./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.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_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/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_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/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_680bc491-de9e-4aa9-a50e-72c14e275ce8/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 3f6913532a755844f996d9829f52a3e3b688eef2b6253ebf9e48902f9dc25d55 --- 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 08:35:44,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:35:44,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:35:44,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:35:44,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:35:44,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:35:44,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:35:44,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:35:44,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:35:44,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:35:44,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:35:44,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:35:44,264 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:35:44,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:35:44,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:35:44,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:35:44,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:35:44,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:35:44,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:35:44,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:35:44,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:35:44,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:35:44,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:35:44,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:35:44,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:35:44,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:35:44,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:35:44,298 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:35:44,298 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:35:44,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:35:44,300 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:35:44,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:35:44,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:35:44,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:35:44,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:35:44,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:35:44,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:35:44,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:35:44,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:35:44,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:35:44,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:35:44,320 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:35:44,372 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:35:44,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:35:44,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:35:44,373 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:35:44,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:35:44,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:35:44,375 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:35:44,375 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:35:44,375 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:35:44,375 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:35:44,377 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:35:44,377 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:35:44,377 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:35:44,377 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:35:44,378 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:35:44,378 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:35:44,378 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:35:44,378 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:35:44,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:35:44,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:35:44,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:35:44,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:35:44,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:35:44,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:35:44,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:35:44,382 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:35:44,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:35:44,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:35:44,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:35:44,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:35:44,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:35:44,384 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:35:44,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:35:44,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:35:44,385 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:35:44,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:35:44,385 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:35:44,385 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:35:44,386 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_680bc491-de9e-4aa9-a50e-72c14e275ce8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6913532a755844f996d9829f52a3e3b688eef2b6253ebf9e48902f9dc25d55 [2022-11-19 08:35:44,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:35:44,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:35:44,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:35:44,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:35:44,752 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:35:44,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i [2022-11-19 08:35:44,839 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/data/8e84118f4/0db471a3952a42caa67ad6e3b5f32ebc/FLAG6b9a5a77c [2022-11-19 08:35:46,313 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:35:46,314 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i [2022-11-19 08:35:46,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/data/8e84118f4/0db471a3952a42caa67ad6e3b5f32ebc/FLAG6b9a5a77c [2022-11-19 08:35:46,820 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/data/8e84118f4/0db471a3952a42caa67ad6e3b5f32ebc [2022-11-19 08:35:46,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:35:46,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:35:46,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:35:46,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:35:46,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:35:46,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:35:46" (1/1) ... [2022-11-19 08:35:46,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c43ef1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:46, skipping insertion in model container [2022-11-19 08:35:46,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:35:46" (1/1) ... [2022-11-19 08:35:46,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:35:47,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:35:53,039 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_680bc491-de9e-4aa9-a50e-72c14e275ce8/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i[502624,502637] [2022-11-19 08:35:53,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:35:53,331 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:35:54,131 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_680bc491-de9e-4aa9-a50e-72c14e275ce8/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i[502624,502637] [2022-11-19 08:35:54,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:35:54,614 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:35:54,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54 WrapperNode [2022-11-19 08:35:54,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:35:54,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:35:54,616 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:35:54,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:35:54,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:54,863 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,277 INFO L138 Inliner]: procedures = 567, calls = 7139, calls flagged for inlining = 254, calls inlined = 183, statements flattened = 10422 [2022-11-19 08:35:55,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:35:55,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:35:55,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:35:55,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:35:55,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:55,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:56,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:35:56,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:35:56,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:35:56,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:35:56,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (1/1) ... [2022-11-19 08:35:56,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:35:56,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:56,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:35:56,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:35:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 08:35:56,113 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 08:35:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure ipv6_hdr [2022-11-19 08:35:56,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ipv6_hdr [2022-11-19 08:35:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-11-19 08:35:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_alloc_skb [2022-11-19 08:35:56,114 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_alloc_skb [2022-11-19 08:35:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_irq [2022-11-19 08:35:56,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_irq [2022-11-19 08:35:56,115 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-19 08:35:56,115 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-19 08:35:56,115 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2022-11-19 08:35:56,115 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2022-11-19 08:35:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure ql_enable_completion_interrupt [2022-11-19 08:35:56,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_enable_completion_interrupt [2022-11-19 08:35:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:35:56,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:35:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_xgmac_reg [2022-11-19 08:35:56,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_xgmac_reg [2022-11-19 08:35:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_reset [2022-11-19 08:35:56,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_reset [2022-11-19 08:35:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap_nocache [2022-11-19 08:35:56,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap_nocache [2022-11-19 08:35:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-19 08:35:56,118 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-19 08:35:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_send [2022-11-19 08:35:56,118 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_send [2022-11-19 08:35:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_page [2022-11-19 08:35:56,118 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_page [2022-11-19 08:35:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2022-11-19 08:35:56,119 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2022-11-19 08:35:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-19 08:35:56,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-19 08:35:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure netif_napi_del [2022-11-19 08:35:56,120 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_napi_del [2022-11-19 08:35:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 08:35:56,120 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 08:35:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2022-11-19 08:35:56,121 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2022-11-19 08:35:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 08:35:56,121 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 08:35:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_regs_len [2022-11-19 08:35:56,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_regs_len [2022-11-19 08:35:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 08:35:56,122 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 08:35:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure PageTail [2022-11-19 08:35:56,123 INFO L138 BoogieDeclarations]: Found implementation of procedure PageTail [2022-11-19 08:35:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure ql_release_all [2022-11-19 08:35:56,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_release_all [2022-11-19 08:35:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mailbox_command [2022-11-19 08:35:56,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mailbox_command [2022-11-19 08:35:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-19 08:35:56,126 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-19 08:35:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_irq_mask [2022-11-19 08:35:56,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_irq_mask [2022-11-19 08:35:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-19 08:35:56,126 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-19 08:35:56,127 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-19 08:35:56,127 INFO L130 BoogieDeclarations]: Found specification of procedure __qlge_vlan_rx_add_vid [2022-11-19 08:35:56,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __qlge_vlan_rx_add_vid [2022-11-19 08:35:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-19 08:35:56,128 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-19 08:35:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_attach [2022-11-19 08:35:56,128 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_attach [2022-11-19 08:35:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:35:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-19 08:35:56,129 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-19 08:35:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure ql_queue_asic_error [2022-11-19 08:35:56,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_queue_asic_error [2022-11-19 08:35:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure ql_update_buffer_queues [2022-11-19 08:35:56,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_update_buffer_queues [2022-11-19 08:35:56,130 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_mem_resources [2022-11-19 08:35:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_mem_resources [2022-11-19 08:35:56,131 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_xgmac_reg [2022-11-19 08:35:56,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_xgmac_reg [2022-11-19 08:35:56,131 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-19 08:35:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-19 08:35:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_up [2022-11-19 08:35:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_up [2022-11-19 08:35:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure ql_eeh_close [2022-11-19 08:35:56,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_eeh_close [2022-11-19 08:35:56,132 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 08:35:56,133 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 08:35:56,133 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr_reg [2022-11-19 08:35:56,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr_reg [2022-11-19 08:35:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 08:35:56,134 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 08:35:56,134 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_consistent_dma_mask [2022-11-19 08:35:56,135 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_consistent_dma_mask [2022-11-19 08:35:56,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:35:56,136 INFO L130 BoogieDeclarations]: Found specification of procedure pci_save_state [2022-11-19 08:35:56,136 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_save_state [2022-11-19 08:35:56,137 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 08:35:56,137 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 08:35:56,138 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 08:35:56,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 08:35:56,138 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_close [2022-11-19 08:35:56,138 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_close [2022-11-19 08:35:56,139 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_mb_sts [2022-11-19 08:35:56,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_mb_sts [2022-11-19 08:35:56,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:35:56,139 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_open [2022-11-19 08:35:56,139 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_open [2022-11-19 08:35:56,140 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2022-11-19 08:35:56,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2022-11-19 08:35:56,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:35:56,140 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-19 08:35:56,141 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-19 08:35:56,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 08:35:56,142 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 08:35:56,143 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_header [2022-11-19 08:35:56,146 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_header [2022-11-19 08:35:56,146 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_offset [2022-11-19 08:35:56,146 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_offset [2022-11-19 08:35:56,146 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_rx_buffers [2022-11-19 08:35:56,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_rx_buffers [2022-11-19 08:35:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2022-11-19 08:35:56,150 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2022-11-19 08:35:56,150 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2022-11-19 08:35:56,151 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2022-11-19 08:35:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write32 [2022-11-19 08:35:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write32 [2022-11-19 08:35:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cam_route_initialize [2022-11-19 08:35:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cam_route_initialize [2022-11-19 08:35:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-19 08:35:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-19 08:35:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-19 08:35:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-19 08:35:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_drvdata [2022-11-19 08:35:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_drvdata [2022-11-19 08:35:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_trylock [2022-11-19 08:35:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_trylock [2022-11-19 08:35:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:35:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_mpi_reg [2022-11-19 08:35:56,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_mpi_reg [2022-11-19 08:35:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure __get_order [2022-11-19 08:35:56,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __get_order [2022-11-19 08:35:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_spinlock [2022-11-19 08:35:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_spinlock [2022-11-19 08:35:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:35:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-19 08:35:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-19 08:35:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-19 08:35:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-19 08:35:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:35:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 08:35:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure ql_sem_unlock [2022-11-19 08:35:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_sem_unlock [2022-11-19 08:35:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_8012_flash_params [2022-11-19 08:35:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_8012_flash_params [2022-11-19 08:35:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-19 08:35:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-19 08:35:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-19 08:35:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-19 08:35:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-19 08:35:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2022-11-19 08:35:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_completion_interrupt [2022-11-19 08:35:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_completion_interrupt [2022-11-19 08:35:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-19 08:35:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-19 08:35:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure ql_clear_routing_entries [2022-11-19 08:35:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_clear_routing_entries [2022-11-19 08:35:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_map_page [2022-11-19 08:35:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_map_page [2022-11-19 08:35:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure ql_link_off [2022-11-19 08:35:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_link_off [2022-11-19 08:35:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 08:35:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 08:35:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2022-11-19 08:35:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2022-11-19 08:35:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure ql_8000_port_initialize [2022-11-19 08:35:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_8000_port_initialize [2022-11-19 08:35:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2022-11-19 08:35:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2022-11-19 08:35:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-19 08:35:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-19 08:35:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 08:35:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 08:35:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mpi_mutex_of_ql_adapter [2022-11-19 08:35:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mpi_mutex_of_ql_adapter [2022-11-19 08:35:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:35:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:35:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure ql_8012_port_initialize [2022-11-19 08:35:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_8012_port_initialize [2022-11-19 08:35:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure tcp_hdr [2022-11-19 08:35:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure tcp_hdr [2022-11-19 08:35:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_flash_word [2022-11-19 08:35:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_flash_word [2022-11-19 08:35:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_subqueue [2022-11-19 08:35:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_subqueue [2022-11-19 08:35:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-19 08:35:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-19 08:35:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure ql_release_adapter_resources [2022-11-19 08:35:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_release_adapter_resources [2022-11-19 08:35:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:35:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:35:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure csum_tcpudp_magic [2022-11-19 08:35:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure csum_tcpudp_magic [2022-11-19 08:35:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work_sync [2022-11-19 08:35:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work_sync [2022-11-19 08:35:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-19 08:35:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~$Pointer$~TO~~dma_addr_t~0 [2022-11-19 08:35:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure ql_free_rx_resources [2022-11-19 08:35:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_free_rx_resources [2022-11-19 08:35:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2022-11-19 08:35:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2022-11-19 08:35:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2022-11-19 08:35:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2022-11-19 08:35:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-19 08:35:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-19 08:35:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure ql_disable_interrupts [2022-11-19 08:35:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_disable_interrupts [2022-11-19 08:35:56,171 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-19 08:35:56,171 INFO L130 BoogieDeclarations]: Found specification of procedure kmemcheck_mark_initialized [2022-11-19 08:35:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure kmemcheck_mark_initialized [2022-11-19 08:35:56,171 INFO L130 BoogieDeclarations]: Found specification of procedure ql_link_on [2022-11-19 08:35:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_link_on [2022-11-19 08:35:56,172 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_set_multicast_list [2022-11-19 08:35:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_set_multicast_list [2022-11-19 08:35:56,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mpi_mutex_of_ql_adapter [2022-11-19 08:35:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mpi_mutex_of_ql_adapter [2022-11-19 08:35:56,172 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 08:35:56,172 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 08:35:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:35:56,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:35:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2022-11-19 08:35:56,173 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2022-11-19 08:35:56,173 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_single [2022-11-19 08:35:56,173 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_single [2022-11-19 08:35:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure ip_hdr [2022-11-19 08:35:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ip_hdr [2022-11-19 08:35:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure ql_tx_ring_clean [2022-11-19 08:35:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_tx_ring_clean [2022-11-19 08:35:56,174 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-19 08:35:56,174 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-19 08:35:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 08:35:56,175 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 08:35:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read_mpi_reg [2022-11-19 08:35:56,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read_mpi_reg [2022-11-19 08:35:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-19 08:35:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-19 08:35:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-19 08:35:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-19 08:35:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure debug_dma_unmap_page [2022-11-19 08:35:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_dma_unmap_page [2022-11-19 08:35:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_subqueue [2022-11-19 08:35:56,182 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_subqueue [2022-11-19 08:35:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-19 08:35:56,185 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-19 08:35:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-19 08:35:56,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-19 08:35:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:35:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 08:35:56,186 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 08:35:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2022-11-19 08:35:56,186 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2022-11-19 08:35:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-19 08:35:56,186 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-19 08:35:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:35:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2022-11-19 08:35:56,187 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2022-11-19 08:35:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_suspend [2022-11-19 08:35:56,187 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_suspend [2022-11-19 08:35:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2022-11-19 08:35:56,188 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2022-11-19 08:35:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:35:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure ql_validate_flash [2022-11-19 08:35:56,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_validate_flash [2022-11-19 08:35:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2022-11-19 08:35:56,188 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2022-11-19 08:35:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure ql_cancel_all_work_sync [2022-11-19 08:35:56,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_cancel_all_work_sync [2022-11-19 08:35:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 08:35:56,189 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 08:35:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-19 08:35:56,189 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-19 08:35:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-11-19 08:35:56,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-11-19 08:35:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure ql_get_8000_flash_params [2022-11-19 08:35:56,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_get_8000_flash_params [2022-11-19 08:35:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure pci_restore_state [2022-11-19 08:35:56,190 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_restore_state [2022-11-19 08:35:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2022-11-19 08:35:56,190 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2022-11-19 08:35:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-19 08:35:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-19 08:35:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-19 08:35:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-19 08:35:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-19 08:35:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-19 08:35:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_initialize [2022-11-19 08:35:56,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_initialize [2022-11-19 08:35:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2022-11-19 08:35:56,192 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2022-11-19 08:35:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure skb_transport_offset [2022-11-19 08:35:56,192 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_transport_offset [2022-11-19 08:35:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-19 08:35:56,193 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-19 08:35:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure skb_network_header [2022-11-19 08:35:56,194 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_network_header [2022-11-19 08:35:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_db_reg [2022-11-19 08:35:56,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_db_reg [2022-11-19 08:35:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 08:35:56,194 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 08:35:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:35:56,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:35:56,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:35:56,195 INFO L130 BoogieDeclarations]: Found specification of procedure ql_adapter_down [2022-11-19 08:35:56,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_adapter_down [2022-11-19 08:35:56,195 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-19 08:35:56,195 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-19 08:35:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-19 08:35:56,196 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-19 08:35:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure ql_queue_fw_error [2022-11-19 08:35:56,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_queue_fw_error [2022-11-19 08:35:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure ql_unmap_send [2022-11-19 08:35:56,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_unmap_send [2022-11-19 08:35:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-19 08:35:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-19 08:35:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mpi_handler [2022-11-19 08:35:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mpi_handler [2022-11-19 08:35:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2022-11-19 08:35:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2022-11-19 08:35:56,197 INFO L130 BoogieDeclarations]: Found specification of procedure ql_mb_set_mgmnt_traffic_ctl [2022-11-19 08:35:56,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_mb_set_mgmnt_traffic_ctl [2022-11-19 08:35:56,198 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_reg_rdy [2022-11-19 08:35:56,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_reg_rdy [2022-11-19 08:35:56,198 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_routing_reg [2022-11-19 08:35:56,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_routing_reg [2022-11-19 08:35:56,198 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_stop_queue [2022-11-19 08:35:56,198 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_stop_queue [2022-11-19 08:35:56,199 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-19 08:35:56,199 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-19 08:35:56,199 INFO L130 BoogieDeclarations]: Found specification of procedure ql_write_cfg [2022-11-19 08:35:56,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_write_cfg [2022-11-19 08:35:56,199 INFO L130 BoogieDeclarations]: Found specification of procedure ql_lbq_block_size [2022-11-19 08:35:56,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_lbq_block_size [2022-11-19 08:35:56,199 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-19 08:35:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~X~$Pointer$~TO~VOID [2022-11-19 08:35:56,200 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-19 08:35:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-19 08:35:56,200 INFO L130 BoogieDeclarations]: Found specification of procedure netif_get_num_default_rss_queues [2022-11-19 08:35:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_get_num_default_rss_queues [2022-11-19 08:35:56,200 INFO L130 BoogieDeclarations]: Found specification of procedure ql_wait_cfg [2022-11-19 08:35:56,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_wait_cfg [2022-11-19 08:35:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2022-11-19 08:35:56,201 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2022-11-19 08:35:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 08:35:56,201 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 08:35:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:35:56,201 INFO L130 BoogieDeclarations]: Found specification of procedure ql_read32 [2022-11-19 08:35:56,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_read32 [2022-11-19 08:35:56,202 INFO L130 BoogieDeclarations]: Found specification of procedure ql_set_mac_addr [2022-11-19 08:35:56,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ql_set_mac_addr [2022-11-19 08:35:56,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2022-11-19 08:35:56,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2022-11-19 08:35:56,202 INFO L130 BoogieDeclarations]: Found specification of procedure netpoll_trap [2022-11-19 08:35:56,202 INFO L138 BoogieDeclarations]: Found implementation of procedure netpoll_trap [2022-11-19 08:35:56,203 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_device [2022-11-19 08:35:56,203 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_device [2022-11-19 08:35:56,203 INFO L130 BoogieDeclarations]: Found specification of procedure qlge_resume [2022-11-19 08:35:56,203 INFO L138 BoogieDeclarations]: Found implementation of procedure qlge_resume [2022-11-19 08:35:57,652 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:35:57,665 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:36:20,963 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:36:25,673 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:36:25,673 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:36:25,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:36:25 BoogieIcfgContainer [2022-11-19 08:36:25,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:36:25,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:36:25,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:36:25,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:36:25,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:35:46" (1/3) ... [2022-11-19 08:36:25,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354c9cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:36:25, skipping insertion in model container [2022-11-19 08:36:25,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:35:54" (2/3) ... [2022-11-19 08:36:25,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354c9cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:36:25, skipping insertion in model container [2022-11-19 08:36:25,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:36:25" (3/3) ... [2022-11-19 08:36:25,717 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--net--ethernet--qlogic--qlge--qlge.ko-ldv_main0.cil.out.i [2022-11-19 08:36:25,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:36:25,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:36:25,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:36:25,892 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;@2cdf29ba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:36:25,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:36:25,907 INFO L276 IsEmpty]: Start isEmpty. Operand has 2329 states, 1408 states have (on average 1.3046875) internal successors, (1837), 1454 states have internal predecessors, (1837), 748 states have call successors, (748), 171 states have call predecessors, (748), 171 states have return successors, (748), 740 states have call predecessors, (748), 748 states have call successors, (748) [2022-11-19 08:36:25,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:36:25,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:25,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:25,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash -384693914, now seen corresponding path program 1 times [2022-11-19 08:36:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164532088] [2022-11-19 08:36:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:27,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164532088] [2022-11-19 08:36:27,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164532088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:27,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:27,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:36:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349655317] [2022-11-19 08:36:27,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:27,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:27,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:27,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:27,636 INFO L87 Difference]: Start difference. First operand has 2329 states, 1408 states have (on average 1.3046875) internal successors, (1837), 1454 states have internal predecessors, (1837), 748 states have call successors, (748), 171 states have call predecessors, (748), 171 states have return successors, (748), 740 states have call predecessors, (748), 748 states have call successors, (748) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:36:28,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:31,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:36:34,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:37,783 WARN L539 Checker$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 08:36:39,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:40,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:42,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:46,134 INFO L93 Difference]: Finished difference Result 6177 states and 8869 transitions. [2022-11-19 08:36:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:46,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2022-11-19 08:36:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:46,188 INFO L225 Difference]: With dead ends: 6177 [2022-11-19 08:36:46,189 INFO L226 Difference]: Without dead ends: 3835 [2022-11-19 08:36:46,209 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 08:36:46,213 INFO L413 NwaCegarLoop]: 3674 mSDtfsCounter, 3288 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3294 SdHoareTripleChecker+Valid, 5544 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:46,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3294 Valid, 5544 Invalid, 791 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 788 Invalid, 3 Unknown, 0 Unchecked, 18.0s Time] [2022-11-19 08:36:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2022-11-19 08:36:46,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3827. [2022-11-19 08:36:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 2332 states have (on average 1.3040308747855918) internal successors, (3041), 2408 states have internal predecessors, (3041), 1198 states have call successors, (1198), 298 states have call predecessors, (1198), 296 states have return successors, (1197), 1176 states have call predecessors, (1197), 1193 states have call successors, (1197) [2022-11-19 08:36:46,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 5436 transitions. [2022-11-19 08:36:46,614 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 5436 transitions. Word has length 13 [2022-11-19 08:36:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:46,615 INFO L495 AbstractCegarLoop]: Abstraction has 3827 states and 5436 transitions. [2022-11-19 08:36:46,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:36:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 5436 transitions. [2022-11-19 08:36:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:36:46,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:46,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:46,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:36:46,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:36:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:46,619 INFO L85 PathProgramCache]: Analyzing trace with hash 956991737, now seen corresponding path program 1 times [2022-11-19 08:36:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:36:46,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113850933] [2022-11-19 08:36:46,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:46,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:36:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:47,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:36:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113850933] [2022-11-19 08:36:47,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113850933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:47,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:47,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:36:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794211281] [2022-11-19 08:36:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:47,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:36:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:47,400 INFO L87 Difference]: Start difference. First operand 3827 states and 5436 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:36:48,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:36:50,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:36:53,389 WARN L539 Checker$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 08:36:56,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:01,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:04,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:37:07,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:07,472 INFO L93 Difference]: Finished difference Result 7199 states and 10261 transitions. [2022-11-19 08:37:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-19 08:37:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:07,546 INFO L225 Difference]: With dead ends: 7199 [2022-11-19 08:37:07,546 INFO L226 Difference]: Without dead ends: 7195 [2022-11-19 08:37:07,554 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 08:37:07,555 INFO L413 NwaCegarLoop]: 3693 mSDtfsCounter, 3048 mSDsluCounter, 2845 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3048 SdHoareTripleChecker+Valid, 6538 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:07,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3048 Valid, 6538 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 841 Invalid, 3 Unknown, 0 Unchecked, 19.6s Time] [2022-11-19 08:37:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7195 states. [2022-11-19 08:37:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7195 to 7192. [2022-11-19 08:37:08,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7192 states, 4373 states have (on average 1.3004802195289276) internal successors, (5687), 4510 states have internal predecessors, (5687), 2253 states have call successors, (2253), 576 states have call predecessors, (2253), 565 states have return successors, (2313), 2201 states have call predecessors, (2313), 2247 states have call successors, (2313) [2022-11-19 08:37:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7192 states to 7192 states and 10253 transitions. [2022-11-19 08:37:08,057 INFO L78 Accepts]: Start accepts. Automaton has 7192 states and 10253 transitions. Word has length 14 [2022-11-19 08:37:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:08,057 INFO L495 AbstractCegarLoop]: Abstraction has 7192 states and 10253 transitions. [2022-11-19 08:37:08,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:37:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 7192 states and 10253 transitions. [2022-11-19 08:37:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:37:08,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:08,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:37:08,060 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:37:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash -400421175, now seen corresponding path program 1 times [2022-11-19 08:37:08,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014736422] [2022-11-19 08:37:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:08,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:08,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014736422] [2022-11-19 08:37:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014736422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:08,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:08,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:08,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311291636] [2022-11-19 08:37:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:08,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:08,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:08,915 INFO L87 Difference]: Start difference. First operand 7192 states and 10253 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:37:12,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:37:14,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:18,122 WARN L539 Checker$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 08:37:19,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:24,178 INFO L93 Difference]: Finished difference Result 7203 states and 10265 transitions. [2022-11-19 08:37:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:24,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-11-19 08:37:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:24,251 INFO L225 Difference]: With dead ends: 7203 [2022-11-19 08:37:24,251 INFO L226 Difference]: Without dead ends: 7194 [2022-11-19 08:37:24,259 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 08:37:24,260 INFO L413 NwaCegarLoop]: 3636 mSDtfsCounter, 3264 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3270 SdHoareTripleChecker+Valid, 5490 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:24,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3270 Valid, 5490 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 781 Invalid, 3 Unknown, 0 Unchecked, 14.8s Time] [2022-11-19 08:37:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7194 states. [2022-11-19 08:37:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7194 to 7185. [2022-11-19 08:37:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7185 states, 4369 states have (on average 1.2993820096131838) internal successors, (5677), 4505 states have internal predecessors, (5677), 2250 states have call successors, (2250), 575 states have call predecessors, (2250), 565 states have return successors, (2312), 2200 states have call predecessors, (2312), 2246 states have call successors, (2312) [2022-11-19 08:37:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7185 states to 7185 states and 10239 transitions. [2022-11-19 08:37:24,990 INFO L78 Accepts]: Start accepts. Automaton has 7185 states and 10239 transitions. Word has length 15 [2022-11-19 08:37:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:24,993 INFO L495 AbstractCegarLoop]: Abstraction has 7185 states and 10239 transitions. [2022-11-19 08:37:24,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:37:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 7185 states and 10239 transitions. [2022-11-19 08:37:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-19 08:37:25,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:25,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-11-19 08:37:25,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:37:25,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:37:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -558704772, now seen corresponding path program 1 times [2022-11-19 08:37:25,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:25,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715405738] [2022-11-19 08:37:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:25,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:37:26,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:26,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715405738] [2022-11-19 08:37:26,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715405738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:26,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:26,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:26,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800821114] [2022-11-19 08:37:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:26,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:26,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:26,455 INFO L87 Difference]: Start difference. First operand 7185 states and 10239 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:37:30,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:37:33,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:35,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:37,728 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 08:37:42,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:42,366 INFO L93 Difference]: Finished difference Result 7600 states and 10821 transitions. [2022-11-19 08:37:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2022-11-19 08:37:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:42,437 INFO L225 Difference]: With dead ends: 7600 [2022-11-19 08:37:42,438 INFO L226 Difference]: Without dead ends: 7597 [2022-11-19 08:37:42,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:37:42,447 INFO L413 NwaCegarLoop]: 3088 mSDtfsCounter, 540 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 5757 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:42,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 5757 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 825 Invalid, 3 Unknown, 0 Unchecked, 15.6s Time] [2022-11-19 08:37:42,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7597 states. [2022-11-19 08:37:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7597 to 7597. [2022-11-19 08:37:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7597 states, 4620 states have (on average 1.3047619047619048) internal successors, (6028), 4761 states have internal predecessors, (6028), 2363 states have call successors, (2363), 623 states have call predecessors, (2363), 613 states have return successors, (2426), 2312 states have call predecessors, (2426), 2360 states have call successors, (2426) [2022-11-19 08:37:43,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7597 states to 7597 states and 10817 transitions. [2022-11-19 08:37:43,170 INFO L78 Accepts]: Start accepts. Automaton has 7597 states and 10817 transitions. Word has length 64 [2022-11-19 08:37:43,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:43,171 INFO L495 AbstractCegarLoop]: Abstraction has 7597 states and 10817 transitions. [2022-11-19 08:37:43,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 08:37:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7597 states and 10817 transitions. [2022-11-19 08:37:43,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:37:43,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:43,182 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 08:37:43,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:37:43,183 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:37:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 42964939, now seen corresponding path program 1 times [2022-11-19 08:37:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:37:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115256568] [2022-11-19 08:37:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:43,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:37:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:37:45,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:37:45,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115256568] [2022-11-19 08:37:45,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115256568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:45,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:45,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:45,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539247145] [2022-11-19 08:37:45,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:45,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:37:45,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:45,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:45,459 INFO L87 Difference]: Start difference. First operand 7597 states and 10817 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 08:37:49,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:37:52,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:57,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:37:58,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:00,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:05,168 INFO L93 Difference]: Finished difference Result 10960 states and 15672 transitions. [2022-11-19 08:38:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 82 [2022-11-19 08:38:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:05,278 INFO L225 Difference]: With dead ends: 10960 [2022-11-19 08:38:05,278 INFO L226 Difference]: Without dead ends: 10957 [2022-11-19 08:38:05,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 08:38:05,294 INFO L413 NwaCegarLoop]: 3955 mSDtfsCounter, 2991 mSDsluCounter, 2844 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2991 SdHoareTripleChecker+Valid, 6799 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:05,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2991 Valid, 6799 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 898 Invalid, 3 Unknown, 0 Unchecked, 19.2s Time] [2022-11-19 08:38:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10957 states. [2022-11-19 08:38:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10957 to 10934. [2022-11-19 08:38:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10934 states, 6644 states have (on average 1.3023780854906684) internal successors, (8653), 6849 states have internal predecessors, (8653), 3409 states have call successors, (3409), 894 states have call predecessors, (3409), 880 states have return successors, (3576), 3330 states have call predecessors, (3576), 3406 states have call successors, (3576) [2022-11-19 08:38:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10934 states to 10934 states and 15638 transitions. [2022-11-19 08:38:06,010 INFO L78 Accepts]: Start accepts. Automaton has 10934 states and 15638 transitions. Word has length 82 [2022-11-19 08:38:06,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:06,011 INFO L495 AbstractCegarLoop]: Abstraction has 10934 states and 15638 transitions. [2022-11-19 08:38:06,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 08:38:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10934 states and 15638 transitions. [2022-11-19 08:38:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-19 08:38:06,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:06,039 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:06,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:38:06,040 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:06,040 INFO L85 PathProgramCache]: Analyzing trace with hash -286066398, now seen corresponding path program 1 times [2022-11-19 08:38:06,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:06,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341069008] [2022-11-19 08:38:06,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:06,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:06,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:38:06,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044993182] [2022-11-19 08:38:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:06,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:06,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:06,527 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:06,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:38:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 9296 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:38:10,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:38:10,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:10,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341069008] [2022-11-19 08:38:10,311 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:38:10,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044993182] [2022-11-19 08:38:10,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044993182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:10,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:38:10,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:38:10,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017822646] [2022-11-19 08:38:10,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:10,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:38:10,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:10,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:38:10,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:38:10,314 INFO L87 Difference]: Start difference. First operand 10934 states and 15638 transitions. Second operand has 6 states, 5 states have (on average 21.8) internal successors, (109), 6 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:38:15,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:38:18,815 WARN L539 Checker$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 08:38:25,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:27,499 WARN L539 Checker$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 08:38:29,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:36,927 INFO L93 Difference]: Finished difference Result 21965 states and 31962 transitions. [2022-11-19 08:38:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:38:36,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 6 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 165 [2022-11-19 08:38:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:37,012 INFO L225 Difference]: With dead ends: 21965 [2022-11-19 08:38:37,012 INFO L226 Difference]: Without dead ends: 10964 [2022-11-19 08:38:37,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:38:37,108 INFO L413 NwaCegarLoop]: 2881 mSDtfsCounter, 14 mSDsluCounter, 11433 mSDsCounter, 0 mSdLazyCounter, 2210 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14314 SdHoareTripleChecker+Invalid, 2234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2210 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:37,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 14314 Invalid, 2234 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [20 Valid, 2210 Invalid, 4 Unknown, 0 Unchecked, 26.0s Time] [2022-11-19 08:38:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2022-11-19 08:38:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 10964. [2022-11-19 08:38:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 6656 states have (on average 1.3015324519230769) internal successors, (8663), 6867 states have internal predecessors, (8663), 3421 states have call successors, (3421), 894 states have call predecessors, (3421), 886 states have return successors, (3594), 3342 states have call predecessors, (3594), 3418 states have call successors, (3594) [2022-11-19 08:38:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 15678 transitions. [2022-11-19 08:38:38,064 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 15678 transitions. Word has length 165 [2022-11-19 08:38:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:38,065 INFO L495 AbstractCegarLoop]: Abstraction has 10964 states and 15678 transitions. [2022-11-19 08:38:38,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.8) internal successors, (109), 6 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:38:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 15678 transitions. [2022-11-19 08:38:38,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-19 08:38:38,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:38,098 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:38:38,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:38,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:38,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:38:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash 552224984, now seen corresponding path program 1 times [2022-11-19 08:38:38,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:38:38,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239447203] [2022-11-19 08:38:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:38,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:38:38,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:38:38,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074516895] [2022-11-19 08:38:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:38,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:38,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:38,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:38:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 9298 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:38:42,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:38:42,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:42,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:38:42,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239447203] [2022-11-19 08:38:42,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:38:42,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074516895] [2022-11-19 08:38:42,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074516895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:42,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:38:42,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:38:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273094994] [2022-11-19 08:38:42,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:38:42,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:38:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:38:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:38:42,450 INFO L87 Difference]: Start difference. First operand 10964 states and 15678 transitions. Second operand has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:38:47,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:38:50,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:52,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:54,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:56,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:59,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:00,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:03,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:05,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:07,341 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 08:39:15,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:15,716 INFO L93 Difference]: Finished difference Result 22025 states and 32042 transitions. [2022-11-19 08:39:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:39:15,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 166 [2022-11-19 08:39:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:15,792 INFO L225 Difference]: With dead ends: 22025 [2022-11-19 08:39:15,792 INFO L226 Difference]: Without dead ends: 10994 [2022-11-19 08:39:15,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:39:15,866 INFO L413 NwaCegarLoop]: 2868 mSDtfsCounter, 37 mSDsluCounter, 11379 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 26 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 14247 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:15,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 14247 Invalid, 2280 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 2249 Invalid, 5 Unknown, 0 Unchecked, 32.6s Time] [2022-11-19 08:39:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10994 states. [2022-11-19 08:39:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10994 to 10964. [2022-11-19 08:39:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 6656 states have (on average 1.3009314903846154) internal successors, (8659), 6867 states have internal predecessors, (8659), 3421 states have call successors, (3421), 894 states have call predecessors, (3421), 886 states have return successors, (3594), 3342 states have call predecessors, (3594), 3418 states have call successors, (3594) [2022-11-19 08:39:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 15674 transitions. [2022-11-19 08:39:16,550 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 15674 transitions. Word has length 166 [2022-11-19 08:39:16,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:16,551 INFO L495 AbstractCegarLoop]: Abstraction has 10964 states and 15674 transitions. [2022-11-19 08:39:16,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.333333333333332) internal successors, (110), 7 states have internal predecessors, (110), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:39:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 15674 transitions. [2022-11-19 08:39:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-19 08:39:16,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:16,581 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:39:16,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:16,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:39:16,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:39:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1330160233, now seen corresponding path program 1 times [2022-11-19 08:39:16,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:39:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797115050] [2022-11-19 08:39:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:16,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:39:17,134 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:39:17,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248672657] [2022-11-19 08:39:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:17,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:39:17,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:39:17,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:39:17,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:39:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 9264 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:39:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:39:20,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:20,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:39:20,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797115050] [2022-11-19 08:39:20,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:39:20,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248672657] [2022-11-19 08:39:20,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248672657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:20,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:20,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:39:20,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795142704] [2022-11-19 08:39:20,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:20,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:39:20,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:39:20,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:39:20,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:39:20,635 INFO L87 Difference]: Start difference. First operand 10964 states and 15674 transitions. Second operand has 7 states, 6 states have (on average 18.166666666666668) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:39:25,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:39:27,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:29,895 WARN L539 Checker$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 08:39:31,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:33,918 WARN L539 Checker$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 08:39:35,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:39,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:40,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:43,200 WARN L539 Checker$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 08:39:45,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:47,022 WARN L539 Checker$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 08:39:49,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:50,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:39:59,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:59,888 INFO L93 Difference]: Finished difference Result 22031 states and 32021 transitions. [2022-11-19 08:39:59,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:39:59,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.166666666666668) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 165 [2022-11-19 08:39:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:59,967 INFO L225 Difference]: With dead ends: 22031 [2022-11-19 08:39:59,968 INFO L226 Difference]: Without dead ends: 11048 [2022-11-19 08:40:00,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:40:00,046 INFO L413 NwaCegarLoop]: 2867 mSDtfsCounter, 38 mSDsluCounter, 11377 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 28 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 14244 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:40:00,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 14244 Invalid, 2290 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [28 Valid, 2254 Invalid, 8 Unknown, 0 Unchecked, 38.7s Time] [2022-11-19 08:40:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11048 states. [2022-11-19 08:40:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11048 to 11048. [2022-11-19 08:40:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11048 states, 6704 states have (on average 1.3002684964200477) internal successors, (8717), 6921 states have internal predecessors, (8717), 3445 states have call successors, (3445), 900 states have call predecessors, (3445), 898 states have return successors, (3630), 3366 states have call predecessors, (3630), 3442 states have call successors, (3630) [2022-11-19 08:40:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11048 states to 11048 states and 15792 transitions. [2022-11-19 08:40:00,747 INFO L78 Accepts]: Start accepts. Automaton has 11048 states and 15792 transitions. Word has length 165 [2022-11-19 08:40:00,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:40:00,747 INFO L495 AbstractCegarLoop]: Abstraction has 11048 states and 15792 transitions. [2022-11-19 08:40:00,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.166666666666668) internal successors, (109), 7 states have internal predecessors, (109), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:40:00,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11048 states and 15792 transitions. [2022-11-19 08:40:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-19 08:40:00,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:40:00,776 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:40:00,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:40:01,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:01,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:40:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:40:01,005 INFO L85 PathProgramCache]: Analyzing trace with hash 215596402, now seen corresponding path program 1 times [2022-11-19 08:40:01,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:40:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602727066] [2022-11-19 08:40:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:01,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:40:01,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:40:01,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332060683] [2022-11-19 08:40:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:40:01,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:40:01,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:40:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 9240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:40:05,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:40:05,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:40:05,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:40:05,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602727066] [2022-11-19 08:40:05,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:40:05,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332060683] [2022-11-19 08:40:05,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332060683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:40:05,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:40:05,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:40:05,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396259554] [2022-11-19 08:40:05,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:40:05,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:40:05,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:40:05,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:40:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:40:05,310 INFO L87 Difference]: Start difference. First operand 11048 states and 15792 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 08:40:06,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:40:10,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:40:14,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:40:19,900 WARN L539 Checker$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 08:40:21,913 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 08:40:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:40:28,976 INFO L93 Difference]: Finished difference Result 22245 states and 32415 transitions. [2022-11-19 08:40:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:40:28,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 162 [2022-11-19 08:40:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:40:29,058 INFO L225 Difference]: With dead ends: 22245 [2022-11-19 08:40:29,058 INFO L226 Difference]: Without dead ends: 11204 [2022-11-19 08:40:29,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:40:29,134 INFO L413 NwaCegarLoop]: 2895 mSDtfsCounter, 5 mSDsluCounter, 8673 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 11568 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:40:29,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 11568 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1670 Invalid, 4 Unknown, 0 Unchecked, 23.1s Time] [2022-11-19 08:40:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11204 states. [2022-11-19 08:40:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11204 to 11092. [2022-11-19 08:40:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11092 states, 6740 states have (on average 1.2986646884272997) internal successors, (8753), 6951 states have internal predecessors, (8753), 3445 states have call successors, (3445), 900 states have call predecessors, (3445), 906 states have return successors, (3650), 3380 states have call predecessors, (3650), 3442 states have call successors, (3650) [2022-11-19 08:40:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11092 states to 11092 states and 15848 transitions. [2022-11-19 08:40:29,982 INFO L78 Accepts]: Start accepts. Automaton has 11092 states and 15848 transitions. Word has length 162 [2022-11-19 08:40:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:40:29,983 INFO L495 AbstractCegarLoop]: Abstraction has 11092 states and 15848 transitions. [2022-11-19 08:40:29,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-19 08:40:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11092 states and 15848 transitions. [2022-11-19 08:40:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-19 08:40:30,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:40:30,012 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:40:30,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:40:30,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 08:40:30,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:40:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:40:30,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1206273405, now seen corresponding path program 1 times [2022-11-19 08:40:30,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:40:30,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742140132] [2022-11-19 08:40:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:30,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:40:30,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:40:30,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762308191] [2022-11-19 08:40:30,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:30,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:30,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:40:30,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:40:30,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:40:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:33,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 9302 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:40:33,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:40:34,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:40:34,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:40:34,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742140132] [2022-11-19 08:40:34,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:40:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762308191] [2022-11-19 08:40:34,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762308191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:40:34,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:40:34,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:40:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750907670] [2022-11-19 08:40:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:40:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:40:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:40:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:40:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:40:34,044 INFO L87 Difference]: Start difference. First operand 11092 states and 15848 transitions. Second operand has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 7 states have internal predecessors, (112), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:40:39,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:40:41,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:40:49,113 WARN L539 Checker$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 08:40:50,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:40:52,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:40:55,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:40:57,368 WARN L539 Checker$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 08:41:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:41:06,627 INFO L93 Difference]: Finished difference Result 22305 states and 32306 transitions. [2022-11-19 08:41:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:41:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 7 states have internal predecessors, (112), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 168 [2022-11-19 08:41:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:41:06,703 INFO L225 Difference]: With dead ends: 22305 [2022-11-19 08:41:06,703 INFO L226 Difference]: Without dead ends: 11220 [2022-11-19 08:41:06,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:41:06,774 INFO L413 NwaCegarLoop]: 2865 mSDtfsCounter, 39 mSDsluCounter, 11373 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 30 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 14238 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:41:06,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 14238 Invalid, 2284 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 2249 Invalid, 5 Unknown, 0 Unchecked, 31.9s Time] [2022-11-19 08:41:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2022-11-19 08:41:07,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 11220. [2022-11-19 08:41:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11220 states, 6820 states have (on average 1.2975073313782992) internal successors, (8849), 7031 states have internal predecessors, (8849), 3477 states have call successors, (3477), 908 states have call predecessors, (3477), 922 states have return successors, (3710), 3420 states have call predecessors, (3710), 3474 states have call successors, (3710) [2022-11-19 08:41:07,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11220 states to 11220 states and 16036 transitions. [2022-11-19 08:41:07,550 INFO L78 Accepts]: Start accepts. Automaton has 11220 states and 16036 transitions. Word has length 168 [2022-11-19 08:41:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:41:07,552 INFO L495 AbstractCegarLoop]: Abstraction has 11220 states and 16036 transitions. [2022-11-19 08:41:07,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.666666666666668) internal successors, (112), 7 states have internal predecessors, (112), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:41:07,553 INFO L276 IsEmpty]: Start isEmpty. Operand 11220 states and 16036 transitions. [2022-11-19 08:41:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-19 08:41:07,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:41:07,591 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:41:07,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:41:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:41:07,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:41:07,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:41:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash -221458388, now seen corresponding path program 1 times [2022-11-19 08:41:07,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:41:07,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765749091] [2022-11-19 08:41:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:41:08,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:41:08,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831357669] [2022-11-19 08:41:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:08,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:41:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:41:08,193 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:41:08,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:41:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:12,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 9304 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:41:12,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:41:12,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:41:12,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:41:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765749091] [2022-11-19 08:41:12,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:41:12,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831357669] [2022-11-19 08:41:12,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831357669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:41:12,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:41:12,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:41:12,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000760490] [2022-11-19 08:41:12,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:41:12,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:41:12,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:41:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:41:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:41:12,164 INFO L87 Difference]: Start difference. First operand 11220 states and 16036 transitions. Second operand has 7 states, 6 states have (on average 18.833333333333332) internal successors, (113), 7 states have internal predecessors, (113), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:41:18,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:20,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:41:23,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:26,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:29,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:31,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:33,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:35,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:37,862 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 08:41:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:41:50,205 INFO L93 Difference]: Finished difference Result 22559 states and 32658 transitions. [2022-11-19 08:41:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:41:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.833333333333332) internal successors, (113), 7 states have internal predecessors, (113), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) Word has length 169 [2022-11-19 08:41:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:41:50,293 INFO L225 Difference]: With dead ends: 22559 [2022-11-19 08:41:50,293 INFO L226 Difference]: Without dead ends: 11326 [2022-11-19 08:41:50,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:41:50,370 INFO L413 NwaCegarLoop]: 2862 mSDtfsCounter, 34 mSDsluCounter, 14222 mSDsCounter, 0 mSdLazyCounter, 2688 mSolverCounterSat, 32 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 17084 SdHoareTripleChecker+Invalid, 2724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2688 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:41:50,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 17084 Invalid, 2724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 2688 Invalid, 4 Unknown, 0 Unchecked, 37.4s Time] [2022-11-19 08:41:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11326 states. [2022-11-19 08:41:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11326 to 11316. [2022-11-19 08:41:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 6880 states have (on average 1.296656976744186) internal successors, (8921), 7091 states have internal predecessors, (8921), 3501 states have call successors, (3501), 914 states have call predecessors, (3501), 934 states have return successors, (3764), 3450 states have call predecessors, (3764), 3498 states have call successors, (3764) [2022-11-19 08:41:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 16186 transitions. [2022-11-19 08:41:51,328 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 16186 transitions. Word has length 169 [2022-11-19 08:41:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:41:51,328 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 16186 transitions. [2022-11-19 08:41:51,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.833333333333332) internal successors, (113), 7 states have internal predecessors, (113), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (24), 4 states have call predecessors, (24), 4 states have call successors, (24) [2022-11-19 08:41:51,329 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 16186 transitions. [2022-11-19 08:41:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-19 08:41:51,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:41:51,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:41:51,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:41:51,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:41:51,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:41:51,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:41:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1682141825, now seen corresponding path program 1 times [2022-11-19 08:41:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:41:51,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316689990] [2022-11-19 08:41:51,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:51,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:41:52,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:41:52,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729665324] [2022-11-19 08:41:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:52,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:41:52,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:41:52,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:41:52,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:41:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:56,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 9463 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:41:56,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:41:56,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:41:56,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:41:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316689990] [2022-11-19 08:41:56,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:41:56,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729665324] [2022-11-19 08:41:56,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729665324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:41:56,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:41:56,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:41:56,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898630221] [2022-11-19 08:41:56,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:41:56,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:41:56,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:41:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:41:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:41:56,446 INFO L87 Difference]: Start difference. First operand 11316 states and 16186 transitions. Second operand has 7 states, 6 states have (on average 23.0) internal successors, (138), 7 states have internal predecessors, (138), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-19 08:42:03,434 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 08:42:05,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:10,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:14,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:15,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:17,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:19,653 WARN L539 Checker$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 08:42:21,663 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 08:42:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:35,376 INFO L93 Difference]: Finished difference Result 22745 states and 32958 transitions. [2022-11-19 08:42:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:42:35,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.0) internal successors, (138), 7 states have internal predecessors, (138), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 203 [2022-11-19 08:42:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:35,450 INFO L225 Difference]: With dead ends: 22745 [2022-11-19 08:42:35,451 INFO L226 Difference]: Without dead ends: 11356 [2022-11-19 08:42:35,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:42:35,519 INFO L413 NwaCegarLoop]: 2861 mSDtfsCounter, 33 mSDsluCounter, 14219 mSDsCounter, 0 mSdLazyCounter, 2686 mSolverCounterSat, 34 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17080 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2686 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:35,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 17080 Invalid, 2726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 2686 Invalid, 6 Unknown, 0 Unchecked, 38.2s Time] [2022-11-19 08:42:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11356 states. [2022-11-19 08:42:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11356 to 11316. [2022-11-19 08:42:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 6880 states have (on average 1.296656976744186) internal successors, (8921), 7091 states have internal predecessors, (8921), 3501 states have call successors, (3501), 914 states have call predecessors, (3501), 934 states have return successors, (3764), 3450 states have call predecessors, (3764), 3498 states have call successors, (3764) [2022-11-19 08:42:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 16186 transitions. [2022-11-19 08:42:36,258 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 16186 transitions. Word has length 203 [2022-11-19 08:42:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:36,259 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 16186 transitions. [2022-11-19 08:42:36,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.0) internal successors, (138), 7 states have internal predecessors, (138), 4 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-19 08:42:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 16186 transitions. [2022-11-19 08:42:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-19 08:42:36,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:36,286 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:42:36,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:36,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:42:36,500 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:42:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1610163814, now seen corresponding path program 1 times [2022-11-19 08:42:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:42:36,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759241766] [2022-11-19 08:42:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:42:36,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:42:36,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276946994] [2022-11-19 08:42:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:36,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:42:36,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:42:36,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:42:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 9429 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:42:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:42:40,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:42:40,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:42:40,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759241766] [2022-11-19 08:42:40,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:42:40,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276946994] [2022-11-19 08:42:40,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276946994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:42:40,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:42:40,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:42:40,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893652859] [2022-11-19 08:42:40,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:42:40,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:42:40,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:42:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:42:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:42:40,981 INFO L87 Difference]: Start difference. First operand 11316 states and 16186 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 08:42:45,326 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 08:42:47,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:42:49,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:51,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:53,550 WARN L539 Checker$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 08:42:58,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:58,411 INFO L93 Difference]: Finished difference Result 22645 states and 32634 transitions. [2022-11-19 08:42:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:42:58,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 202 [2022-11-19 08:42:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:58,468 INFO L225 Difference]: With dead ends: 22645 [2022-11-19 08:42:58,468 INFO L226 Difference]: Without dead ends: 11336 [2022-11-19 08:42:58,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 200 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 08:42:58,511 INFO L413 NwaCegarLoop]: 2885 mSDtfsCounter, 140 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 5618 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:58,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 5618 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 798 Invalid, 3 Unknown, 0 Unchecked, 17.0s Time] [2022-11-19 08:42:58,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2022-11-19 08:42:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 11316. [2022-11-19 08:42:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 6880 states have (on average 1.2957848837209303) internal successors, (8915), 7091 states have internal predecessors, (8915), 3501 states have call successors, (3501), 914 states have call predecessors, (3501), 934 states have return successors, (3764), 3450 states have call predecessors, (3764), 3498 states have call successors, (3764) [2022-11-19 08:42:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 16180 transitions. [2022-11-19 08:42:59,337 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 16180 transitions. Word has length 202 [2022-11-19 08:42:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:59,338 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 16180 transitions. [2022-11-19 08:42:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-19 08:42:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 16180 transitions. [2022-11-19 08:42:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-19 08:42:59,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:59,358 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:42:59,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 08:42:59,571 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:42:59,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 138320223, now seen corresponding path program 1 times [2022-11-19 08:42:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:42:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344553950] [2022-11-19 08:42:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:42:59,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:42:59,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12537061] [2022-11-19 08:42:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:59,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:59,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:42:59,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:42:59,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:43:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 9778 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:43:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 08:43:05,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 08:43:06,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:43:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344553950] [2022-11-19 08:43:06,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:43:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12537061] [2022-11-19 08:43:06,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12537061] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:43:06,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:43:06,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-19 08:43:06,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216785633] [2022-11-19 08:43:06,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:43:06,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:43:06,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:43:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:43:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:43:06,194 INFO L87 Difference]: Start difference. First operand 11316 states and 16180 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-19 08:43:11,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:13,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:18,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:20,610 WARN L539 Checker$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 08:43:22,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:24,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:43:38,469 INFO L93 Difference]: Finished difference Result 18148 states and 26295 transitions. [2022-11-19 08:43:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:43:38,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 253 [2022-11-19 08:43:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:43:38,555 INFO L225 Difference]: With dead ends: 18148 [2022-11-19 08:43:38,555 INFO L226 Difference]: Without dead ends: 18135 [2022-11-19 08:43:38,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:43:38,564 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 4737 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 4189 mSolverCounterSat, 398 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5243 SdHoareTripleChecker+Valid, 4616 SdHoareTripleChecker+Invalid, 4591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 4189 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:43:38,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5243 Valid, 4616 Invalid, 4591 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [398 Valid, 4189 Invalid, 4 Unknown, 0 Unchecked, 31.0s Time] [2022-11-19 08:43:38,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18135 states. [2022-11-19 08:43:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18135 to 18103. [2022-11-19 08:43:39,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18103 states, 10996 states have (on average 1.2932884685340125) internal successors, (14221), 11362 states have internal predecessors, (14221), 5625 states have call successors, (5625), 1416 states have call predecessors, (5625), 1481 states have return successors, (6386), 5566 states have call predecessors, (6386), 5622 states have call successors, (6386) [2022-11-19 08:43:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18103 states to 18103 states and 26232 transitions. [2022-11-19 08:43:39,681 INFO L78 Accepts]: Start accepts. Automaton has 18103 states and 26232 transitions. Word has length 253 [2022-11-19 08:43:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:43:39,682 INFO L495 AbstractCegarLoop]: Abstraction has 18103 states and 26232 transitions. [2022-11-19 08:43:39,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-19 08:43:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 18103 states and 26232 transitions. [2022-11-19 08:43:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-11-19 08:43:39,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:43:39,711 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:43:39,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:43:39,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 08:43:39,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:43:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:43:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash 12521071, now seen corresponding path program 1 times [2022-11-19 08:43:39,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:43:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472942904] [2022-11-19 08:43:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:39,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:43:40,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:43:40,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435056452] [2022-11-19 08:43:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:43:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:43:40,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:43:40,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:43:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:44,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 9909 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:43:44,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:45,046 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-19 08:43:45,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:43:45,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:43:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472942904] [2022-11-19 08:43:45,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:43:45,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435056452] [2022-11-19 08:43:45,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435056452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:43:45,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:43:45,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:43:45,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891745791] [2022-11-19 08:43:45,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:43:45,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:43:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:43:45,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:43:45,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:43:45,054 INFO L87 Difference]: Start difference. First operand 18103 states and 26232 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-19 08:43:49,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:51,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:53,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:55,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:43:57,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:58,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:01,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:03,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:05,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:06,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:12,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:44:12,424 INFO L93 Difference]: Finished difference Result 36253 states and 53213 transitions. [2022-11-19 08:44:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:44:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 312 [2022-11-19 08:44:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:44:12,514 INFO L225 Difference]: With dead ends: 36253 [2022-11-19 08:44:12,514 INFO L226 Difference]: Without dead ends: 18157 [2022-11-19 08:44:12,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:44:12,584 INFO L413 NwaCegarLoop]: 2883 mSDtfsCounter, 7 mSDsluCounter, 5754 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8637 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:44:12,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8637 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1260 Invalid, 3 Unknown, 0 Unchecked, 26.2s Time] [2022-11-19 08:44:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18157 states. [2022-11-19 08:44:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18157 to 18133. [2022-11-19 08:44:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18133 states, 11020 states have (on average 1.2926497277676952) internal successors, (14245), 11389 states have internal predecessors, (14245), 5628 states have call successors, (5628), 1416 states have call predecessors, (5628), 1484 states have return successors, (6399), 5569 states have call predecessors, (6399), 5625 states have call successors, (6399) [2022-11-19 08:44:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18133 states to 18133 states and 26272 transitions. [2022-11-19 08:44:13,729 INFO L78 Accepts]: Start accepts. Automaton has 18133 states and 26272 transitions. Word has length 312 [2022-11-19 08:44:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:44:13,730 INFO L495 AbstractCegarLoop]: Abstraction has 18133 states and 26272 transitions. [2022-11-19 08:44:13,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 2 states have call successors, (55), 2 states have call predecessors, (55), 2 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-19 08:44:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 18133 states and 26272 transitions. [2022-11-19 08:44:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-19 08:44:13,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:44:13,766 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:44:13,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:44:13,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:13,983 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:44:13,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:44:13,984 INFO L85 PathProgramCache]: Analyzing trace with hash 815248969, now seen corresponding path program 1 times [2022-11-19 08:44:13,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:44:13,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187271698] [2022-11-19 08:44:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:44:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:44:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:44:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-11-19 08:44:19,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:44:19,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187271698] [2022-11-19 08:44:19,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187271698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:44:19,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:44:19,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:44:19,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921097751] [2022-11-19 08:44:19,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:44:19,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:44:19,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:44:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:44:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:44:19,600 INFO L87 Difference]: Start difference. First operand 18133 states and 26272 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-19 08:44:23,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:25,903 WARN L539 Checker$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 08:44:27,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:32,043 WARN L539 Checker$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 08:44:34,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:39,170 WARN L539 Checker$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 08:44:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:44:43,612 INFO L93 Difference]: Finished difference Result 21834 states and 31811 transitions. [2022-11-19 08:44:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:44:43,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 252 [2022-11-19 08:44:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:44:43,768 INFO L225 Difference]: With dead ends: 21834 [2022-11-19 08:44:43,768 INFO L226 Difference]: Without dead ends: 21825 [2022-11-19 08:44:43,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 08:44:43,787 INFO L413 NwaCegarLoop]: 3983 mSDtfsCounter, 2957 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2957 SdHoareTripleChecker+Valid, 6826 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:44:43,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2957 Valid, 6826 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 904 Invalid, 5 Unknown, 0 Unchecked, 22.9s Time] [2022-11-19 08:44:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21825 states. [2022-11-19 08:44:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21825 to 21785. [2022-11-19 08:44:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21785 states, 13245 states have (on average 1.2924877312193281) internal successors, (17119), 13689 states have internal predecessors, (17119), 6762 states have call successors, (6762), 1693 states have call predecessors, (6762), 1777 states have return successors, (7861), 6692 states have call predecessors, (7861), 6759 states have call successors, (7861) [2022-11-19 08:44:45,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21785 states to 21785 states and 31742 transitions. [2022-11-19 08:44:45,102 INFO L78 Accepts]: Start accepts. Automaton has 21785 states and 31742 transitions. Word has length 252 [2022-11-19 08:44:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:44:45,103 INFO L495 AbstractCegarLoop]: Abstraction has 21785 states and 31742 transitions. [2022-11-19 08:44:45,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2022-11-19 08:44:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 21785 states and 31742 transitions. [2022-11-19 08:44:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-11-19 08:44:45,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:44:45,140 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:44:45,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:44:45,140 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:44:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:44:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1286506683, now seen corresponding path program 1 times [2022-11-19 08:44:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:44:45,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455543099] [2022-11-19 08:44:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:44:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:44:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:44:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-19 08:44:49,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:44:49,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455543099] [2022-11-19 08:44:49,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455543099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:44:49,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:44:49,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:44:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515399117] [2022-11-19 08:44:49,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:44:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:44:49,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:44:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:44:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:44:49,757 INFO L87 Difference]: Start difference. First operand 21785 states and 31742 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-19 08:44:53,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:55,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:59,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:45:01,729 WARN L539 Checker$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 08:45:08,118 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 08:45:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:11,814 INFO L93 Difference]: Finished difference Result 25503 states and 37361 transitions. [2022-11-19 08:45:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:45:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 323 [2022-11-19 08:45:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:11,938 INFO L225 Difference]: With dead ends: 25503 [2022-11-19 08:45:11,938 INFO L226 Difference]: Without dead ends: 25494 [2022-11-19 08:45:11,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 08:45:11,954 INFO L413 NwaCegarLoop]: 3988 mSDtfsCounter, 2961 mSDsluCounter, 2843 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 6831 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:11,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2961 Valid, 6831 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 906 Invalid, 4 Unknown, 0 Unchecked, 20.8s Time] [2022-11-19 08:45:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25494 states. [2022-11-19 08:45:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25494 to 25454. [2022-11-19 08:45:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25454 states, 15482 states have (on average 1.2924686732980235) internal successors, (20010), 16002 states have internal predecessors, (20010), 7901 states have call successors, (7901), 1970 states have call predecessors, (7901), 2070 states have return successors, (9381), 7819 states have call predecessors, (9381), 7898 states have call successors, (9381) [2022-11-19 08:45:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25454 states to 25454 states and 37292 transitions. [2022-11-19 08:45:13,466 INFO L78 Accepts]: Start accepts. Automaton has 25454 states and 37292 transitions. Word has length 323 [2022-11-19 08:45:13,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:13,467 INFO L495 AbstractCegarLoop]: Abstraction has 25454 states and 37292 transitions. [2022-11-19 08:45:13,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-19 08:45:13,467 INFO L276 IsEmpty]: Start isEmpty. Operand 25454 states and 37292 transitions. [2022-11-19 08:45:13,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-19 08:45:13,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:13,504 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:45:13,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 08:45:13,504 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1756080967, now seen corresponding path program 1 times [2022-11-19 08:45:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:13,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640205498] [2022-11-19 08:45:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:13,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:13,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:45:13,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807782558] [2022-11-19 08:45:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:13,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:45:13,847 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:45:13,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:45:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:18,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 9894 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:45:18,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:45:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-19 08:45:18,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:45:18,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640205498] [2022-11-19 08:45:18,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:45:18,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807782558] [2022-11-19 08:45:18,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807782558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:45:18,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:45:18,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:45:18,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36532004] [2022-11-19 08:45:18,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:18,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:45:18,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:45:18,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:45:18,987 INFO L87 Difference]: Start difference. First operand 25454 states and 37292 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-19 08:45:23,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:45:25,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:45:27,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:45:28,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:45:30,082 WARN L539 Checker$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 08:45:32,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:45:34,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:45:36,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:45:38,825 WARN L539 Checker$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 08:45:40,845 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 08:45:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:48,872 INFO L93 Difference]: Finished difference Result 51005 states and 76067 transitions. [2022-11-19 08:45:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:45:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 304 [2022-11-19 08:45:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:49,143 INFO L225 Difference]: With dead ends: 51005 [2022-11-19 08:45:49,143 INFO L226 Difference]: Without dead ends: 25558 [2022-11-19 08:45:49,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:45:49,265 INFO L413 NwaCegarLoop]: 2886 mSDtfsCounter, 11 mSDsluCounter, 5760 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8646 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:49,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8646 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1249 Invalid, 5 Unknown, 0 Unchecked, 28.4s Time] [2022-11-19 08:45:49,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25558 states. [2022-11-19 08:45:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25558 to 25486. [2022-11-19 08:45:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25486 states, 15512 states have (on average 1.2919030428055698) internal successors, (20040), 16033 states have internal predecessors, (20040), 7902 states have call successors, (7902), 1970 states have call predecessors, (7902), 2071 states have return successors, (9385), 7820 states have call predecessors, (9385), 7899 states have call successors, (9385) [2022-11-19 08:45:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25486 states to 25486 states and 37327 transitions. [2022-11-19 08:45:50,861 INFO L78 Accepts]: Start accepts. Automaton has 25486 states and 37327 transitions. Word has length 304 [2022-11-19 08:45:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:45:50,862 INFO L495 AbstractCegarLoop]: Abstraction has 25486 states and 37327 transitions. [2022-11-19 08:45:50,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-19 08:45:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 25486 states and 37327 transitions. [2022-11-19 08:45:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-11-19 08:45:50,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:45:50,904 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:45:50,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:45:51,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 08:45:51,105 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:45:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:45:51,105 INFO L85 PathProgramCache]: Analyzing trace with hash 555087728, now seen corresponding path program 1 times [2022-11-19 08:45:51,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:45:51,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502218772] [2022-11-19 08:45:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:51,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:45:51,471 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:45:51,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573412312] [2022-11-19 08:45:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:45:51,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:45:51,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:45:51,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:45:51,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:45:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:45:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 10069 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:45:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:45:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-19 08:45:56,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:45:56,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:45:56,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502218772] [2022-11-19 08:45:56,657 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:45:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573412312] [2022-11-19 08:45:56,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573412312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:45:56,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:45:56,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:45:56,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165184982] [2022-11-19 08:45:56,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:45:56,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:45:56,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:45:56,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:45:56,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:45:56,662 INFO L87 Difference]: Start difference. First operand 25486 states and 37327 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-19 08:45:58,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:03,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:05,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:46:07,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:11,276 WARN L539 Checker$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 08:46:12,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:14,772 WARN L539 Checker$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 08:46:18,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:46:23,184 INFO L93 Difference]: Finished difference Result 51095 states and 76178 transitions. [2022-11-19 08:46:23,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:46:23,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 343 [2022-11-19 08:46:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:46:23,354 INFO L225 Difference]: With dead ends: 51095 [2022-11-19 08:46:23,354 INFO L226 Difference]: Without dead ends: 25616 [2022-11-19 08:46:23,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:46:23,500 INFO L413 NwaCegarLoop]: 2884 mSDtfsCounter, 15 mSDsluCounter, 5760 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8644 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:46:23,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8644 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1246 Invalid, 5 Unknown, 0 Unchecked, 24.9s Time] [2022-11-19 08:46:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25616 states. [2022-11-19 08:46:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25616 to 25512. [2022-11-19 08:46:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25512 states, 15538 states have (on average 1.2914145964731625) internal successors, (20066), 16059 states have internal predecessors, (20066), 7902 states have call successors, (7902), 1970 states have call predecessors, (7902), 2071 states have return successors, (9385), 7820 states have call predecessors, (9385), 7899 states have call successors, (9385) [2022-11-19 08:46:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25512 states to 25512 states and 37353 transitions. [2022-11-19 08:46:25,056 INFO L78 Accepts]: Start accepts. Automaton has 25512 states and 37353 transitions. Word has length 343 [2022-11-19 08:46:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:46:25,057 INFO L495 AbstractCegarLoop]: Abstraction has 25512 states and 37353 transitions. [2022-11-19 08:46:25,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 2 states have call successors, (59), 2 states have call predecessors, (59), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-19 08:46:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 25512 states and 37353 transitions. [2022-11-19 08:46:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-19 08:46:25,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:46:25,103 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:46:25,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 08:46:25,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:46:25,305 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:46:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:46:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1960508828, now seen corresponding path program 1 times [2022-11-19 08:46:25,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:46:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294041722] [2022-11-19 08:46:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:46:25,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:46:25,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:46:25,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569795480] [2022-11-19 08:46:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:46:25,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:46:25,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:46:25,648 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:46:25,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:46:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:46:31,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 10274 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:46:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:46:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-19 08:46:32,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:46:32,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:46:32,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294041722] [2022-11-19 08:46:32,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:46:32,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569795480] [2022-11-19 08:46:32,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569795480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:46:32,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:46:32,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:46:32,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758846678] [2022-11-19 08:46:32,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:46:32,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:46:32,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:46:32,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:46:32,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:46:32,496 INFO L87 Difference]: Start difference. First operand 25512 states and 37353 transitions. Second operand has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (61), 4 states have call predecessors, (61), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2022-11-19 08:46:40,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:46:42,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:51,491 WARN L539 Checker$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 08:46:53,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:47:08,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:47:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:47:13,387 INFO L93 Difference]: Finished difference Result 35176 states and 52129 transitions. [2022-11-19 08:47:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:47:13,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (61), 4 states have call predecessors, (61), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) Word has length 366 [2022-11-19 08:47:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:47:13,640 INFO L225 Difference]: With dead ends: 35176 [2022-11-19 08:47:13,641 INFO L226 Difference]: Without dead ends: 35167 [2022-11-19 08:47:13,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:47:13,677 INFO L413 NwaCegarLoop]: 1436 mSDtfsCounter, 4961 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 6160 mSolverCounterSat, 2510 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5716 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 8674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2510 IncrementalHoareTripleChecker+Valid, 6160 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:47:13,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5716 Valid, 2985 Invalid, 8674 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2510 Valid, 6160 Invalid, 4 Unknown, 0 Unchecked, 38.4s Time] [2022-11-19 08:47:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35167 states. [2022-11-19 08:47:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35167 to 35111. [2022-11-19 08:47:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35111 states, 21514 states have (on average 1.2915310960304918) internal successors, (27786), 22254 states have internal predecessors, (27786), 10847 states have call successors, (10847), 2524 states have call predecessors, (10847), 2749 states have return successors, (13398), 10838 states have call predecessors, (13398), 10844 states have call successors, (13398) [2022-11-19 08:47:15,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35111 states to 35111 states and 52031 transitions. [2022-11-19 08:47:15,986 INFO L78 Accepts]: Start accepts. Automaton has 35111 states and 52031 transitions. Word has length 366 [2022-11-19 08:47:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:47:15,987 INFO L495 AbstractCegarLoop]: Abstraction has 35111 states and 52031 transitions. [2022-11-19 08:47:15,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 4 states have call successors, (61), 4 states have call predecessors, (61), 3 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2022-11-19 08:47:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 35111 states and 52031 transitions. [2022-11-19 08:47:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2022-11-19 08:47:16,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:47:16,051 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:47:16,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-19 08:47:16,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:47:16,252 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:47:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:47:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash -468135797, now seen corresponding path program 1 times [2022-11-19 08:47:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:47:16,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225913809] [2022-11-19 08:47:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:47:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:47:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:47:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2022-11-19 08:47:18,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:47:18,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225913809] [2022-11-19 08:47:18,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225913809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:47:18,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:47:18,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:47:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517525973] [2022-11-19 08:47:18,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:47:18,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:47:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:47:18,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:47:18,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:47:18,168 INFO L87 Difference]: Start difference. First operand 35111 states and 52031 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (74), 2 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) [2022-11-19 08:47:24,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:47:26,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:47:30,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:47:32,885 WARN L539 Checker$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 08:47:35,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:47:37,625 WARN L539 Checker$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 08:47:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:47:45,676 INFO L93 Difference]: Finished difference Result 70435 states and 107156 transitions. [2022-11-19 08:47:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:47:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (74), 2 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) Word has length 463 [2022-11-19 08:47:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:47:45,955 INFO L225 Difference]: With dead ends: 70435 [2022-11-19 08:47:45,956 INFO L226 Difference]: Without dead ends: 35331 [2022-11-19 08:47:46,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:47:46,373 INFO L413 NwaCegarLoop]: 2887 mSDtfsCounter, 14 mSDsluCounter, 5737 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 8624 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:47:46,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 8624 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1259 Invalid, 5 Unknown, 0 Unchecked, 25.2s Time] [2022-11-19 08:47:46,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35331 states. [2022-11-19 08:47:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35331 to 35331. [2022-11-19 08:47:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35331 states, 21654 states have (on average 1.2905698716172531) internal successors, (27946), 22394 states have internal predecessors, (27946), 10907 states have call successors, (10907), 2544 states have call predecessors, (10907), 2769 states have return successors, (13478), 10898 states have call predecessors, (13478), 10904 states have call successors, (13478) [2022-11-19 08:47:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35331 states to 35331 states and 52331 transitions. [2022-11-19 08:47:49,060 INFO L78 Accepts]: Start accepts. Automaton has 35331 states and 52331 transitions. Word has length 463 [2022-11-19 08:47:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:47:49,061 INFO L495 AbstractCegarLoop]: Abstraction has 35331 states and 52331 transitions. [2022-11-19 08:47:49,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 3 states have call successors, (74), 2 states have call predecessors, (74), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) [2022-11-19 08:47:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 35331 states and 52331 transitions. [2022-11-19 08:47:49,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-11-19 08:47:49,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:47:49,152 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:47:49,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 08:47:49,153 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:47:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:47:49,154 INFO L85 PathProgramCache]: Analyzing trace with hash 724348495, now seen corresponding path program 1 times [2022-11-19 08:47:49,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:47:49,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66694654] [2022-11-19 08:47:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:47:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:47:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:47:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-11-19 08:47:51,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:47:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66694654] [2022-11-19 08:47:51,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66694654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:47:51,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384715640] [2022-11-19 08:47:51,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:47:51,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:47:51,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:47:51,457 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:47:51,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 08:47:56,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:47:56,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 10869 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:47:56,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:47:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-11-19 08:47:57,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:47:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-19 08:47:59,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384715640] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:47:59,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:47:59,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2022-11-19 08:47:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261945484] [2022-11-19 08:47:59,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:47:59,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:47:59,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:47:59,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:47:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:47:59,665 INFO L87 Difference]: Start difference. First operand 35331 states and 52331 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 4 states have call successors, (75), 4 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2022-11-19 08:48:05,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:07,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:48:16,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:21,019 WARN L539 Checker$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 08:48:22,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:27,657 WARN L539 Checker$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 08:48:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:48:33,442 INFO L93 Difference]: Finished difference Result 37760 states and 56004 transitions. [2022-11-19 08:48:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:48:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 4 states have call successors, (75), 4 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) Word has length 468 [2022-11-19 08:48:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:48:33,668 INFO L225 Difference]: With dead ends: 37760 [2022-11-19 08:48:33,668 INFO L226 Difference]: Without dead ends: 37737 [2022-11-19 08:48:33,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 933 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:48:33,689 INFO L413 NwaCegarLoop]: 3118 mSDtfsCounter, 6164 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 1667 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6662 SdHoareTripleChecker+Valid, 4132 SdHoareTripleChecker+Invalid, 5488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1667 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:48:33,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6662 Valid, 4132 Invalid, 5488 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1667 Valid, 3817 Invalid, 4 Unknown, 0 Unchecked, 31.4s Time] [2022-11-19 08:48:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37737 states. [2022-11-19 08:48:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37737 to 37577. [2022-11-19 08:48:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37577 states, 23038 states have (on average 1.2901293515062071) internal successors, (29722), 23855 states have internal predecessors, (29722), 11580 states have call successors, (11580), 2672 states have call predecessors, (11580), 2958 states have return successors, (14429), 11623 states have call predecessors, (14429), 11577 states have call successors, (14429) [2022-11-19 08:48:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37577 states to 37577 states and 55731 transitions. [2022-11-19 08:48:36,213 INFO L78 Accepts]: Start accepts. Automaton has 37577 states and 55731 transitions. Word has length 468 [2022-11-19 08:48:36,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:48:36,213 INFO L495 AbstractCegarLoop]: Abstraction has 37577 states and 55731 transitions. [2022-11-19 08:48:36,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 4 states have call successors, (75), 4 states have call predecessors, (75), 3 states have return successors, (71), 3 states have call predecessors, (71), 3 states have call successors, (71) [2022-11-19 08:48:36,214 INFO L276 IsEmpty]: Start isEmpty. Operand 37577 states and 55731 transitions. [2022-11-19 08:48:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-11-19 08:48:36,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:48:36,321 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:48:36,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:48:36,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 08:48:36,522 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:48:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:48:36,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1275363377, now seen corresponding path program 1 times [2022-11-19 08:48:36,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:48:36,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815662607] [2022-11-19 08:48:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:48:36,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:48:37,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:48:37,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588637288] [2022-11-19 08:48:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:48:37,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:48:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:48:37,066 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:48:37,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_680bc491-de9e-4aa9-a50e-72c14e275ce8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 08:48:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:48:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 11178 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-19 08:48:42,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:48:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 90 proven. 6 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-19 08:48:44,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:48:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-11-19 08:48:46,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:48:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815662607] [2022-11-19 08:48:46,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:48:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588637288] [2022-11-19 08:48:46,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588637288] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:48:46,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:48:46,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-19 08:48:46,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904052077] [2022-11-19 08:48:46,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:48:46,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:48:46,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:48:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:48:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:48:46,022 INFO L87 Difference]: Start difference. First operand 37577 states and 55731 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 4 states have call successors, (71), 4 states have call predecessors, (71), 3 states have return successors, (63), 3 states have call predecessors, (63), 3 states have call successors, (63) [2022-11-19 08:48:50,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:48:52,630 WARN L539 Checker$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 08:48:58,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:49:02,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []