.arbitrated_top_n4_w8_d16_e0.c[1110,1123] [2022-11-20 20:47:47,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:47:47,183 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:47:47,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47 WrapperNode [2022-11-20 20:47:47,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:47:47,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:47:47,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:47:47,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:47:47,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,449 INFO L138 Inliner]: procedures = 11, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2884 [2022-11-20 20:47:47,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:47:47,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:47:47,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:47:47,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:47:47,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,525 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,544 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:47:47,580 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:47:47,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:47:47,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:47:47,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (1/1) ... [2022-11-20 20:47:47,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:47:47,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:47:47,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:47:47,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_005a53dc-a7cc-47ad-aa2f-b4f9dff4d3cd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:47:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:47:47,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:47:47,658 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 20:47:47,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 20:47:48,311 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:47:48,313 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:49:14,425 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:49:14,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:49:14,547 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 20:49:14,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:49:14 BoogieIcfgContainer [2022-11-20 20:49:14,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:49:14,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:49:14,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:49:14,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:49:14,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:47:46" (1/3) ... [2022-11-20 20:49:14,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca68be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:49:14, skipping insertion in model container [2022-11-20 20:49:14,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:47:47" (2/3) ... [2022-11-20 20:49:14,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca68be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:49:14, skipping insertion in model container [2022-11-20 20:49:14,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:49:14" (3/3) ... [2022-11-20 20:49:14,572 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.arbitrated_top_n4_w8_d16_e0.c [2022-11-20 20:49:14,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:49:14,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:49:14,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:49:14,707 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;@416c7977, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:49:14,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:49:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 20:49:14,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 20:49:14,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:14,722 INFO L195 NwaCegarLoop]: trace histogram [13, 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] [2022-11-20 20:49:14,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:49:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:14,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1240867872, now seen corresponding path program 1 times [2022-11-20 20:49:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:49:14,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47802671] [2022-11-20 20:49:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:49:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:49:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-11-20 20:49:47,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:49:47,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47802671] [2022-11-20 20:49:47,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47802671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:49:47,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:49:47,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:49:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464010115] [2022-11-20 20:49:47,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:49:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:49:47,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:49:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:49:47,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:49:47,572 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-20 20:49:49,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:49:52,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:49:54,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:49:56,184 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 [] [2022-11-20 20:49:56,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:49:56,210 INFO L93 Difference]: Finished difference Result 96 states and 138 transitions. [2022-11-20 20:49:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:49:56,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 56 [2022-11-20 20:49:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:49:56,222 INFO L225 Difference]: With dead ends: 96 [2022-11-20 20:49:56,223 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 20:49:56,229 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 [2022-11-20 20:49:56,236 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 15 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:49:56,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 150 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 4 Unknown, 0 Unchecked, 8.6s Time] [2022-11-20 20:49:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 20:49:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-20 20:49:56,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-20 20:49:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2022-11-20 20:49:56,305 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 56 [2022-11-20 20:49:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:49:56,307 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2022-11-20 20:49:56,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2022-11-20 20:49:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2022-11-20 20:49:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-20 20:49:56,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:49:56,317 INFO L195 NwaCegarLoop]: trace histogram [26, 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] [2022-11-20 20:49:56,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:49:56,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:49:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:49:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2096659449, now seen corresponding path program 1 times [2022-11-20 20:49:56,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:49:56,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857185425] [2022-11-20 20:49:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:49:56,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms