./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--tty--n_r3964.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS --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 91e04004830698389104523fd95ec19013bffc6ed609cfb90049e6e93edb2bb3 --- 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-8393723 [2022-11-19 07:56:17,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:56:18,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:56:18,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:56:18,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:56:18,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:56:18,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:56:18,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:56:18,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:56:18,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:56:18,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:56:18,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:56:18,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:56:18,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:56:18,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:56:18,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:56:18,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:56:18,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:56:18,100 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:56:18,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:56:18,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:56:18,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:56:18,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:56:18,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:56:18,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:56:18,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:56:18,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:56:18,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:56:18,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:56:18,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:56:18,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:56:18,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:56:18,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:56:18,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:56:18,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:56:18,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:56:18,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:56:18,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:56:18,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:56:18,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:56:18,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:56:18,139 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:56:18,188 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:56:18,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:56:18,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:56:18,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:56:18,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:56:18,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:56:18,192 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:56:18,192 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:56:18,193 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:56:18,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:56:18,194 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:56:18,195 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:56:18,195 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:56:18,195 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:56:18,195 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:56:18,196 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:56:18,196 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:56:18,196 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:56:18,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:56:18,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:56:18,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:56:18,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:56:18,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:56:18,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:56:18,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:56:18,199 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:56:18,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:56:18,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:56:18,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:56:18,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:18,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:56:18,201 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:56:18,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:56:18,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:56:18,202 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:56:18,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:56:18,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:56:18,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:56:18,203 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_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91e04004830698389104523fd95ec19013bffc6ed609cfb90049e6e93edb2bb3 [2022-11-19 07:56:18,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:56:18,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:56:18,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:56:18,603 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:56:18,604 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:56:18,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i [2022-11-19 07:56:18,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/data/be9777343/2fa6d6f0ab804ddf944c5d3712afa018/FLAG05a42c13c [2022-11-19 07:56:19,668 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:56:19,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i [2022-11-19 07:56:19,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/data/be9777343/2fa6d6f0ab804ddf944c5d3712afa018/FLAG05a42c13c [2022-11-19 07:56:20,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/data/be9777343/2fa6d6f0ab804ddf944c5d3712afa018 [2022-11-19 07:56:20,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:56:20,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:56:20,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:20,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:56:20,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:56:20,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:20" (1/1) ... [2022-11-19 07:56:20,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df07edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:20, skipping insertion in model container [2022-11-19 07:56:20,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:56:20" (1/1) ... [2022-11-19 07:56:20,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:56:20,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:56:21,564 WARN L234 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_71ccbc45-9e5f-4dfd-9317-57cb1487612e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i[143316,143329] [2022-11-19 07:56:21,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:21,623 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:56:22,080 WARN L234 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_71ccbc45-9e5f-4dfd-9317-57cb1487612e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i[143316,143329] [2022-11-19 07:56:22,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:56:22,192 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:56:22,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22 WrapperNode [2022-11-19 07:56:22,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:56:22,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:22,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:56:22,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:56:22,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,388 INFO L138 Inliner]: procedures = 142, calls = 664, calls flagged for inlining = 62, calls inlined = 59, statements flattened = 1984 [2022-11-19 07:56:22,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:56:22,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:56:22,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:56:22,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:56:22,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,499 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:56:22,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:56:22,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:56:22,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:56:22,539 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (1/1) ... [2022-11-19 07:56:22,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:56:22,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:22,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:56:22,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71ccbc45-9e5f-4dfd-9317-57cb1487612e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:56:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 07:56:22,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 07:56:22,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:56:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2022-11-19 07:56:22,638 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2022-11-19 07:56:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:56:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:56:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:56:22,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:56:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:56:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:56:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:56:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-19 07:56:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-19 07:56:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure retry_transmit [2022-11-19 07:56:22,641 INFO L138 BoogieDeclarations]: Found implementation of procedure retry_transmit [2022-11-19 07:56:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:56:22,641 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:56:22,641 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-19 07:56:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-19 07:56:22,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-19 07:56:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-19 07:56:22,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:56:22,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:56:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_close [2022-11-19 07:56:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_close [2022-11-19 07:56:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure remove_msg [2022-11-19 07:56:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_msg [2022-11-19 07:56:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-19 07:56:22,645 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-19 07:56:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure task_pid [2022-11-19 07:56:22,645 INFO L138 BoogieDeclarations]: Found implementation of procedure task_pid [2022-11-19 07:56:22,645 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:56:22,646 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:56:22,646 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unlock [2022-11-19 07:56:22,646 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unlock [2022-11-19 07:56:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:56:22,647 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-19 07:56:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-19 07:56:22,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:56:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:56:22,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 07:56:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 07:56:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:56:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:56:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure add_msg [2022-11-19 07:56:22,650 INFO L138 BoogieDeclarations]: Found implementation of procedure add_msg [2022-11-19 07:56:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:56:22,651 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2022-11-19 07:56:22,652 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2022-11-19 07:56:22,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 07:56:22,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 07:56:22,654 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 07:56:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 07:56:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_poll [2022-11-19 07:56:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_poll [2022-11-19 07:56:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:56:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-19 07:56:22,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-19 07:56:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:56:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:56:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:56:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure findClient [2022-11-19 07:56:22,658 INFO L138 BoogieDeclarations]: Found implementation of procedure findClient [2022-11-19 07:56:22,658 INFO L130 BoogieDeclarations]: Found specification of procedure put_char [2022-11-19 07:56:22,658 INFO L138 BoogieDeclarations]: Found implementation of procedure put_char [2022-11-19 07:56:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:56:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-19 07:56:22,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-19 07:56:22,659 INFO L130 BoogieDeclarations]: Found specification of procedure put_pid [2022-11-19 07:56:22,660 INFO L138 BoogieDeclarations]: Found implementation of procedure put_pid [2022-11-19 07:56:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-19 07:56:22,660 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-19 07:56:22,660 INFO L130 BoogieDeclarations]: Found specification of procedure remove_client_block [2022-11-19 07:56:22,660 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_client_block [2022-11-19 07:56:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 07:56:22,661 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 07:56:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:56:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:56:22,661 INFO L130 BoogieDeclarations]: Found specification of procedure on_receive_block [2022-11-19 07:56:22,662 INFO L138 BoogieDeclarations]: Found implementation of procedure on_receive_block [2022-11-19 07:56:22,662 INFO L130 BoogieDeclarations]: Found specification of procedure flush [2022-11-19 07:56:22,663 INFO L138 BoogieDeclarations]: Found implementation of procedure flush [2022-11-19 07:56:22,663 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_set_termios [2022-11-19 07:56:22,663 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_set_termios [2022-11-19 07:56:22,664 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:56:22,664 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:56:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure r3964_ioctl [2022-11-19 07:56:22,666 INFO L138 BoogieDeclarations]: Found implementation of procedure r3964_ioctl [2022-11-19 07:56:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure remove_from_tx_queue [2022-11-19 07:56:22,666 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_from_tx_queue [2022-11-19 07:56:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:56:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure tty_lock [2022-11-19 07:56:22,668 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_lock [2022-11-19 07:56:22,668 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_transmit [2022-11-19 07:56:22,668 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_transmit [2022-11-19 07:56:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:56:22,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:56:22,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:56:23,241 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:56:23,246 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:56:23,469 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:56:27,461 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:56:28,142 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:56:28,143 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:56:28,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:28 BoogieIcfgContainer [2022-11-19 07:56:28,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:56:28,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:56:28,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:56:28,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:56:28,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:56:20" (1/3) ... [2022-11-19 07:56:28,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9bc775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:28, skipping insertion in model container [2022-11-19 07:56:28,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:56:22" (2/3) ... [2022-11-19 07:56:28,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9bc775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:56:28, skipping insertion in model container [2022-11-19 07:56:28,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:56:28" (3/3) ... [2022-11-19 07:56:28,164 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--tty--n_r3964.ko-entry_point.cil.out.i [2022-11-19 07:56:28,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:56:28,187 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:56:28,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:56:28,290 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;@1a174394, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:56:28,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:56:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 592 states, 365 states have (on average 1.4054794520547946) internal successors, (513), 401 states have internal predecessors, (513), 185 states have call successors, (185), 41 states have call predecessors, (185), 40 states have return successors, (181), 171 states have call predecessors, (181), 181 states have call successors, (181) [2022-11-19 07:56:28,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-19 07:56:28,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:28,318 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:28,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:28,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:28,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1901612867, now seen corresponding path program 1 times [2022-11-19 07:56:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601651907] [2022-11-19 07:56:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:28,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-19 07:56:29,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601651907] [2022-11-19 07:56:29,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601651907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:29,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:29,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:56:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302464098] [2022-11-19 07:56:29,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:29,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:56:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:56:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:56:29,167 INFO L87 Difference]: Start difference. First operand has 592 states, 365 states have (on average 1.4054794520547946) internal successors, (513), 401 states have internal predecessors, (513), 185 states have call successors, (185), 41 states have call predecessors, (185), 40 states have return successors, (181), 171 states have call predecessors, (181), 181 states have call successors, (181) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:56:32,688 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 [] [2022-11-19 07:56:35,001 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 [] [2022-11-19 07:56:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:35,195 INFO L93 Difference]: Finished difference Result 1383 states and 2076 transitions. [2022-11-19 07:56:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 135 [2022-11-19 07:56:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:35,216 INFO L225 Difference]: With dead ends: 1383 [2022-11-19 07:56:35,217 INFO L226 Difference]: Without dead ends: 812 [2022-11-19 07:56:35,228 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 [2022-11-19 07:56:35,237 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 369 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:35,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 1565 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-11-19 07:56:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-11-19 07:56:35,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 809. [2022-11-19 07:56:35,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 499 states have (on average 1.3847695390781563) internal successors, (691), 546 states have internal predecessors, (691), 245 states have call successors, (245), 65 states have call predecessors, (245), 64 states have return successors, (244), 229 states have call predecessors, (244), 244 states have call successors, (244) [2022-11-19 07:56:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1180 transitions. [2022-11-19 07:56:35,434 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1180 transitions. Word has length 135 [2022-11-19 07:56:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:35,438 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1180 transitions. [2022-11-19 07:56:35,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:56:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1180 transitions. [2022-11-19 07:56:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-19 07:56:35,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:35,456 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:35,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:56:35,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:35,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:35,458 INFO L85 PathProgramCache]: Analyzing trace with hash 963696125, now seen corresponding path program 1 times [2022-11-19 07:56:35,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:35,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963106284] [2022-11-19 07:56:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:35,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-19 07:56:36,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:36,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963106284] [2022-11-19 07:56:36,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963106284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:36,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:36,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:56:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419383187] [2022-11-19 07:56:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:36,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:36,019 INFO L87 Difference]: Start difference. First operand 809 states and 1180 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:56:40,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:56:42,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:56:46,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:56:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:46,266 INFO L93 Difference]: Finished difference Result 3096 states and 4599 transitions. [2022-11-19 07:56:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:56:46,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 146 [2022-11-19 07:56:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:46,288 INFO L225 Difference]: With dead ends: 3096 [2022-11-19 07:56:46,288 INFO L226 Difference]: Without dead ends: 2329 [2022-11-19 07:56:46,293 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 [2022-11-19 07:56:46,295 INFO L413 NwaCegarLoop]: 1147 mSDtfsCounter, 1652 mSDsluCounter, 1864 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 3011 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:46,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1652 Valid, 3011 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 763 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-11-19 07:56:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-11-19 07:56:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 2313. [2022-11-19 07:56:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1441 states have (on average 1.3927827897293545) internal successors, (2007), 1574 states have internal predecessors, (2007), 689 states have call successors, (689), 183 states have call predecessors, (689), 182 states have return successors, (756), 645 states have call predecessors, (756), 688 states have call successors, (756) [2022-11-19 07:56:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3452 transitions. [2022-11-19 07:56:46,489 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3452 transitions. Word has length 146 [2022-11-19 07:56:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:46,490 INFO L495 AbstractCegarLoop]: Abstraction has 2313 states and 3452 transitions. [2022-11-19 07:56:46,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:56:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3452 transitions. [2022-11-19 07:56:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 07:56:46,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:46,493 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:46,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:56:46,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:46,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:46,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1697307687, now seen corresponding path program 1 times [2022-11-19 07:56:46,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:46,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489374848] [2022-11-19 07:56:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:46,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-19 07:56:46,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:46,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489374848] [2022-11-19 07:56:46,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489374848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:46,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:46,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:56:46,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456334971] [2022-11-19 07:56:46,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:46,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:46,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:46,781 INFO L87 Difference]: Start difference. First operand 2313 states and 3452 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:56:50,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:56:54,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:56:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:54,949 INFO L93 Difference]: Finished difference Result 9092 states and 13929 transitions. [2022-11-19 07:56:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:56:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 147 [2022-11-19 07:56:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:55,004 INFO L225 Difference]: With dead ends: 9092 [2022-11-19 07:56:55,005 INFO L226 Difference]: Without dead ends: 6821 [2022-11-19 07:56:55,023 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 [2022-11-19 07:56:55,027 INFO L413 NwaCegarLoop]: 1129 mSDtfsCounter, 1645 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1651 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:55,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1651 Valid, 2987 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 752 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2022-11-19 07:56:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6821 states. [2022-11-19 07:56:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6821 to 6793. [2022-11-19 07:56:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 4255 states have (on average 1.3943595769682726) internal successors, (5933), 4638 states have internal predecessors, (5933), 2001 states have call successors, (2001), 537 states have call predecessors, (2001), 536 states have return successors, (2554), 1869 states have call predecessors, (2554), 2000 states have call successors, (2554) [2022-11-19 07:56:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 10488 transitions. [2022-11-19 07:56:55,592 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 10488 transitions. Word has length 147 [2022-11-19 07:56:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:55,594 INFO L495 AbstractCegarLoop]: Abstraction has 6793 states and 10488 transitions. [2022-11-19 07:56:55,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:56:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 10488 transitions. [2022-11-19 07:56:55,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-19 07:56:55,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:55,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:55,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:56:55,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:56:55,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1482210933, now seen corresponding path program 1 times [2022-11-19 07:56:55,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:55,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461616391] [2022-11-19 07:56:55,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:55,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-19 07:56:55,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:55,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461616391] [2022-11-19 07:56:55,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461616391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:55,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:55,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:56:55,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302729326] [2022-11-19 07:56:56,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:56,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:56,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:56:56,003 INFO L87 Difference]: Start difference. First operand 6793 states and 10488 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:57:01,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:05,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:05,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:05,699 INFO L93 Difference]: Finished difference Result 27000 states and 42447 transitions. [2022-11-19 07:57:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:57:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 148 [2022-11-19 07:57:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:05,862 INFO L225 Difference]: With dead ends: 27000 [2022-11-19 07:57:05,862 INFO L226 Difference]: Without dead ends: 20249 [2022-11-19 07:57:05,898 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 [2022-11-19 07:57:05,899 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 2109 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 331 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2109 SdHoareTripleChecker+Valid, 2284 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:05,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2109 Valid, 2284 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 645 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-19 07:57:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20249 states. [2022-11-19 07:57:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20249 to 20233. [2022-11-19 07:57:07,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20233 states, 12709 states have (on average 1.392320402864112) internal successors, (17695), 13818 states have internal predecessors, (17695), 5925 states have call successors, (5925), 1599 states have call predecessors, (5925), 1598 states have return successors, (8334), 5565 states have call predecessors, (8334), 5924 states have call successors, (8334) [2022-11-19 07:57:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20233 states to 20233 states and 31954 transitions. [2022-11-19 07:57:07,515 INFO L78 Accepts]: Start accepts. Automaton has 20233 states and 31954 transitions. Word has length 148 [2022-11-19 07:57:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:07,517 INFO L495 AbstractCegarLoop]: Abstraction has 20233 states and 31954 transitions. [2022-11-19 07:57:07,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:57:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20233 states and 31954 transitions. [2022-11-19 07:57:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-19 07:57:07,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:07,522 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:07,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:57:07,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:07,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1921927455, now seen corresponding path program 1 times [2022-11-19 07:57:07,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:07,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746239258] [2022-11-19 07:57:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:07,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-19 07:57:07,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746239258] [2022-11-19 07:57:07,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746239258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:07,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:07,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:57:07,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802894617] [2022-11-19 07:57:07,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:57:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:07,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:57:07,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:57:07,791 INFO L87 Difference]: Start difference. First operand 20233 states and 31954 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:57:12,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:17,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:18,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:18,255 INFO L93 Difference]: Finished difference Result 78387 states and 125086 transitions. [2022-11-19 07:57:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:57:18,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 149 [2022-11-19 07:57:18,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:18,660 INFO L225 Difference]: With dead ends: 78387 [2022-11-19 07:57:18,660 INFO L226 Difference]: Without dead ends: 58196 [2022-11-19 07:57:18,758 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 [2022-11-19 07:57:18,759 INFO L413 NwaCegarLoop]: 1114 mSDtfsCounter, 1643 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:18,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 2962 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 751 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 07:57:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58196 states. [2022-11-19 07:57:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58196 to 58052. [2022-11-19 07:57:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58052 states, 36670 states have (on average 1.38933733296973) internal successors, (50947), 39801 states have internal predecessors, (50947), 16737 states have call successors, (16737), 4597 states have call predecessors, (16737), 4644 states have return successors, (25143), 15708 states have call predecessors, (25143), 16736 states have call successors, (25143) [2022-11-19 07:57:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58052 states to 58052 states and 92827 transitions. [2022-11-19 07:57:23,650 INFO L78 Accepts]: Start accepts. Automaton has 58052 states and 92827 transitions. Word has length 149 [2022-11-19 07:57:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:23,651 INFO L495 AbstractCegarLoop]: Abstraction has 58052 states and 92827 transitions. [2022-11-19 07:57:23,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2022-11-19 07:57:23,652 INFO L276 IsEmpty]: Start isEmpty. Operand 58052 states and 92827 transitions. [2022-11-19 07:57:23,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-19 07:57:23,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:23,656 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 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] [2022-11-19 07:57:23,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:57:23,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1971870854, now seen corresponding path program 1 times [2022-11-19 07:57:23,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:23,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284967546] [2022-11-19 07:57:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-19 07:57:24,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:24,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284967546] [2022-11-19 07:57:24,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284967546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:24,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:24,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:57:24,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137775764] [2022-11-19 07:57:24,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:24,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:24,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:24,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:24,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:24,075 INFO L87 Difference]: Start difference. First operand 58052 states and 92827 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:57:28,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:33,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:34,584 INFO L93 Difference]: Finished difference Result 140143 states and 221600 transitions. [2022-11-19 07:57:34,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:34,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 156 [2022-11-19 07:57:34,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:35,197 INFO L225 Difference]: With dead ends: 140143 [2022-11-19 07:57:35,197 INFO L226 Difference]: Without dead ends: 82133 [2022-11-19 07:57:35,399 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 [2022-11-19 07:57:35,400 INFO L413 NwaCegarLoop]: 1051 mSDtfsCounter, 488 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:35,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1751 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-19 07:57:35,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82133 states. [2022-11-19 07:57:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82133 to 82129. [2022-11-19 07:57:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82129 states, 52588 states have (on average 1.3796873811515935) internal successors, (72555), 56751 states have internal predecessors, (72555), 22453 states have call successors, (22453), 6991 states have call predecessors, (22453), 7087 states have return successors, (32847), 21240 states have call predecessors, (32847), 22452 states have call successors, (32847) [2022-11-19 07:57:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82129 states to 82129 states and 127855 transitions. [2022-11-19 07:57:39,887 INFO L78 Accepts]: Start accepts. Automaton has 82129 states and 127855 transitions. Word has length 156 [2022-11-19 07:57:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:39,888 INFO L495 AbstractCegarLoop]: Abstraction has 82129 states and 127855 transitions. [2022-11-19 07:57:39,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:57:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 82129 states and 127855 transitions. [2022-11-19 07:57:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:57:39,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:39,891 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 4, 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] [2022-11-19 07:57:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:57:39,892 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2065895272, now seen corresponding path program 1 times [2022-11-19 07:57:39,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:39,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445864990] [2022-11-19 07:57:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2022-11-19 07:57:40,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:40,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445864990] [2022-11-19 07:57:40,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445864990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:40,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:40,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:57:40,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505234275] [2022-11-19 07:57:40,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:40,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:40,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:40,130 INFO L87 Difference]: Start difference. First operand 82129 states and 127855 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:57:44,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:48,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:57:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:49,417 INFO L93 Difference]: Finished difference Result 99725 states and 156107 transitions. [2022-11-19 07:57:49,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:49,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 159 [2022-11-19 07:57:49,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:50,273 INFO L225 Difference]: With dead ends: 99725 [2022-11-19 07:57:50,273 INFO L226 Difference]: Without dead ends: 99722 [2022-11-19 07:57:50,323 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 [2022-11-19 07:57:50,323 INFO L413 NwaCegarLoop]: 955 mSDtfsCounter, 798 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:50,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 1627 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2022-11-19 07:57:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99722 states. [2022-11-19 07:57:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99722 to 97678. [2022-11-19 07:57:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97678 states, 63291 states have (on average 1.384730846407862) internal successors, (87641), 68041 states have internal predecessors, (87641), 25663 states have call successors, (25663), 8687 states have call predecessors, (25663), 8723 states have return successors, (39501), 24038 states have call predecessors, (39501), 25662 states have call successors, (39501) [2022-11-19 07:57:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97678 states to 97678 states and 152805 transitions. [2022-11-19 07:57:56,293 INFO L78 Accepts]: Start accepts. Automaton has 97678 states and 152805 transitions. Word has length 159 [2022-11-19 07:57:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:56,294 INFO L495 AbstractCegarLoop]: Abstraction has 97678 states and 152805 transitions. [2022-11-19 07:57:56,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-19 07:57:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 97678 states and 152805 transitions. [2022-11-19 07:57:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-19 07:57:56,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:56,309 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 3, 3, 3, 3, 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] [2022-11-19 07:57:56,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:57:56,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1426699898, now seen corresponding path program 1 times [2022-11-19 07:57:56,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:56,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599303390] [2022-11-19 07:57:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:56,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-11-19 07:57:56,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599303390] [2022-11-19 07:57:56,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599303390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:56,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:56,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:57:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795717737] [2022-11-19 07:57:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:56,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:56,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:56,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:56,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:56,575 INFO L87 Difference]: Start difference. First operand 97678 states and 152805 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:58:00,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:58:04,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:58:05,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:05,595 INFO L93 Difference]: Finished difference Result 99671 states and 155337 transitions. [2022-11-19 07:58:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:58:05,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 217 [2022-11-19 07:58:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:05,603 INFO L225 Difference]: With dead ends: 99671 [2022-11-19 07:58:05,603 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 07:58:05,806 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 [2022-11-19 07:58:05,807 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 745 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:05,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 836 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-11-19 07:58:05,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 07:58:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 07:58:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:58:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 07:58:05,819 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 217 [2022-11-19 07:58:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:05,819 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 07:58:05,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-19 07:58:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 07:58:05,820 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 07:58:05,822 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:58:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:58:05,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.