./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:55:37,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:55:37,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:55:37,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:55:37,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:55:37,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:55:37,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:55:37,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:55:37,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:55:37,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:55:37,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:55:37,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:55:37,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:55:37,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:55:37,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:55:37,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:55:37,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:55:37,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:55:37,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:55:37,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:55:37,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:55:37,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:55:37,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:55:37,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:55:37,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:55:37,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:55:37,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:55:37,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:55:37,199 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:55:37,200 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:55:37,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:55:37,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:55:37,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:55:37,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:55:37,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:55:37,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:55:37,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:55:37,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:55:37,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:55:37,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:55:37,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:55:37,212 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 13:55:37,244 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:55:37,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:55:37,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:55:37,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:55:37,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:55:37,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:55:37,246 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:55:37,247 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:55:37,247 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:55:37,247 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:55:37,248 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:55:37,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:55:37,249 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:55:37,249 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:55:37,249 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:55:37,249 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:55:37,249 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:55:37,250 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:55:37,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:55:37,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:55:37,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:55:37,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:55:37,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:55:37,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:55:37,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:55:37,252 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:55:37,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:55:37,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:55:37,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:55:37,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:55:37,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:55:37,254 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:55:37,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:55:37,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:55:37,255 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:55:37,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:55:37,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:55:37,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:55:37,256 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_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cfba800a850f13ff72fddf9946e31aec208a19aa4b82d402046e12670b66199 [2022-11-23 13:55:37,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:55:37,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:55:37,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:55:37,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:55:37,602 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:55:37,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2022-11-23 13:55:40,671 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:55:41,246 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:55:41,247 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2022-11-23 13:55:41,299 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/data/94835c46b/cab777a170c14d5f9fe185ba1a58a5c1/FLAGa4634fe07 [2022-11-23 13:55:41,317 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/data/94835c46b/cab777a170c14d5f9fe185ba1a58a5c1 [2022-11-23 13:55:41,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:55:41,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:55:41,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:55:41,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:55:41,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:55:41,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:41" (1/1) ... [2022-11-23 13:55:41,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ca5b762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:41, skipping insertion in model container [2022-11-23 13:55:41,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:41" (1/1) ... [2022-11-23 13:55:41,344 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:55:41,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:55:43,372 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2022-11-23 13:55:43,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:55:43,620 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:55:44,113 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i[277952,277965] [2022-11-23 13:55:44,149 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:55:44,234 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:55:44,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44 WrapperNode [2022-11-23 13:55:44,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:55:44,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:55:44,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:55:44,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:55:44,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,349 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,581 INFO L138 Inliner]: procedures = 258, calls = 2276, calls flagged for inlining = 96, calls inlined = 93, statements flattened = 5946 [2022-11-23 13:55:44,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:55:44,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:55:44,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:55:44,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:55:44,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,799 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:55:44,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:55:44,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:55:44,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:55:44,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (1/1) ... [2022-11-23 13:55:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:55:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:55:44,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:55:44,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:55:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 13:55:44,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 13:55:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 13:55:44,924 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 13:55:44,924 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~X~~dma_addr_t~0~TO~VOID [2022-11-23 13:55:44,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~X~~dma_addr_t~0~TO~VOID [2022-11-23 13:55:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion_timeout [2022-11-23 13:55:44,925 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion_timeout [2022-11-23 13:55:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mpctl_mutex [2022-11-23 13:55:44,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mpctl_mutex [2022-11-23 13:55:44,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 13:55:44,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 13:55:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_GetIocState [2022-11-23 13:55:44,926 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_GetIocState [2022-11-23 13:55:44,926 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_trylock [2022-11-23 13:55:44,926 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_trylock [2022-11-23 13:55:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure __scsi_iterate_devices [2022-11-23 13:55:44,927 INFO L138 BoogieDeclarations]: Found implementation of procedure __scsi_iterate_devices [2022-11-23 13:55:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 13:55:44,927 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 13:55:44,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 13:55:44,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 13:55:44,928 INFO L130 BoogieDeclarations]: Found specification of procedure mptctl_syscall_down [2022-11-23 13:55:44,928 INFO L138 BoogieDeclarations]: Found implementation of procedure mptctl_syscall_down [2022-11-23 13:55:44,928 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_device_driver_deregister [2022-11-23 13:55:44,929 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_device_driver_deregister [2022-11-23 13:55:44,930 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-23 13:55:44,930 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-23 13:55:44,930 INFO L130 BoogieDeclarations]: Found specification of procedure mptctl_remove [2022-11-23 13:55:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure mptctl_remove [2022-11-23 13:55:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 13:55:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 13:55:44,931 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 13:55:44,931 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 13:55:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_put_msg_frame [2022-11-23 13:55:44,932 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_put_msg_frame [2022-11-23 13:55:44,932 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-23 13:55:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-23 13:55:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-23 13:55:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-23 13:55:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 13:55:44,933 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 13:55:44,933 INFO L130 BoogieDeclarations]: Found specification of procedure __mptctl_ioctl [2022-11-23 13:55:44,934 INFO L138 BoogieDeclarations]: Found implementation of procedure __mptctl_ioctl [2022-11-23 13:55:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure mptctl_do_mpt_command [2022-11-23 13:55:44,934 INFO L138 BoogieDeclarations]: Found implementation of procedure mptctl_do_mpt_command [2022-11-23 13:55:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure mptctl_do_fw_download [2022-11-23 13:55:44,934 INFO L138 BoogieDeclarations]: Found implementation of procedure mptctl_do_fw_download [2022-11-23 13:55:44,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:55:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 13:55:44,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of__MPT_MGMT [2022-11-23 13:55:44,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of__MPT_MGMT [2022-11-23 13:55:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_put_msg_frame_hi_pri [2022-11-23 13:55:44,936 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_put_msg_frame_hi_pri [2022-11-23 13:55:44,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 13:55:44,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 13:55:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 13:55:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 13:55:44,937 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_free_fw_memory [2022-11-23 13:55:44,937 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_free_fw_memory [2022-11-23 13:55:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure mptctl_do_taskmgmt [2022-11-23 13:55:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure mptctl_do_taskmgmt [2022-11-23 13:55:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-23 13:55:44,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-23 13:55:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:55:44,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 13:55:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_clear_taskmgmt_in_progress_flag [2022-11-23 13:55:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_clear_taskmgmt_in_progress_flag [2022-11-23 13:55:44,939 INFO L130 BoogieDeclarations]: Found specification of procedure mptctl_timeout_expired [2022-11-23 13:55:44,939 INFO L138 BoogieDeclarations]: Found implementation of procedure mptctl_timeout_expired [2022-11-23 13:55:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-23 13:55:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-23 13:55:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 13:55:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 13:55:44,940 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-23 13:55:44,940 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-23 13:55:44,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mpctl_mutex [2022-11-23 13:55:44,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mpctl_mutex [2022-11-23 13:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure mptctl_fasync [2022-11-23 13:55:44,942 INFO L138 BoogieDeclarations]: Found implementation of procedure mptctl_fasync [2022-11-23 13:55:44,942 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-23 13:55:44,942 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-23 13:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2022-11-23 13:55:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2022-11-23 13:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:55:44,943 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_set_taskmgmt_in_progress_flag [2022-11-23 13:55:44,943 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_set_taskmgmt_in_progress_flag [2022-11-23 13:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-23 13:55:44,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-23 13:55:44,944 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_verify_adapter [2022-11-23 13:55:44,944 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_verify_adapter [2022-11-23 13:55:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 13:55:44,945 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 13:55:44,945 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-23 13:55:44,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-23 13:55:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:55:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 13:55:44,946 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 13:55:44,946 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_deregister [2022-11-23 13:55:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_deregister [2022-11-23 13:55:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_sgl [2022-11-23 13:55:44,947 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_sgl [2022-11-23 13:55:44,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 13:55:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 13:55:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 13:55:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 13:55:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:55:44,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 13:55:44,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 13:55:44,949 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-23 13:55:44,950 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-23 13:55:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:55:44,952 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 13:55:44,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 13:55:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 13:55:44,953 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_get_msg_frame [2022-11-23 13:55:44,954 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_get_msg_frame [2022-11-23 13:55:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-23 13:55:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-23 13:55:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of__MPT_MGMT [2022-11-23 13:55:44,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of__MPT_MGMT [2022-11-23 13:55:44,961 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_send_handshake_request [2022-11-23 13:55:44,961 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_send_handshake_request [2022-11-23 13:55:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_register [2022-11-23 13:55:44,962 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_register [2022-11-23 13:55:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_trylock_mutex_of__MPT_MGMT [2022-11-23 13:55:44,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_trylock_mutex_of__MPT_MGMT [2022-11-23 13:55:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure shost_priv [2022-11-23 13:55:44,962 INFO L138 BoogieDeclarations]: Found implementation of procedure shost_priv [2022-11-23 13:55:44,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:55:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-11-23 13:55:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:55:44,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:55:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_config [2022-11-23 13:55:44,963 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_config [2022-11-23 13:55:44,963 INFO L130 BoogieDeclarations]: Found specification of procedure mpt_free_msg_frame [2022-11-23 13:55:44,963 INFO L138 BoogieDeclarations]: Found implementation of procedure mpt_free_msg_frame [2022-11-23 13:55:44,964 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 13:55:44,964 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 13:55:45,939 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:55:45,943 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:55:49,085 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 13:55:57,698 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:55:59,677 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:55:59,677 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 13:55:59,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:59 BoogieIcfgContainer [2022-11-23 13:55:59,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:55:59,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:55:59,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:55:59,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:55:59,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:55:41" (1/3) ... [2022-11-23 13:55:59,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fed0cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:59, skipping insertion in model container [2022-11-23 13:55:59,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:44" (2/3) ... [2022-11-23 13:55:59,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fed0cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:59, skipping insertion in model container [2022-11-23 13:55:59,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:59" (3/3) ... [2022-11-23 13:55:59,693 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--message--fusion--mptctl.ko-entry_point.cil.out.i [2022-11-23 13:55:59,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:55:59,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:55:59,800 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:55:59,809 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;@6b7dae11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:55:59,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:55:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 914 states, 583 states have (on average 1.3893653516295026) internal successors, (810), 603 states have internal predecessors, (810), 267 states have call successors, (267), 63 states have call predecessors, (267), 62 states have return successors, (263), 262 states have call predecessors, (263), 263 states have call successors, (263) [2022-11-23 13:55:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-23 13:55:59,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:55:59,835 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:55:59,836 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:55:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:55:59,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1680427036, now seen corresponding path program 1 times [2022-11-23 13:55:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:55:59,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916210174] [2022-11-23 13:55:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:55:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-23 13:56:00,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:00,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916210174] [2022-11-23 13:56:00,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916210174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:00,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:00,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135461950] [2022-11-23 13:56:00,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:00,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:00,668 INFO L87 Difference]: Start difference. First operand has 914 states, 583 states have (on average 1.3893653516295026) internal successors, (810), 603 states have internal predecessors, (810), 267 states have call successors, (267), 63 states have call predecessors, (267), 62 states have return successors, (263), 262 states have call predecessors, (263), 263 states have call successors, (263) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 13:56:01,757 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 [] [2022-11-23 13:56:03,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:05,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:07,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:09,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:11,607 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 [] [2022-11-23 13:56:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:13,156 INFO L93 Difference]: Finished difference Result 1889 states and 2797 transitions. [2022-11-23 13:56:13,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:56:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 97 [2022-11-23 13:56:13,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:13,179 INFO L225 Difference]: With dead ends: 1889 [2022-11-23 13:56:13,180 INFO L226 Difference]: Without dead ends: 983 [2022-11-23 13:56:13,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:13,193 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 137 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 2281 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:13,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 2281 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 359 Invalid, 2 Unknown, 0 Unchecked, 12.3s Time] [2022-11-23 13:56:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-23 13:56:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 969. [2022-11-23 13:56:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 623 states have (on average 1.377207062600321) internal successors, (858), 638 states have internal predecessors, (858), 273 states have call successors, (273), 73 states have call predecessors, (273), 72 states have return successors, (262), 260 states have call predecessors, (262), 262 states have call successors, (262) [2022-11-23 13:56:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1393 transitions. [2022-11-23 13:56:13,314 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1393 transitions. Word has length 97 [2022-11-23 13:56:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:13,315 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1393 transitions. [2022-11-23 13:56:13,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 13:56:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1393 transitions. [2022-11-23 13:56:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-23 13:56:13,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:13,319 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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] [2022-11-23 13:56:13,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:56:13,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:13,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1974877296, now seen corresponding path program 1 times [2022-11-23 13:56:13,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:13,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286596098] [2022-11-23 13:56:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:13,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:13,700 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-23 13:56:13,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:13,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286596098] [2022-11-23 13:56:13,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286596098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:13,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:13,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:13,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570942219] [2022-11-23 13:56:13,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:13,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:13,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:13,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:13,704 INFO L87 Difference]: Start difference. First operand 969 states and 1393 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 13:56:15,005 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 [] [2022-11-23 13:56:17,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:19,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:21,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:24,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:25,636 INFO L93 Difference]: Finished difference Result 2691 states and 3888 transitions. [2022-11-23 13:56:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:56:25,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 109 [2022-11-23 13:56:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:25,650 INFO L225 Difference]: With dead ends: 2691 [2022-11-23 13:56:25,651 INFO L226 Difference]: Without dead ends: 1756 [2022-11-23 13:56:25,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:25,657 INFO L413 NwaCegarLoop]: 1586 mSDtfsCounter, 1135 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 2686 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:25,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 2686 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 399 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2022-11-23 13:56:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-11-23 13:56:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1744. [2022-11-23 13:56:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1140 states have (on average 1.3859649122807018) internal successors, (1580), 1158 states have internal predecessors, (1580), 475 states have call successors, (475), 129 states have call predecessors, (475), 128 states have return successors, (466), 462 states have call predecessors, (466), 464 states have call successors, (466) [2022-11-23 13:56:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2521 transitions. [2022-11-23 13:56:25,778 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2521 transitions. Word has length 109 [2022-11-23 13:56:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:25,779 INFO L495 AbstractCegarLoop]: Abstraction has 1744 states and 2521 transitions. [2022-11-23 13:56:25,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-23 13:56:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2521 transitions. [2022-11-23 13:56:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-23 13:56:25,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:25,783 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:25,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:56:25,784 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:25,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:25,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1312150063, now seen corresponding path program 1 times [2022-11-23 13:56:25,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:25,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123405402] [2022-11-23 13:56:25,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:25,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-23 13:56:26,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:26,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123405402] [2022-11-23 13:56:26,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123405402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:26,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:26,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:26,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127929886] [2022-11-23 13:56:26,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:26,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:26,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:26,133 INFO L87 Difference]: Start difference. First operand 1744 states and 2521 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:56:27,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:28,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:30,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:32,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:35,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:36,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:36,721 INFO L93 Difference]: Finished difference Result 2065 states and 2888 transitions. [2022-11-23 13:56:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:56:36,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2022-11-23 13:56:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:36,733 INFO L225 Difference]: With dead ends: 2065 [2022-11-23 13:56:36,733 INFO L226 Difference]: Without dead ends: 2062 [2022-11-23 13:56:36,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:36,736 INFO L413 NwaCegarLoop]: 1252 mSDtfsCounter, 1012 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:36,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 1635 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 13:56:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-11-23 13:56:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 2054. [2022-11-23 13:56:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 1309 states have (on average 1.3628724216959511) internal successors, (1784), 1335 states have internal predecessors, (1784), 549 states have call successors, (549), 195 states have call predecessors, (549), 195 states have return successors, (543), 535 states have call predecessors, (543), 539 states have call successors, (543) [2022-11-23 13:56:36,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2876 transitions. [2022-11-23 13:56:36,840 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2876 transitions. Word has length 128 [2022-11-23 13:56:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:36,840 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 2876 transitions. [2022-11-23 13:56:36,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:56:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2876 transitions. [2022-11-23 13:56:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-23 13:56:36,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:36,843 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:36,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:56:36,844 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2023218333, now seen corresponding path program 1 times [2022-11-23 13:56:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767787435] [2022-11-23 13:56:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:36,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-23 13:56:37,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767787435] [2022-11-23 13:56:37,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767787435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:37,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:37,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829492182] [2022-11-23 13:56:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:37,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:37,145 INFO L87 Difference]: Start difference. First operand 2054 states and 2876 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:56:38,249 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 [] [2022-11-23 13:56:40,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:42,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:44,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:47,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:48,086 INFO L93 Difference]: Finished difference Result 2064 states and 2886 transitions. [2022-11-23 13:56:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:56:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2022-11-23 13:56:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:48,101 INFO L225 Difference]: With dead ends: 2064 [2022-11-23 13:56:48,101 INFO L226 Difference]: Without dead ends: 2061 [2022-11-23 13:56:48,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:48,108 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 1009 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:48,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 1633 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 10.8s Time] [2022-11-23 13:56:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-11-23 13:56:48,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 2053. [2022-11-23 13:56:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 1309 states have (on average 1.3621084797555385) internal successors, (1783), 1334 states have internal predecessors, (1783), 548 states have call successors, (548), 195 states have call predecessors, (548), 195 states have return successors, (543), 535 states have call predecessors, (543), 539 states have call successors, (543) [2022-11-23 13:56:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2874 transitions. [2022-11-23 13:56:48,247 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2874 transitions. Word has length 129 [2022-11-23 13:56:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:48,248 INFO L495 AbstractCegarLoop]: Abstraction has 2053 states and 2874 transitions. [2022-11-23 13:56:48,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:56:48,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2874 transitions. [2022-11-23 13:56:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-23 13:56:48,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:48,251 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:56:48,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:56:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1703473940, now seen corresponding path program 1 times [2022-11-23 13:56:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:48,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309347086] [2022-11-23 13:56:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:48,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-23 13:56:48,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:48,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309347086] [2022-11-23 13:56:48,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309347086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:48,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:48,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471943326] [2022-11-23 13:56:48,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:48,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:48,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:48,507 INFO L87 Difference]: Start difference. First operand 2053 states and 2874 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:56:49,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:51,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:52,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:54,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:56,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:56:59,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:00,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:00,045 INFO L93 Difference]: Finished difference Result 2079 states and 2896 transitions. [2022-11-23 13:57:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:57:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 130 [2022-11-23 13:57:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:00,056 INFO L225 Difference]: With dead ends: 2079 [2022-11-23 13:57:00,056 INFO L226 Difference]: Without dead ends: 2075 [2022-11-23 13:57:00,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:00,058 INFO L413 NwaCegarLoop]: 1131 mSDtfsCounter, 167 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:00,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 2098 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2022-11-23 13:57:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-11-23 13:57:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2073. [2022-11-23 13:57:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1320 states have (on average 1.3575757575757577) internal successors, (1792), 1343 states have internal predecessors, (1792), 550 states have call successors, (550), 202 states have call predecessors, (550), 202 states have return successors, (547), 539 states have call predecessors, (547), 543 states have call successors, (547) [2022-11-23 13:57:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2889 transitions. [2022-11-23 13:57:00,193 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2889 transitions. Word has length 130 [2022-11-23 13:57:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:00,195 INFO L495 AbstractCegarLoop]: Abstraction has 2073 states and 2889 transitions. [2022-11-23 13:57:00,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:57:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2889 transitions. [2022-11-23 13:57:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-23 13:57:00,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:00,198 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:00,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:57:00,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1266822278, now seen corresponding path program 1 times [2022-11-23 13:57:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115447910] [2022-11-23 13:57:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:00,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-23 13:57:00,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:00,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115447910] [2022-11-23 13:57:00,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115447910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:00,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:00,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:57:00,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570058277] [2022-11-23 13:57:00,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:00,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:57:00,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:57:00,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:00,440 INFO L87 Difference]: Start difference. First operand 2073 states and 2889 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:57:01,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:04,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:06,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:09,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:11,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:12,484 INFO L93 Difference]: Finished difference Result 5126 states and 7173 transitions. [2022-11-23 13:57:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:57:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2022-11-23 13:57:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:12,502 INFO L225 Difference]: With dead ends: 5126 [2022-11-23 13:57:12,502 INFO L226 Difference]: Without dead ends: 3087 [2022-11-23 13:57:12,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:12,512 INFO L413 NwaCegarLoop]: 1384 mSDtfsCounter, 701 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:12,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 2428 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 371 Invalid, 4 Unknown, 0 Unchecked, 11.9s Time] [2022-11-23 13:57:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2022-11-23 13:57:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 3069. [2022-11-23 13:57:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 1976 states have (on average 1.354251012145749) internal successors, (2676), 2015 states have internal predecessors, (2676), 788 states have call successors, (788), 306 states have call predecessors, (788), 304 states have return successors, (814), 763 states have call predecessors, (814), 778 states have call successors, (814) [2022-11-23 13:57:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 4278 transitions. [2022-11-23 13:57:12,715 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 4278 transitions. Word has length 131 [2022-11-23 13:57:12,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:12,716 INFO L495 AbstractCegarLoop]: Abstraction has 3069 states and 4278 transitions. [2022-11-23 13:57:12,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:57:12,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 4278 transitions. [2022-11-23 13:57:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-23 13:57:12,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:12,720 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:12,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:57:12,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash 615527511, now seen corresponding path program 1 times [2022-11-23 13:57:12,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:12,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67074128] [2022-11-23 13:57:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:12,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-23 13:57:12,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67074128] [2022-11-23 13:57:12,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67074128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:12,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:12,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:57:12,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470925317] [2022-11-23 13:57:12,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:12,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:57:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:12,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:57:12,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:12,939 INFO L87 Difference]: Start difference. First operand 3069 states and 4278 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:57:14,083 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 [] [2022-11-23 13:57:16,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:19,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:21,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:23,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:26,164 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 [] [2022-11-23 13:57:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:27,317 INFO L93 Difference]: Finished difference Result 6025 states and 8399 transitions. [2022-11-23 13:57:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:57:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2022-11-23 13:57:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:27,351 INFO L225 Difference]: With dead ends: 6025 [2022-11-23 13:57:27,351 INFO L226 Difference]: Without dead ends: 6004 [2022-11-23 13:57:27,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:27,356 INFO L413 NwaCegarLoop]: 1543 mSDtfsCounter, 1177 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1179 SdHoareTripleChecker+Valid, 2642 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:27,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1179 Valid, 2642 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 385 Invalid, 4 Unknown, 0 Unchecked, 14.2s Time] [2022-11-23 13:57:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2022-11-23 13:57:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 5986. [2022-11-23 13:57:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5986 states, 3865 states have (on average 1.3573091849935317) internal successors, (5246), 3939 states have internal predecessors, (5246), 1524 states have call successors, (1524), 599 states have call predecessors, (1524), 596 states have return successors, (1584), 1479 states have call predecessors, (1584), 1514 states have call successors, (1584) [2022-11-23 13:57:27,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5986 states to 5986 states and 8354 transitions. [2022-11-23 13:57:27,800 INFO L78 Accepts]: Start accepts. Automaton has 5986 states and 8354 transitions. Word has length 132 [2022-11-23 13:57:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:27,804 INFO L495 AbstractCegarLoop]: Abstraction has 5986 states and 8354 transitions. [2022-11-23 13:57:27,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-23 13:57:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 5986 states and 8354 transitions. [2022-11-23 13:57:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-23 13:57:27,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:27,808 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:27,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:57:27,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:27,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:27,810 INFO L85 PathProgramCache]: Analyzing trace with hash 345188901, now seen corresponding path program 1 times [2022-11-23 13:57:27,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:27,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217425042] [2022-11-23 13:57:27,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:27,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-23 13:57:28,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217425042] [2022-11-23 13:57:28,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217425042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:28,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:28,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:57:28,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723845155] [2022-11-23 13:57:28,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:28,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:57:28,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:28,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:57:28,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:28,048 INFO L87 Difference]: Start difference. First operand 5986 states and 8354 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 13:57:29,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:31,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:33,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:35,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:38,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:39,749 INFO L93 Difference]: Finished difference Result 9280 states and 12904 transitions. [2022-11-23 13:57:39,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:57:39,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 150 [2022-11-23 13:57:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:39,768 INFO L225 Difference]: With dead ends: 9280 [2022-11-23 13:57:39,768 INFO L226 Difference]: Without dead ends: 3326 [2022-11-23 13:57:39,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:57:39,792 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 11 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:39,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 2262 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 350 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2022-11-23 13:57:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2022-11-23 13:57:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 3297. [2022-11-23 13:57:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 2112 states have (on average 1.3465909090909092) internal successors, (2844), 2150 states have internal predecessors, (2844), 843 states have call successors, (843), 344 states have call predecessors, (843), 341 states have return successors, (861), 818 states have call predecessors, (861), 833 states have call successors, (861) [2022-11-23 13:57:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 4548 transitions. [2022-11-23 13:57:39,998 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 4548 transitions. Word has length 150 [2022-11-23 13:57:39,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:39,998 INFO L495 AbstractCegarLoop]: Abstraction has 3297 states and 4548 transitions. [2022-11-23 13:57:39,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 13:57:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 4548 transitions. [2022-11-23 13:57:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-23 13:57:40,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:40,002 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:40,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:57:40,002 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:57:40,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash 596364859, now seen corresponding path program 1 times [2022-11-23 13:57:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:40,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020730829] [2022-11-23 13:57:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:40,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-11-23 13:57:40,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:40,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020730829] [2022-11-23 13:57:40,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020730829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:40,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:40,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:57:40,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273607649] [2022-11-23 13:57:40,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:40,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:57:40,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:40,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:57:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:57:40,447 INFO L87 Difference]: Start difference. First operand 3297 states and 4548 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 13:57:42,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:44,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:46,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:48,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:50,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:52,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:56,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:59,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:01,228 INFO L93 Difference]: Finished difference Result 6493 states and 8968 transitions. [2022-11-23 13:58:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:58:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 155 [2022-11-23 13:58:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:01,244 INFO L225 Difference]: With dead ends: 6493 [2022-11-23 13:58:01,244 INFO L226 Difference]: Without dead ends: 3232 [2022-11-23 13:58:01,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:58:01,256 INFO L413 NwaCegarLoop]: 1135 mSDtfsCounter, 31 mSDsluCounter, 3381 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 4516 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 4516 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 703 Invalid, 5 Unknown, 0 Unchecked, 20.6s Time] [2022-11-23 13:58:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2022-11-23 13:58:01,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3191. [2022-11-23 13:58:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2056 states have (on average 1.3497081712062258) internal successors, (2775), 2094 states have internal predecessors, (2775), 815 states have call successors, (815), 322 states have call predecessors, (815), 319 states have return successors, (833), 790 states have call predecessors, (833), 805 states have call successors, (833) [2022-11-23 13:58:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 4423 transitions. [2022-11-23 13:58:01,413 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 4423 transitions. Word has length 155 [2022-11-23 13:58:01,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:01,414 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 4423 transitions. [2022-11-23 13:58:01,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 13:58:01,414 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 4423 transitions. [2022-11-23 13:58:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-23 13:58:01,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:01,417 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:01,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:58:01,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:01,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:01,422 INFO L85 PathProgramCache]: Analyzing trace with hash -559801026, now seen corresponding path program 1 times [2022-11-23 13:58:01,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:01,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841242789] [2022-11-23 13:58:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:01,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-23 13:58:01,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841242789] [2022-11-23 13:58:01,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841242789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:01,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:01,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:58:01,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73591771] [2022-11-23 13:58:01,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:01,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:58:01,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:58:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:58:01,743 INFO L87 Difference]: Start difference. First operand 3191 states and 4423 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 13:58:02,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:04,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:05,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:07,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:09,668 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 [] [2022-11-23 13:58:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:10,443 INFO L93 Difference]: Finished difference Result 3352 states and 4604 transitions. [2022-11-23 13:58:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:58:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 161 [2022-11-23 13:58:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:10,466 INFO L225 Difference]: With dead ends: 3352 [2022-11-23 13:58:10,466 INFO L226 Difference]: Without dead ends: 3349 [2022-11-23 13:58:10,468 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 [2022-11-23 13:58:10,469 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 1035 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:10,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 1535 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-23 13:58:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2022-11-23 13:58:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 3341. [2022-11-23 13:58:10,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 2139 states have (on average 1.343618513323983) internal successors, (2874), 2182 states have internal predecessors, (2874), 849 states have call successors, (849), 354 states have call predecessors, (849), 352 states have return successors, (868), 824 states have call predecessors, (868), 840 states have call successors, (868) [2022-11-23 13:58:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 4591 transitions. [2022-11-23 13:58:10,668 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 4591 transitions. Word has length 161 [2022-11-23 13:58:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:10,668 INFO L495 AbstractCegarLoop]: Abstraction has 3341 states and 4591 transitions. [2022-11-23 13:58:10,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 13:58:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 4591 transitions. [2022-11-23 13:58:10,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-23 13:58:10,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:10,673 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 13:58:10,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:58:10,674 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:10,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:10,674 INFO L85 PathProgramCache]: Analyzing trace with hash -939056655, now seen corresponding path program 1 times [2022-11-23 13:58:10,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:10,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118878981] [2022-11-23 13:58:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:10,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-23 13:58:11,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:11,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118878981] [2022-11-23 13:58:11,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118878981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:11,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:11,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:58:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364602399] [2022-11-23 13:58:11,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:58:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:11,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:58:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:58:11,333 INFO L87 Difference]: Start difference. First operand 3341 states and 4591 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 13:58:12,508 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 [] [2022-11-23 13:58:13,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:15,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:17,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:19,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:22,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:25,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:25,687 INFO L93 Difference]: Finished difference Result 6903 states and 9477 transitions. [2022-11-23 13:58:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:58:25,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 198 [2022-11-23 13:58:25,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:25,704 INFO L225 Difference]: With dead ends: 6903 [2022-11-23 13:58:25,704 INFO L226 Difference]: Without dead ends: 3622 [2022-11-23 13:58:25,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:58:25,717 INFO L413 NwaCegarLoop]: 1180 mSDtfsCounter, 128 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 8 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:25,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 2265 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 368 Invalid, 4 Unknown, 0 Unchecked, 14.2s Time] [2022-11-23 13:58:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2022-11-23 13:58:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 3569. [2022-11-23 13:58:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2323 states have (on average 1.3486870426173052) internal successors, (3133), 2366 states have internal predecessors, (3133), 869 states have call successors, (869), 378 states have call predecessors, (869), 376 states have return successors, (888), 844 states have call predecessors, (888), 860 states have call successors, (888) [2022-11-23 13:58:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4890 transitions. [2022-11-23 13:58:25,935 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4890 transitions. Word has length 198 [2022-11-23 13:58:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:25,936 INFO L495 AbstractCegarLoop]: Abstraction has 3569 states and 4890 transitions. [2022-11-23 13:58:25,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 13:58:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4890 transitions. [2022-11-23 13:58:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-23 13:58:25,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:25,941 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 13:58:25,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:58:25,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:25,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash 966507630, now seen corresponding path program 1 times [2022-11-23 13:58:25,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:25,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797830760] [2022-11-23 13:58:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-23 13:58:27,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:27,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797830760] [2022-11-23 13:58:27,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797830760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:27,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:27,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:58:27,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623666179] [2022-11-23 13:58:27,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:27,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:58:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:27,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:58:27,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:27,400 INFO L87 Difference]: Start difference. First operand 3569 states and 4890 transitions. Second operand has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 13:58:28,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:31,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:34,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:37,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:39,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:41,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:43,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:45,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:48,727 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 [] [2022-11-23 13:58:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:51,141 INFO L93 Difference]: Finished difference Result 4511 states and 6194 transitions. [2022-11-23 13:58:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:58:51,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 209 [2022-11-23 13:58:51,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:51,166 INFO L225 Difference]: With dead ends: 4511 [2022-11-23 13:58:51,166 INFO L226 Difference]: Without dead ends: 4282 [2022-11-23 13:58:51,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:58:51,170 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 1068 mSDsluCounter, 3374 mSDsCounter, 0 mSdLazyCounter, 3284 mSolverCounterSat, 534 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 4512 SdHoareTripleChecker+Invalid, 3823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 3284 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:51,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 4512 Invalid, 3823 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [534 Valid, 3284 Invalid, 5 Unknown, 0 Unchecked, 23.4s Time] [2022-11-23 13:58:51,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2022-11-23 13:58:51,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3943. [2022-11-23 13:58:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 2549 states have (on average 1.3413103177716752) internal successors, (3419), 2613 states have internal predecessors, (3419), 949 states have call successors, (949), 441 states have call predecessors, (949), 444 states have return successors, (993), 912 states have call predecessors, (993), 936 states have call successors, (993) [2022-11-23 13:58:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5361 transitions. [2022-11-23 13:58:51,428 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5361 transitions. Word has length 209 [2022-11-23 13:58:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:51,429 INFO L495 AbstractCegarLoop]: Abstraction has 3943 states and 5361 transitions. [2022-11-23 13:58:51,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 13:58:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5361 transitions. [2022-11-23 13:58:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-23 13:58:51,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:51,434 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 13:58:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 13:58:51,434 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1333151834, now seen corresponding path program 1 times [2022-11-23 13:58:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:51,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031756584] [2022-11-23 13:58:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:51,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:51,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-23 13:58:54,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031756584] [2022-11-23 13:58:54,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031756584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:58:54,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:58:54,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:58:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419606411] [2022-11-23 13:58:54,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:58:54,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:58:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:58:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:58:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:58:54,065 INFO L87 Difference]: Start difference. First operand 3943 states and 5361 transitions. Second operand has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 13:58:55,262 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 [] [2022-11-23 13:58:58,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:00,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:03,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:07,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:09,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:13,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:16,005 INFO L93 Difference]: Finished difference Result 6638 states and 9087 transitions. [2022-11-23 13:59:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:59:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) Word has length 208 [2022-11-23 13:59:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:16,020 INFO L225 Difference]: With dead ends: 6638 [2022-11-23 13:59:16,020 INFO L226 Difference]: Without dead ends: 4535 [2022-11-23 13:59:16,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:59:16,028 INFO L413 NwaCegarLoop]: 1063 mSDtfsCounter, 1081 mSDsluCounter, 4212 mSDsCounter, 0 mSdLazyCounter, 4042 mSolverCounterSat, 430 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 5275 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 4042 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:16,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 5275 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 4042 Invalid, 5 Unknown, 0 Unchecked, 21.6s Time] [2022-11-23 13:59:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2022-11-23 13:59:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 4189. [2022-11-23 13:59:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4189 states, 2706 states have (on average 1.3429416112342942) internal successors, (3634), 2774 states have internal predecessors, (3634), 1003 states have call successors, (1003), 474 states have call predecessors, (1003), 479 states have return successors, (1051), 965 states have call predecessors, (1051), 989 states have call successors, (1051) [2022-11-23 13:59:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4189 states to 4189 states and 5688 transitions. [2022-11-23 13:59:16,321 INFO L78 Accepts]: Start accepts. Automaton has 4189 states and 5688 transitions. Word has length 208 [2022-11-23 13:59:16,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:16,322 INFO L495 AbstractCegarLoop]: Abstraction has 4189 states and 5688 transitions. [2022-11-23 13:59:16,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-23 13:59:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4189 states and 5688 transitions. [2022-11-23 13:59:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-23 13:59:16,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:16,327 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 13:59:16,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 13:59:16,328 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:59:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:16,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1688489318, now seen corresponding path program 1 times [2022-11-23 13:59:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137692765] [2022-11-23 13:59:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:16,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-23 13:59:17,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:17,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137692765] [2022-11-23 13:59:17,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137692765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:17,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:17,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 13:59:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468776940] [2022-11-23 13:59:17,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:59:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:17,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:59:17,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:59:17,396 INFO L87 Difference]: Start difference. First operand 4189 states and 5688 transitions. Second operand has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-11-23 13:59:18,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:20,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:22,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:25,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:28,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:30,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:32,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:33,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:36,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:59:38,211 INFO L93 Difference]: Finished difference Result 8933 states and 12197 transitions. [2022-11-23 13:59:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:59:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 213 [2022-11-23 13:59:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:59:38,228 INFO L225 Difference]: With dead ends: 8933 [2022-11-23 13:59:38,228 INFO L226 Difference]: Without dead ends: 4804 [2022-11-23 13:59:38,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:59:38,244 INFO L413 NwaCegarLoop]: 1426 mSDtfsCounter, 1863 mSDsluCounter, 3773 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 741 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1904 SdHoareTripleChecker+Valid, 5199 SdHoareTripleChecker+Invalid, 1943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:59:38,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1904 Valid, 5199 Invalid, 1943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 1198 Invalid, 4 Unknown, 0 Unchecked, 20.5s Time] [2022-11-23 13:59:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4804 states. [2022-11-23 13:59:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4804 to 4739. [2022-11-23 13:59:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4739 states, 3076 states have (on average 1.3524057217165149) internal successors, (4160), 3148 states have internal predecessors, (4160), 1131 states have call successors, (1131), 526 states have call predecessors, (1131), 531 states have return successors, (1185), 1091 states have call predecessors, (1185), 1117 states have call successors, (1185) [2022-11-23 13:59:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4739 states to 4739 states and 6476 transitions. [2022-11-23 13:59:38,593 INFO L78 Accepts]: Start accepts. Automaton has 4739 states and 6476 transitions. Word has length 213 [2022-11-23 13:59:38,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:59:38,594 INFO L495 AbstractCegarLoop]: Abstraction has 4739 states and 6476 transitions. [2022-11-23 13:59:38,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2022-11-23 13:59:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4739 states and 6476 transitions. [2022-11-23 13:59:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-23 13:59:38,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:59:38,601 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 13:59:38,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 13:59:38,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:59:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:59:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1868328220, now seen corresponding path program 1 times [2022-11-23 13:59:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:59:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078570147] [2022-11-23 13:59:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:59:38,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:59:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:59:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-11-23 13:59:39,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:59:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078570147] [2022-11-23 13:59:39,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078570147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:39,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:59:39,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-23 13:59:39,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005749865] [2022-11-23 13:59:39,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:39,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 13:59:39,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:39,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 13:59:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 13:59:39,734 INFO L87 Difference]: Start difference. First operand 4739 states and 6476 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-23 13:59:40,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:44,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:47,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:49,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:50,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:52,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:55,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:57,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:59:59,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:01,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:04,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:07,563 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 [] [2022-11-23 14:00:10,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:10,126 INFO L93 Difference]: Finished difference Result 9617 states and 13142 transitions. [2022-11-23 14:00:10,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:00:10,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) Word has length 221 [2022-11-23 14:00:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:10,143 INFO L225 Difference]: With dead ends: 9617 [2022-11-23 14:00:10,143 INFO L226 Difference]: Without dead ends: 4938 [2022-11-23 14:00:10,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:00:10,158 INFO L413 NwaCegarLoop]: 1385 mSDtfsCounter, 2479 mSDsluCounter, 5162 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 1102 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2520 SdHoareTripleChecker+Valid, 6547 SdHoareTripleChecker+Invalid, 2738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1102 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:10,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2520 Valid, 6547 Invalid, 2738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1102 Valid, 1629 Invalid, 7 Unknown, 0 Unchecked, 30.0s Time] [2022-11-23 14:00:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-11-23 14:00:10,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4320. [2022-11-23 14:00:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4320 states, 2791 states have (on average 1.3432461483339304) internal successors, (3749), 2851 states have internal predecessors, (3749), 1024 states have call successors, (1024), 499 states have call predecessors, (1024), 504 states have return successors, (1068), 993 states have call predecessors, (1068), 1010 states have call successors, (1068) [2022-11-23 14:00:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 5841 transitions. [2022-11-23 14:00:10,439 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 5841 transitions. Word has length 221 [2022-11-23 14:00:10,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:10,440 INFO L495 AbstractCegarLoop]: Abstraction has 4320 states and 5841 transitions. [2022-11-23 14:00:10,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (30), 3 states have call predecessors, (30), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-23 14:00:10,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 5841 transitions. [2022-11-23 14:00:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-11-23 14:00:10,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:10,444 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 14:00:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:00:10,444 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:00:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash -325820944, now seen corresponding path program 1 times [2022-11-23 14:00:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:10,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805837252] [2022-11-23 14:00:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:10,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-23 14:00:11,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805837252] [2022-11-23 14:00:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805837252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:00:11,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:00:11,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 14:00:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772444545] [2022-11-23 14:00:11,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:00:11,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:00:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:00:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:00:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:00:11,674 INFO L87 Difference]: Start difference. First operand 4320 states and 5841 transitions. Second operand has 10 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 14:00:12,890 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 [] [2022-11-23 14:00:15,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:17,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:19,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:21,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:24,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:29,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:33,059 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 [] [2022-11-23 14:00:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:00:36,378 INFO L93 Difference]: Finished difference Result 4721 states and 6454 transitions. [2022-11-23 14:00:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:00:36,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) Word has length 217 [2022-11-23 14:00:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:00:36,394 INFO L225 Difference]: With dead ends: 4721 [2022-11-23 14:00:36,394 INFO L226 Difference]: Without dead ends: 4718 [2022-11-23 14:00:36,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:00:36,397 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 1489 mSDsluCounter, 4934 mSDsCounter, 0 mSdLazyCounter, 4519 mSolverCounterSat, 828 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 6072 SdHoareTripleChecker+Invalid, 5351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 4519 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:00:36,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1640 Valid, 6072 Invalid, 5351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [828 Valid, 4519 Invalid, 4 Unknown, 0 Unchecked, 24.3s Time] [2022-11-23 14:00:36,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4718 states. [2022-11-23 14:00:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4718 to 4292. [2022-11-23 14:00:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 2773 states have (on average 1.3433104940497655) internal successors, (3725), 2833 states have internal predecessors, (3725), 1017 states have call successors, (1017), 496 states have call predecessors, (1017), 501 states have return successors, (1057), 986 states have call predecessors, (1057), 1003 states have call successors, (1057) [2022-11-23 14:00:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 5799 transitions. [2022-11-23 14:00:36,678 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 5799 transitions. Word has length 217 [2022-11-23 14:00:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:00:36,678 INFO L495 AbstractCegarLoop]: Abstraction has 4292 states and 5799 transitions. [2022-11-23 14:00:36,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 14:00:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 5799 transitions. [2022-11-23 14:00:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-23 14:00:36,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:00:36,682 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 14:00:36,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:00:36,683 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:00:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:00:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash 499772968, now seen corresponding path program 1 times [2022-11-23 14:00:36,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:00:36,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415701362] [2022-11-23 14:00:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:00:36,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:00:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:00:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-11-23 14:00:39,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:00:39,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415701362] [2022-11-23 14:00:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415701362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:00:39,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:00:39,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 14:00:39,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281006221] [2022-11-23 14:00:39,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:00:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:00:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:00:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:00:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:00:39,344 INFO L87 Difference]: Start difference. First operand 4292 states and 5799 transitions. Second operand has 10 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 14:00:40,860 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 [] [2022-11-23 14:00:44,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:47,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:50,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:52,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:54,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:00:59,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:01:02,999 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 [] [2022-11-23 14:01:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:01:07,005 INFO L93 Difference]: Finished difference Result 7090 states and 9645 transitions. [2022-11-23 14:01:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:01:07,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) Word has length 216 [2022-11-23 14:01:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:01:07,019 INFO L225 Difference]: With dead ends: 7090 [2022-11-23 14:01:07,019 INFO L226 Difference]: Without dead ends: 4575 [2022-11-23 14:01:07,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:01:07,027 INFO L413 NwaCegarLoop]: 1032 mSDtfsCounter, 2304 mSDsluCounter, 4874 mSDsCounter, 0 mSdLazyCounter, 4644 mSolverCounterSat, 1153 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2462 SdHoareTripleChecker+Valid, 5906 SdHoareTripleChecker+Invalid, 5804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 4644 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:01:07,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2462 Valid, 5906 Invalid, 5804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 4644 Invalid, 7 Unknown, 0 Unchecked, 27.2s Time] [2022-11-23 14:01:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2022-11-23 14:01:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4002. [2022-11-23 14:01:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 2579 states have (on average 1.3365645599069407) internal successors, (3447), 2626 states have internal predecessors, (3447), 947 states have call successors, (947), 472 states have call predecessors, (947), 475 states have return successors, (971), 924 states have call predecessors, (971), 933 states have call successors, (971) [2022-11-23 14:01:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5365 transitions. [2022-11-23 14:01:07,321 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5365 transitions. Word has length 216 [2022-11-23 14:01:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:01:07,321 INFO L495 AbstractCegarLoop]: Abstraction has 4002 states and 5365 transitions. [2022-11-23 14:01:07,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 4 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-23 14:01:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5365 transitions. [2022-11-23 14:01:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-23 14:01:07,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:01:07,326 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 14:01:07,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:01:07,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:01:07,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:01:07,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1776724817, now seen corresponding path program 1 times [2022-11-23 14:01:07,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:01:07,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79398309] [2022-11-23 14:01:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:07,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:01:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-23 14:01:08,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:01:08,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79398309] [2022-11-23 14:01:08,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79398309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:01:08,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356737928] [2022-11-23 14:01:08,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:01:08,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:01:08,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:01:08,347 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:01:08,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50f626d6-9036-4f1d-bccd-0890b475b3d1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:01:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:01:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2772 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:01:09,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:01:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-23 14:01:10,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:01:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-11-23 14:01:11,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356737928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:01:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235424300] [2022-11-23 14:01:11,727 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-23 14:01:11,727 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:01:11,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:01:11,739 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:01:11,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:01:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:16,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:16,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:16,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:16,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:01:19,267 INFO L217 Elim1Store]: Index analysis took 3566 ms