./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW --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 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 --- 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-4e7fbc6 [2022-11-23 13:52:19,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:52:19,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:52:19,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:52:19,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:52:19,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:52:19,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:52:19,517 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:52:19,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:52:19,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:52:19,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:52:19,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:52:19,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:52:19,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:52:19,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:52:19,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:52:19,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:52:19,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:52:19,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:52:19,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:52:19,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:52:19,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:52:19,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:52:19,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:52:19,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:52:19,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:52:19,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:52:19,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:52:19,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:52:19,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:52:19,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:52:19,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:52:19,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:52:19,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:52:19,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:52:19,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:52:19,552 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:52:19,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:52:19,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:52:19,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:52:19,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:52:19,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 13:52:19,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:52:19,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:52:19,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:52:19,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:52:19,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:52:19,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:52:19,599 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:52:19,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:52:19,600 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:52:19,600 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:52:19,602 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:52:19,602 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:52:19,602 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:52:19,603 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:52:19,603 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:52:19,603 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:52:19,604 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:52:19,604 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:52:19,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:52:19,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:52:19,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:52:19,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:52:19,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:52:19,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:52:19,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:52:19,607 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:52:19,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:52:19,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:52:19,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:52:19,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:52:19,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:52:19,609 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:52:19,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:52:19,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:52:19,610 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:52:19,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:52:19,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:52:19,611 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:52:19,612 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_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2022-11-23 13:52:19,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:52:20,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:52:20,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:52:20,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:52:20,022 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:52:20,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2022-11-23 13:52:23,118 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:52:23,722 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:52:23,722 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2022-11-23 13:52:23,764 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/data/47bd7ce8b/b91ce6a492844b7f8d1471bf644c5f31/FLAGdb8cdd1b7 [2022-11-23 13:52:23,787 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/data/47bd7ce8b/b91ce6a492844b7f8d1471bf644c5f31 [2022-11-23 13:52:23,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:52:23,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:52:23,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:23,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:52:23,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:52:23,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:23" (1/1) ... [2022-11-23 13:52:23,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cb39cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:23, skipping insertion in model container [2022-11-23 13:52:23,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:52:23" (1/1) ... [2022-11-23 13:52:23,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:52:23,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:52:25,626 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_a456e875-c977-4f84-aa20-118ed7a8b225/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2022-11-23 13:52:25,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:25,735 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:52:26,072 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_a456e875-c977-4f84-aa20-118ed7a8b225/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2022-11-23 13:52:26,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:52:26,279 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:52:26,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26 WrapperNode [2022-11-23 13:52:26,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:52:26,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:52:26,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:52:26,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:52:26,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,466 INFO L138 Inliner]: procedures = 176, calls = 1205, calls flagged for inlining = 84, calls inlined = 81, statements flattened = 2572 [2022-11-23 13:52:26,466 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:52:26,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:52:26,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:52:26,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:52:26,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,588 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:52:26,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:52:26,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:52:26,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:52:26,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (1/1) ... [2022-11-23 13:52:26,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:52:26,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:52:26,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:52:26,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a456e875-c977-4f84-aa20-118ed7a8b225/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:52:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2022-11-23 13:52:26,757 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2022-11-23 13:52:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 13:52:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 13:52:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:52:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 13:52:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 13:52:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-23 13:52:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-23 13:52:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-23 13:52:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-23 13:52:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 13:52:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 13:52:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-23 13:52:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-23 13:52:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 13:52:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 13:52:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-23 13:52:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-23 13:52:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-23 13:52:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-23 13:52:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 13:52:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 13:52:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:52:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2022-11-23 13:52:26,768 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2022-11-23 13:52:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 13:52:26,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 13:52:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 13:52:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 13:52:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 13:52:26,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 13:52:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 13:52:26,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 13:52:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 13:52:26,771 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 13:52:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:52:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2022-11-23 13:52:26,772 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2022-11-23 13:52:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:52:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-23 13:52:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-23 13:52:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2022-11-23 13:52:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2022-11-23 13:52:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:52:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 13:52:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2022-11-23 13:52:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2022-11-23 13:52:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2022-11-23 13:52:26,775 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2022-11-23 13:52:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-11-23 13:52:26,775 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-11-23 13:52:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 13:52:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-23 13:52:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-23 13:52:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-23 13:52:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-23 13:52:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2022-11-23 13:52:26,789 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2022-11-23 13:52:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2022-11-23 13:52:26,790 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2022-11-23 13:52:26,790 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2022-11-23 13:52:26,791 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2022-11-23 13:52:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-23 13:52:26,791 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-23 13:52:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-23 13:52:26,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-23 13:52:26,791 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2022-11-23 13:52:26,792 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2022-11-23 13:52:26,792 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 13:52:26,792 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 13:52:26,793 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2022-11-23 13:52:26,793 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2022-11-23 13:52:26,793 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2022-11-23 13:52:26,794 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2022-11-23 13:52:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:52:26,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 13:52:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2022-11-23 13:52:26,795 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2022-11-23 13:52:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-23 13:52:26,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-23 13:52:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-23 13:52:26,796 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-23 13:52:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-23 13:52:26,796 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-23 13:52:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-23 13:52:26,797 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-23 13:52:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 13:52:26,797 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 13:52:26,797 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-23 13:52:26,797 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-23 13:52:26,798 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 13:52:26,798 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 13:52:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2022-11-23 13:52:26,799 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2022-11-23 13:52:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:52:26,799 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2022-11-23 13:52:26,799 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2022-11-23 13:52:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:52:26,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:52:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2022-11-23 13:52:26,800 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2022-11-23 13:52:27,470 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:52:27,473 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:52:28,141 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 13:52:34,536 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:52:35,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:52:35,262 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 13:52:35,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:35 BoogieIcfgContainer [2022-11-23 13:52:35,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:52:35,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:52:35,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:52:35,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:52:35,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:52:23" (1/3) ... [2022-11-23 13:52:35,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6106fb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:35, skipping insertion in model container [2022-11-23 13:52:35,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:52:26" (2/3) ... [2022-11-23 13:52:35,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6106fb3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:52:35, skipping insertion in model container [2022-11-23 13:52:35,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:52:35" (3/3) ... [2022-11-23 13:52:35,287 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2022-11-23 13:52:35,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:52:35,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:52:35,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:52:35,420 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;@38d102ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:52:35,420 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:52:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand has 677 states, 394 states have (on average 1.3959390862944163) internal successors, (550), 432 states have internal predecessors, (550), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-23 13:52:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-23 13:52:35,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:35,478 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 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, 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] [2022-11-23 13:52:35,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:35,486 INFO L85 PathProgramCache]: Analyzing trace with hash 955712433, now seen corresponding path program 1 times [2022-11-23 13:52:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:35,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985859811] [2022-11-23 13:52:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:35,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-23 13:52:36,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:36,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985859811] [2022-11-23 13:52:36,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985859811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:36,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:36,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:52:36,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876695778] [2022-11-23 13:52:36,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:36,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:52:36,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:36,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:52:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:36,969 INFO L87 Difference]: Start difference. First operand has 677 states, 394 states have (on average 1.3959390862944163) internal successors, (550), 432 states have internal predecessors, (550), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:52:39,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:52:41,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:52:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:43,771 INFO L93 Difference]: Finished difference Result 2579 states and 3901 transitions. [2022-11-23 13:52:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:52:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 147 [2022-11-23 13:52:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:43,804 INFO L225 Difference]: With dead ends: 2579 [2022-11-23 13:52:43,804 INFO L226 Difference]: Without dead ends: 1878 [2022-11-23 13:52:43,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:43,818 INFO L413 NwaCegarLoop]: 1411 mSDtfsCounter, 1845 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:43,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1845 Valid, 3429 Invalid, 812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 804 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-23 13:52:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-23 13:52:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1864. [2022-11-23 13:52:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1089 states have (on average 1.3682277318640954) internal successors, (1490), 1175 states have internal predecessors, (1490), 651 states have call successors, (651), 124 states have call predecessors, (651), 123 states have return successors, (650), 623 states have call predecessors, (650), 650 states have call successors, (650) [2022-11-23 13:52:44,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2791 transitions. [2022-11-23 13:52:44,032 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2791 transitions. Word has length 147 [2022-11-23 13:52:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:44,044 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 2791 transitions. [2022-11-23 13:52:44,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:52:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2791 transitions. [2022-11-23 13:52:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-23 13:52:44,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:44,059 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 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, 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] [2022-11-23 13:52:44,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:52:44,060 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash -809927671, now seen corresponding path program 1 times [2022-11-23 13:52:44,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:44,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435974203] [2022-11-23 13:52:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:44,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-23 13:52:44,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:44,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435974203] [2022-11-23 13:52:44,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435974203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:44,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:44,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:52:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731569416] [2022-11-23 13:52:44,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:44,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:52:44,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:44,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:52:44,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:44,720 INFO L87 Difference]: Start difference. First operand 1864 states and 2791 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:52:46,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:52:48,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:52:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:52:51,686 INFO L93 Difference]: Finished difference Result 7326 states and 10966 transitions. [2022-11-23 13:52:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:52:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 149 [2022-11-23 13:52:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:52:51,723 INFO L225 Difference]: With dead ends: 7326 [2022-11-23 13:52:51,724 INFO L226 Difference]: Without dead ends: 5474 [2022-11-23 13:52:51,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:51,736 INFO L413 NwaCegarLoop]: 1415 mSDtfsCounter, 1799 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 3590 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:52:51,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 3590 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 827 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-23 13:52:51,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2022-11-23 13:52:52,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 5460. [2022-11-23 13:52:52,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 3189 states have (on average 1.3659454374412041) internal successors, (4356), 3439 states have internal predecessors, (4356), 1907 states have call successors, (1907), 364 states have call predecessors, (1907), 363 states have return successors, (1906), 1829 states have call predecessors, (1906), 1906 states have call successors, (1906) [2022-11-23 13:52:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 8169 transitions. [2022-11-23 13:52:52,261 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 8169 transitions. Word has length 149 [2022-11-23 13:52:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:52:52,261 INFO L495 AbstractCegarLoop]: Abstraction has 5460 states and 8169 transitions. [2022-11-23 13:52:52,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:52:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 8169 transitions. [2022-11-23 13:52:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-23 13:52:52,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:52:52,275 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 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, 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] [2022-11-23 13:52:52,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:52:52,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:52:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:52:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1427278482, now seen corresponding path program 1 times [2022-11-23 13:52:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:52:52,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920132339] [2022-11-23 13:52:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:52:52,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:52:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:52:52,919 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-23 13:52:52,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:52:52,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920132339] [2022-11-23 13:52:52,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920132339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:52:52,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:52:52,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:52:52,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743750079] [2022-11-23 13:52:52,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:52:52,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:52:52,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:52:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:52:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:52:52,932 INFO L87 Difference]: Start difference. First operand 5460 states and 8169 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:52:54,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:52:57,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:00,733 INFO L93 Difference]: Finished difference Result 21698 states and 32454 transitions. [2022-11-23 13:53:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:53:00,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 150 [2022-11-23 13:53:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:00,841 INFO L225 Difference]: With dead ends: 21698 [2022-11-23 13:53:00,841 INFO L226 Difference]: Without dead ends: 16250 [2022-11-23 13:53:00,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:53:00,874 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 2246 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 418 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2246 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:00,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2246 Valid, 2705 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 725 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 13:53:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16250 states. [2022-11-23 13:53:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16250 to 16218. [2022-11-23 13:53:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16218 states, 9471 states have (on average 1.3624749234505331) internal successors, (12904), 10201 states have internal predecessors, (12904), 5663 states have call successors, (5663), 1084 states have call predecessors, (5663), 1083 states have return successors, (5662), 5447 states have call predecessors, (5662), 5662 states have call successors, (5662) [2022-11-23 13:53:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16218 states to 16218 states and 24229 transitions. [2022-11-23 13:53:02,252 INFO L78 Accepts]: Start accepts. Automaton has 16218 states and 24229 transitions. Word has length 150 [2022-11-23 13:53:02,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:02,253 INFO L495 AbstractCegarLoop]: Abstraction has 16218 states and 24229 transitions. [2022-11-23 13:53:02,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:53:02,254 INFO L276 IsEmpty]: Start isEmpty. Operand 16218 states and 24229 transitions. [2022-11-23 13:53:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-23 13:53:02,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:02,272 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 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, 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] [2022-11-23 13:53:02,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:53:02,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1612809862, now seen corresponding path program 1 times [2022-11-23 13:53:02,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:02,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743954175] [2022-11-23 13:53:02,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:02,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-23 13:53:02,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743954175] [2022-11-23 13:53:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743954175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:02,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:02,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:53:02,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666067511] [2022-11-23 13:53:02,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:02,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:53:02,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:53:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:53:02,878 INFO L87 Difference]: Start difference. First operand 16218 states and 24229 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:53:04,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:07,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:11,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:11,412 INFO L93 Difference]: Finished difference Result 62102 states and 92590 transitions. [2022-11-23 13:53:11,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:53:11,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 148 [2022-11-23 13:53:11,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:11,693 INFO L225 Difference]: With dead ends: 62102 [2022-11-23 13:53:11,694 INFO L226 Difference]: Without dead ends: 45896 [2022-11-23 13:53:11,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:53:11,779 INFO L413 NwaCegarLoop]: 1662 mSDtfsCounter, 2145 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 363 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:11,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2145 Valid, 2948 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 777 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 13:53:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45896 states. [2022-11-23 13:53:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45896 to 45882. [2022-11-23 13:53:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45882 states, 26879 states have (on average 1.3601696491684958) internal successors, (36560), 28773 states have internal predecessors, (36560), 15871 states have call successors, (15871), 3132 states have call predecessors, (15871), 3131 states have return successors, (15870), 15309 states have call predecessors, (15870), 15870 states have call successors, (15870) [2022-11-23 13:53:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45882 states to 45882 states and 68301 transitions. [2022-11-23 13:53:15,524 INFO L78 Accepts]: Start accepts. Automaton has 45882 states and 68301 transitions. Word has length 148 [2022-11-23 13:53:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:15,524 INFO L495 AbstractCegarLoop]: Abstraction has 45882 states and 68301 transitions. [2022-11-23 13:53:15,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 13:53:15,526 INFO L276 IsEmpty]: Start isEmpty. Operand 45882 states and 68301 transitions. [2022-11-23 13:53:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-23 13:53:15,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:15,580 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:53:15,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:53:15,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1745598883, now seen corresponding path program 1 times [2022-11-23 13:53:15,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:15,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407019524] [2022-11-23 13:53:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-23 13:53:16,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407019524] [2022-11-23 13:53:16,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407019524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:16,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:16,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:53:16,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143458218] [2022-11-23 13:53:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:16,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:16,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:16,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:16,372 INFO L87 Difference]: Start difference. First operand 45882 states and 68301 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 13:53:18,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:20,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:24,691 INFO L93 Difference]: Finished difference Result 134095 states and 199940 transitions. [2022-11-23 13:53:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:24,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 183 [2022-11-23 13:53:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:25,238 INFO L225 Difference]: With dead ends: 134095 [2022-11-23 13:53:25,238 INFO L226 Difference]: Without dead ends: 88225 [2022-11-23 13:53:25,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:25,415 INFO L413 NwaCegarLoop]: 1240 mSDtfsCounter, 841 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:25,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 2120 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 13:53:25,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88225 states. [2022-11-23 13:53:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88225 to 88222. [2022-11-23 13:53:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88222 states, 51452 states have (on average 1.3587226929954133) internal successors, (69909), 55160 states have internal predecessors, (69909), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2022-11-23 13:53:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88222 states to 88222 states and 131574 transitions. [2022-11-23 13:53:31,531 INFO L78 Accepts]: Start accepts. Automaton has 88222 states and 131574 transitions. Word has length 183 [2022-11-23 13:53:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:31,532 INFO L495 AbstractCegarLoop]: Abstraction has 88222 states and 131574 transitions. [2022-11-23 13:53:31,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 13:53:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 88222 states and 131574 transitions. [2022-11-23 13:53:31,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-23 13:53:31,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:31,665 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 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, 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, 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] [2022-11-23 13:53:31,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:53:31,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1449106372, now seen corresponding path program 1 times [2022-11-23 13:53:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:31,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227732891] [2022-11-23 13:53:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:31,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-23 13:53:32,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:32,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227732891] [2022-11-23 13:53:32,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227732891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:32,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:32,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:53:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975797197] [2022-11-23 13:53:32,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:32,581 INFO L87 Difference]: Start difference. First operand 88222 states and 131574 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 13:53:34,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:37,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:40,975 INFO L93 Difference]: Finished difference Result 112909 states and 169599 transitions. [2022-11-23 13:53:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:40,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 205 [2022-11-23 13:53:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:41,608 INFO L225 Difference]: With dead ends: 112909 [2022-11-23 13:53:41,608 INFO L226 Difference]: Without dead ends: 94714 [2022-11-23 13:53:41,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:41,705 INFO L413 NwaCegarLoop]: 1231 mSDtfsCounter, 273 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:41,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 2180 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2022-11-23 13:53:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94714 states. [2022-11-23 13:53:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94714 to 88224. [2022-11-23 13:53:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88224 states, 51454 states have (on average 1.3587087495627161) internal successors, (69911), 55162 states have internal predecessors, (69911), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2022-11-23 13:53:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88224 states to 88224 states and 131576 transitions. [2022-11-23 13:53:47,002 INFO L78 Accepts]: Start accepts. Automaton has 88224 states and 131576 transitions. Word has length 205 [2022-11-23 13:53:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:53:47,004 INFO L495 AbstractCegarLoop]: Abstraction has 88224 states and 131576 transitions. [2022-11-23 13:53:47,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 13:53:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 88224 states and 131576 transitions. [2022-11-23 13:53:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-23 13:53:47,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:53:47,522 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 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, 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, 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] [2022-11-23 13:53:47,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:53:47,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:53:47,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:53:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash -92017606, now seen corresponding path program 1 times [2022-11-23 13:53:47,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:53:47,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801517595] [2022-11-23 13:53:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:53:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:53:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:53:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-23 13:53:48,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:48,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801517595] [2022-11-23 13:53:48,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801517595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:48,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:53:48,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:53:48,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190606942] [2022-11-23 13:53:48,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:48,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:53:48,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:48,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:53:48,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:48,120 INFO L87 Difference]: Start difference. First operand 88224 states and 131576 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 13:53:50,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:52,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:53:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:53:56,329 INFO L93 Difference]: Finished difference Result 112894 states and 169571 transitions. [2022-11-23 13:53:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:53:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 207 [2022-11-23 13:53:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:53:56,825 INFO L225 Difference]: With dead ends: 112894 [2022-11-23 13:53:56,826 INFO L226 Difference]: Without dead ends: 94697 [2022-11-23 13:53:56,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:53:56,919 INFO L413 NwaCegarLoop]: 1226 mSDtfsCounter, 256 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:53:56,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 2164 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 13:53:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94697 states. [2022-11-23 13:54:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94697 to 88227. [2022-11-23 13:54:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88227 states, 51457 states have (on average 1.3586878364459647) internal successors, (69914), 55165 states have internal predecessors, (69914), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2022-11-23 13:54:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88227 states to 88227 states and 131579 transitions. [2022-11-23 13:54:01,892 INFO L78 Accepts]: Start accepts. Automaton has 88227 states and 131579 transitions. Word has length 207 [2022-11-23 13:54:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:01,893 INFO L495 AbstractCegarLoop]: Abstraction has 88227 states and 131579 transitions. [2022-11-23 13:54:01,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 13:54:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 88227 states and 131579 transitions. [2022-11-23 13:54:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-23 13:54:01,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:01,968 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 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, 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, 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] [2022-11-23 13:54:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:54:01,969 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1739503374, now seen corresponding path program 1 times [2022-11-23 13:54:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:01,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550188597] [2022-11-23 13:54:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:01,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat