./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI --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 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 --- 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-5e519f3 [2022-11-03 04:07:04,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:07:04,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:07:04,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:07:04,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:07:04,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:07:04,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:07:04,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:07:04,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:07:04,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:07:04,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:07:04,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:07:04,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:07:04,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:07:04,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:07:04,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:07:04,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:07:04,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:07:04,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:07:04,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:07:04,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:07:04,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:07:04,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:07:04,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:07:04,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:07:04,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:07:04,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:07:04,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:07:04,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:07:04,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:07:04,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:07:04,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:07:04,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:07:04,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:07:04,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:07:04,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:07:04,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:07:04,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:07:04,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:07:04,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:07:04,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:07:04,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 04:07:04,378 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:07:04,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:07:04,380 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:07:04,380 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:07:04,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:07:04,381 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:07:04,381 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:07:04,382 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:07:04,382 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:07:04,382 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:07:04,383 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:07:04,383 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:07:04,384 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:07:04,384 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:07:04,384 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:07:04,384 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:07:04,385 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:07:04,385 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:07:04,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:07:04,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:07:04,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:07:04,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:07:04,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:07:04,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:07:04,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:07:04,388 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:07:04,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:07:04,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:07:04,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:07:04,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:07:04,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:07:04,390 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:07:04,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:07:04,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:07:04,391 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:07:04,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:07:04,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:07:04,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:07:04,391 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_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 [2022-11-03 04:07:04,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:07:04,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:07:04,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:07:04,750 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:07:04,751 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:07:04,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2022-11-03 04:07:04,841 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/data/202774eb6/64c61384cff4437b90dea7c92241309a/FLAGd5f4492ea [2022-11-03 04:07:05,658 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:07:05,658 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2022-11-03 04:07:05,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/data/202774eb6/64c61384cff4437b90dea7c92241309a/FLAGd5f4492ea [2022-11-03 04:07:06,165 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/data/202774eb6/64c61384cff4437b90dea7c92241309a [2022-11-03 04:07:06,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:07:06,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:07:06,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:07:06,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:07:06,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:07:06,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:06" (1/1) ... [2022-11-03 04:07:06,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c500950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:06, skipping insertion in model container [2022-11-03 04:07:06,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:06" (1/1) ... [2022-11-03 04:07:06,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:07:06,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:07:07,211 WARN L230 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_35b403e2-6d21-4609-b8a3-05286f02340b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2022-11-03 04:07:07,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:07:07,593 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:07:07,765 WARN L230 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_35b403e2-6d21-4609-b8a3-05286f02340b/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i[163507,163520] [2022-11-03 04:07:07,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:07:07,930 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:07:07,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07 WrapperNode [2022-11-03 04:07:07,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:07:07,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:07:07,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:07:07,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:07:07,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:07,976 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,082 INFO L138 Inliner]: procedures = 176, calls = 448, calls flagged for inlining = 92, calls inlined = 85, statements flattened = 1769 [2022-11-03 04:07:08,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:07:08,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:07:08,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:07:08,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:07:08,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:07:08,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:07:08,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:07:08,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:07:08,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (1/1) ... [2022-11-03 04:07:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:07:08,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:08,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:07:08,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:07:08,312 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-03 04:07:08,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-03 04:07:08,312 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_15 [2022-11-03 04:07:08,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_15 [2022-11-03 04:07:08,313 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_poll [2022-11-03 04:07:08,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_poll [2022-11-03 04:07:08,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 04:07:08,313 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-03 04:07:08,314 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-03 04:07:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 04:07:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 04:07:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 04:07:08,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 04:07:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 04:07:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2022-11-03 04:07:08,315 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2022-11-03 04:07:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2022-11-03 04:07:08,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2022-11-03 04:07:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 04:07:08,315 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 04:07:08,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-03 04:07:08,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-03 04:07:08,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 04:07:08,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 04:07:08,316 INFO L130 BoogieDeclarations]: Found specification of procedure spin_trylock_bh [2022-11-03 04:07:08,316 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_trylock_bh [2022-11-03 04:07:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 04:07:08,317 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 04:07:08,317 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2022-11-03 04:07:08,317 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2022-11-03 04:07:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-03 04:07:08,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-03 04:07:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_synctty_ioctl [2022-11-03 04:07:08,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_synctty_ioctl [2022-11-03 04:07:08,318 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 04:07:08,318 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 04:07:08,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 04:07:08,319 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 04:07:08,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 04:07:08,319 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2022-11-03 04:07:08,320 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2022-11-03 04:07:08,320 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_close [2022-11-03 04:07:08,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_close [2022-11-03 04:07:08,320 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 04:07:08,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 04:07:08,354 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 04:07:08,355 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 04:07:08,355 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_print_buffer [2022-11-03 04:07:08,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_print_buffer [2022-11-03 04:07:08,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 04:07:08,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 04:07:08,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:07:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-03 04:07:08,359 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-03 04:07:08,359 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 04:07:08,359 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 04:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-03 04:07:08,360 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-03 04:07:08,360 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-03 04:07:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-03 04:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-03 04:07:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-03 04:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-11-03 04:07:08,361 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-11-03 04:07:08,361 INFO L130 BoogieDeclarations]: Found specification of procedure sp_put [2022-11-03 04:07:08,362 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_put [2022-11-03 04:07:08,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:07:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 04:07:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2022-11-03 04:07:08,363 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2022-11-03 04:07:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_hangup [2022-11-03 04:07:08,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_hangup [2022-11-03 04:07:08,363 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-03 04:07:08,364 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-03 04:07:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-03 04:07:08,364 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-03 04:07:08,364 INFO L130 BoogieDeclarations]: Found specification of procedure sp_get [2022-11-03 04:07:08,364 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_get [2022-11-03 04:07:08,365 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 04:07:08,365 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 04:07:08,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:07:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-03 04:07:08,366 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-03 04:07:08,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 04:07:08,367 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 04:07:08,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 04:07:08,367 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-03 04:07:08,368 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-03 04:07:08,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:07:08,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:07:08,369 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_push [2022-11-03 04:07:08,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_push [2022-11-03 04:07:08,939 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:07:08,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:07:09,065 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 04:07:10,593 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:07:11,185 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:07:11,185 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 04:07:11,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:11 BoogieIcfgContainer [2022-11-03 04:07:11,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:07:11,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:07:11,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:07:11,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:07:11,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:07:06" (1/3) ... [2022-11-03 04:07:11,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5080fd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:11, skipping insertion in model container [2022-11-03 04:07:11,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:07" (2/3) ... [2022-11-03 04:07:11,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5080fd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:11, skipping insertion in model container [2022-11-03 04:07:11,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:11" (3/3) ... [2022-11-03 04:07:11,199 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2022-11-03 04:07:11,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:07:11,220 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:07:11,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:07:11,288 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;@4deeea95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:07:11,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:07:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 446 states, 285 states have (on average 1.3929824561403508) internal successors, (397), 301 states have internal predecessors, (397), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) [2022-11-03 04:07:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:07:11,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:11,306 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:11,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:11,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1989573905, now seen corresponding path program 1 times [2022-11-03 04:07:11,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:11,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143571963] [2022-11-03 04:07:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 04:07:11,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143571963] [2022-11-03 04:07:11,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143571963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:11,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:11,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:07:11,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879576852] [2022-11-03 04:07:11,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:11,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:11,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:11,896 INFO L87 Difference]: Start difference. First operand has 446 states, 285 states have (on average 1.3929824561403508) internal successors, (397), 301 states have internal predecessors, (397), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 04:07:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:13,321 INFO L93 Difference]: Finished difference Result 1282 states and 1859 transitions. [2022-11-03 04:07:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:13,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 71 [2022-11-03 04:07:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:13,362 INFO L225 Difference]: With dead ends: 1282 [2022-11-03 04:07:13,362 INFO L226 Difference]: Without dead ends: 845 [2022-11-03 04:07:13,369 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 [2022-11-03 04:07:13,372 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 575 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:13,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 1187 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 04:07:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-03 04:07:13,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2022-11-03 04:07:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 549 states have (on average 1.3679417122040072) internal successors, (751), 569 states have internal predecessors, (751), 219 states have call successors, (219), 77 states have call predecessors, (219), 76 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-03 04:07:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1188 transitions. [2022-11-03 04:07:13,580 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1188 transitions. Word has length 71 [2022-11-03 04:07:13,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:13,581 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 1188 transitions. [2022-11-03 04:07:13,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 04:07:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1188 transitions. [2022-11-03 04:07:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 04:07:13,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:13,586 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:13,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:07:13,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:13,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1681378147, now seen corresponding path program 1 times [2022-11-03 04:07:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:13,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248573864] [2022-11-03 04:07:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:13,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 04:07:13,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:13,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248573864] [2022-11-03 04:07:13,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248573864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:13,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:13,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:07:13,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137597235] [2022-11-03 04:07:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:07:13,946 INFO L87 Difference]: Start difference. First operand 845 states and 1188 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 04:07:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:16,043 INFO L93 Difference]: Finished difference Result 1669 states and 2383 transitions. [2022-11-03 04:07:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:07:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 74 [2022-11-03 04:07:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:16,056 INFO L225 Difference]: With dead ends: 1669 [2022-11-03 04:07:16,056 INFO L226 Difference]: Without dead ends: 1664 [2022-11-03 04:07:16,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:16,059 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 601 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:16,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 1905 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 04:07:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-11-03 04:07:16,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1656. [2022-11-03 04:07:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1076 states have (on average 1.370817843866171) internal successors, (1475), 1116 states have internal predecessors, (1475), 427 states have call successors, (427), 153 states have call predecessors, (427), 152 states have return successors, (464), 418 states have call predecessors, (464), 426 states have call successors, (464) [2022-11-03 04:07:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2366 transitions. [2022-11-03 04:07:16,217 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2366 transitions. Word has length 74 [2022-11-03 04:07:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:16,220 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2366 transitions. [2022-11-03 04:07:16,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 04:07:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2366 transitions. [2022-11-03 04:07:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-03 04:07:16,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:16,234 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-11-03 04:07:16,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:07:16,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:16,235 INFO L85 PathProgramCache]: Analyzing trace with hash 462867534, now seen corresponding path program 1 times [2022-11-03 04:07:16,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:16,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697162247] [2022-11-03 04:07:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 04:07:16,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:16,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697162247] [2022-11-03 04:07:16,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697162247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:16,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:16,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:07:16,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537390445] [2022-11-03 04:07:16,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:16,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:16,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:16,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:16,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:16,375 INFO L87 Difference]: Start difference. First operand 1656 states and 2366 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, (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) [2022-11-03 04:07:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:17,337 INFO L93 Difference]: Finished difference Result 4216 states and 5967 transitions. [2022-11-03 04:07:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:17,338 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, (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 111 [2022-11-03 04:07:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:17,353 INFO L225 Difference]: With dead ends: 4216 [2022-11-03 04:07:17,353 INFO L226 Difference]: Without dead ends: 2581 [2022-11-03 04:07:17,359 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 [2022-11-03 04:07:17,360 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 348 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:17,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1061 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 04:07:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2022-11-03 04:07:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2574. [2022-11-03 04:07:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 1692 states have (on average 1.3599290780141844) internal successors, (2301), 1738 states have internal predecessors, (2301), 633 states have call successors, (633), 249 states have call predecessors, (633), 248 states have return successors, (688), 622 states have call predecessors, (688), 632 states have call successors, (688) [2022-11-03 04:07:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 3622 transitions. [2022-11-03 04:07:17,551 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 3622 transitions. Word has length 111 [2022-11-03 04:07:17,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:17,553 INFO L495 AbstractCegarLoop]: Abstraction has 2574 states and 3622 transitions. [2022-11-03 04:07:17,558 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, (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) [2022-11-03 04:07:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 3622 transitions. [2022-11-03 04:07:17,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 04:07:17,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:17,573 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:07:17,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -581744897, now seen corresponding path program 1 times [2022-11-03 04:07:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:17,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928161958] [2022-11-03 04:07:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-03 04:07:17,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:17,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928161958] [2022-11-03 04:07:17,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928161958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:17,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:17,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:07:17,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457088975] [2022-11-03 04:07:17,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:17,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:17,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:17,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:17,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:17,778 INFO L87 Difference]: Start difference. First operand 2574 states and 3622 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 04:07:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:19,198 INFO L93 Difference]: Finished difference Result 6264 states and 8775 transitions. [2022-11-03 04:07:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:19,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 128 [2022-11-03 04:07:19,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:19,218 INFO L225 Difference]: With dead ends: 6264 [2022-11-03 04:07:19,219 INFO L226 Difference]: Without dead ends: 3711 [2022-11-03 04:07:19,227 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 [2022-11-03 04:07:19,233 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 391 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:19,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1269 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 04:07:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2022-11-03 04:07:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 3706. [2022-11-03 04:07:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2449 states have (on average 1.3658636178031849) internal successors, (3345), 2531 states have internal predecessors, (3345), 874 states have call successors, (874), 383 states have call predecessors, (874), 382 states have return successors, (953), 855 states have call predecessors, (953), 873 states have call successors, (953) [2022-11-03 04:07:19,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5172 transitions. [2022-11-03 04:07:19,437 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5172 transitions. Word has length 128 [2022-11-03 04:07:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:19,438 INFO L495 AbstractCegarLoop]: Abstraction has 3706 states and 5172 transitions. [2022-11-03 04:07:19,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 04:07:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5172 transitions. [2022-11-03 04:07:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 04:07:19,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:19,446 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:19,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:07:19,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash 321831774, now seen corresponding path program 1 times [2022-11-03 04:07:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:19,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016815206] [2022-11-03 04:07:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:19,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-03 04:07:19,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:19,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016815206] [2022-11-03 04:07:19,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016815206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:19,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:19,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:07:19,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260424045] [2022-11-03 04:07:19,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:19,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:19,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:19,668 INFO L87 Difference]: Start difference. First operand 3706 states and 5172 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 04:07:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:20,680 INFO L93 Difference]: Finished difference Result 9110 states and 12673 transitions. [2022-11-03 04:07:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:20,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 129 [2022-11-03 04:07:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:20,721 INFO L225 Difference]: With dead ends: 9110 [2022-11-03 04:07:20,721 INFO L226 Difference]: Without dead ends: 5433 [2022-11-03 04:07:20,736 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 [2022-11-03 04:07:20,737 INFO L413 NwaCegarLoop]: 627 mSDtfsCounter, 448 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:20,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1095 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 04:07:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2022-11-03 04:07:21,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 5426. [2022-11-03 04:07:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5426 states, 3639 states have (on average 1.3561417971970322) internal successors, (4935), 3743 states have internal predecessors, (4935), 1200 states have call successors, (1200), 587 states have call predecessors, (1200), 586 states have return successors, (1311), 1179 states have call predecessors, (1311), 1199 states have call successors, (1311) [2022-11-03 04:07:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5426 states to 5426 states and 7446 transitions. [2022-11-03 04:07:21,078 INFO L78 Accepts]: Start accepts. Automaton has 5426 states and 7446 transitions. Word has length 129 [2022-11-03 04:07:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:21,079 INFO L495 AbstractCegarLoop]: Abstraction has 5426 states and 7446 transitions. [2022-11-03 04:07:21,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-03 04:07:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5426 states and 7446 transitions. [2022-11-03 04:07:21,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 04:07:21,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:21,088 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:21,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:07:21,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:21,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash 402002428, now seen corresponding path program 1 times [2022-11-03 04:07:21,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:21,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353450180] [2022-11-03 04:07:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-03 04:07:21,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:21,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353450180] [2022-11-03 04:07:21,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353450180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:21,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:21,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:07:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422475765] [2022-11-03 04:07:21,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:21,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:07:21,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:07:21,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:07:21,209 INFO L87 Difference]: Start difference. First operand 5426 states and 7446 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 04:07:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:22,243 INFO L93 Difference]: Finished difference Result 8186 states and 11366 transitions. [2022-11-03 04:07:22,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:07:22,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 133 [2022-11-03 04:07:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:22,280 INFO L225 Difference]: With dead ends: 8186 [2022-11-03 04:07:22,280 INFO L226 Difference]: Without dead ends: 5466 [2022-11-03 04:07:22,291 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 [2022-11-03 04:07:22,292 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 4 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:22,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1060 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 04:07:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2022-11-03 04:07:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 5466. [2022-11-03 04:07:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 3669 states have (on average 1.3532297628781684) internal successors, (4965), 3783 states have internal predecessors, (4965), 1200 states have call successors, (1200), 587 states have call predecessors, (1200), 596 states have return successors, (1321), 1179 states have call predecessors, (1321), 1199 states have call successors, (1321) [2022-11-03 04:07:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 7486 transitions. [2022-11-03 04:07:22,637 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 7486 transitions. Word has length 133 [2022-11-03 04:07:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:22,638 INFO L495 AbstractCegarLoop]: Abstraction has 5466 states and 7486 transitions. [2022-11-03 04:07:22,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 04:07:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 7486 transitions. [2022-11-03 04:07:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-03 04:07:22,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:22,648 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:22,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:07:22,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash -851000526, now seen corresponding path program 1 times [2022-11-03 04:07:22,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:22,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899087704] [2022-11-03 04:07:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-03 04:07:23,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:23,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899087704] [2022-11-03 04:07:23,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899087704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:23,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:23,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 04:07:23,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412927905] [2022-11-03 04:07:23,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:23,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 04:07:23,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:23,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 04:07:23,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:23,214 INFO L87 Difference]: Start difference. First operand 5466 states and 7486 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 04:07:28,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:28,481 INFO L93 Difference]: Finished difference Result 11807 states and 16265 transitions. [2022-11-03 04:07:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:07:28,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 134 [2022-11-03 04:07:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:28,521 INFO L225 Difference]: With dead ends: 11807 [2022-11-03 04:07:28,521 INFO L226 Difference]: Without dead ends: 6370 [2022-11-03 04:07:28,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 04:07:28,539 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 1090 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:28,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 1906 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 04:07:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6370 states. [2022-11-03 04:07:28,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6370 to 6058. [2022-11-03 04:07:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6058 states, 4011 states have (on average 1.3380703066566941) internal successors, (5367), 4153 states have internal predecessors, (5367), 1346 states have call successors, (1346), 665 states have call predecessors, (1346), 700 states have return successors, (1519), 1331 states have call predecessors, (1519), 1345 states have call successors, (1519) [2022-11-03 04:07:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6058 states to 6058 states and 8232 transitions. [2022-11-03 04:07:28,989 INFO L78 Accepts]: Start accepts. Automaton has 6058 states and 8232 transitions. Word has length 134 [2022-11-03 04:07:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:28,990 INFO L495 AbstractCegarLoop]: Abstraction has 6058 states and 8232 transitions. [2022-11-03 04:07:28,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 5 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-03 04:07:28,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6058 states and 8232 transitions. [2022-11-03 04:07:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-03 04:07:29,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:29,004 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:29,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:07:29,005 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 992567424, now seen corresponding path program 1 times [2022-11-03 04:07:29,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:29,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183661213] [2022-11-03 04:07:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:29,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:29,485 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-11-03 04:07:29,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:29,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183661213] [2022-11-03 04:07:29,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183661213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:29,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:07:29,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 04:07:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877435970] [2022-11-03 04:07:29,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:29,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:07:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:29,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:07:29,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:29,488 INFO L87 Difference]: Start difference. First operand 6058 states and 8232 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 04:07:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:31,368 INFO L93 Difference]: Finished difference Result 12185 states and 16644 transitions. [2022-11-03 04:07:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:07:31,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 164 [2022-11-03 04:07:31,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:31,408 INFO L225 Difference]: With dead ends: 12185 [2022-11-03 04:07:31,412 INFO L226 Difference]: Without dead ends: 6156 [2022-11-03 04:07:31,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:07:31,429 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 2 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:31,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2110 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:07:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6156 states. [2022-11-03 04:07:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6156 to 6122. [2022-11-03 04:07:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 4059 states have (on average 1.3340724316334072) internal successors, (5415), 4201 states have internal predecessors, (5415), 1346 states have call successors, (1346), 665 states have call predecessors, (1346), 716 states have return successors, (1543), 1347 states have call predecessors, (1543), 1345 states have call successors, (1543) [2022-11-03 04:07:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 8304 transitions. [2022-11-03 04:07:31,802 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 8304 transitions. Word has length 164 [2022-11-03 04:07:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:31,802 INFO L495 AbstractCegarLoop]: Abstraction has 6122 states and 8304 transitions. [2022-11-03 04:07:31,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 04:07:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 8304 transitions. [2022-11-03 04:07:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 04:07:31,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:31,819 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:31,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:07:31,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:31,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:31,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1336445128, now seen corresponding path program 1 times [2022-11-03 04:07:31,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:31,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014643136] [2022-11-03 04:07:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:31,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2022-11-03 04:07:32,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:32,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014643136] [2022-11-03 04:07:32,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014643136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:32,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977941344] [2022-11-03 04:07:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:32,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:32,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:32,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:32,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:07:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 04:07:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-11-03 04:07:33,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:07:33,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977941344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:07:33,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:07:33,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 04:07:33,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442141904] [2022-11-03 04:07:33,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:07:33,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:07:33,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:07:33,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:07:33,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:33,119 INFO L87 Difference]: Start difference. First operand 6122 states and 8304 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 04:07:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:07:35,098 INFO L93 Difference]: Finished difference Result 14275 states and 19605 transitions. [2022-11-03 04:07:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:07:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 182 [2022-11-03 04:07:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:07:35,136 INFO L225 Difference]: With dead ends: 14275 [2022-11-03 04:07:35,136 INFO L226 Difference]: Without dead ends: 8182 [2022-11-03 04:07:35,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 04:07:35,154 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 592 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 04:07:35,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1703 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 04:07:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2022-11-03 04:07:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7382. [2022-11-03 04:07:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7382 states, 4957 states have (on average 1.3401250756505951) internal successors, (6643), 5113 states have internal predecessors, (6643), 1586 states have call successors, (1586), 775 states have call predecessors, (1586), 838 states have return successors, (1831), 1589 states have call predecessors, (1831), 1585 states have call successors, (1831) [2022-11-03 04:07:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 10060 transitions. [2022-11-03 04:07:35,626 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 10060 transitions. Word has length 182 [2022-11-03 04:07:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:07:35,627 INFO L495 AbstractCegarLoop]: Abstraction has 7382 states and 10060 transitions. [2022-11-03 04:07:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 04:07:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 10060 transitions. [2022-11-03 04:07:35,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 04:07:35,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:07:35,645 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:07:35,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 04:07:35,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 04:07:35,866 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:07:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:07:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1505802165, now seen corresponding path program 1 times [2022-11-03 04:07:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:07:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245370513] [2022-11-03 04:07:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:35,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:07:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-03 04:07:36,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:07:36,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245370513] [2022-11-03 04:07:36,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245370513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:07:36,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514545026] [2022-11-03 04:07:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:07:36,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:07:36,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:07:36,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:07:36,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:07:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:07:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1375 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:07:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:07:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 96 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-11-03 04:07:37,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:07:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-03 04:07:38,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514545026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:07:38,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371567296] [2022-11-03 04:07:38,707 INFO L159 IcfgInterpreter]: Started Sifa with 105 locations of interest [2022-11-03 04:07:38,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:07:38,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:07:38,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:07:38,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:07:39,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2022-11-03 04:07:39,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 197 [2022-11-03 04:07:39,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:07:39,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 04:07:39,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:07:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-11-03 04:07:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:07:40,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-11-03 04:07:42,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:42,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:07:42,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:43,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:07:43,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:43,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:45,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:07:45,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:45,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:46,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:46,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:07:46,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:51,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:07:51,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:51,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:52,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:52,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:07:52,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:07:55,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:07:55,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:07:55,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:07:55,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:07:59,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:07:59,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:07:59,857 INFO L356 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2022-11-03 04:07:59,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 87 [2022-11-03 04:07:59,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:07:59,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2022-11-03 04:08:00,412 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:08:00,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 04:08:00,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 04:08:01,853 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:08:01,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 04:08:01,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 04:08:03,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:08:03,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:08:03,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:08:03,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:08:03,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:08:03,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:08:04,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:08:04,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:08:04,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:08:04,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:08:07,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 04:08:07,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 04:08:12,611 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_free with input of size 89 for LOIs [2022-11-03 04:08:12,723 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_sync_push with input of size 78 for LOIs [2022-11-03 04:08:12,807 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_dev_alloc_skb_15 with input of size 105 for LOIs [2022-11-03 04:08:13,051 INFO L197 IcfgInterpreter]: Interpreting procedure test_and_set_bit with input of size 58 for LOIs [2022-11-03 04:08:13,057 INFO L197 IcfgInterpreter]: Interpreting procedure spin_trylock_bh with input of size 71 for LOIs [2022-11-03 04:08:13,065 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_alloc with input of size 91 for LOIs [2022-11-03 04:08:13,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-03 04:08:13,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:08:13,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:08:13,419 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 99 for LOIs [2022-11-03 04:08:13,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:08:13,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 04:08:13,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:08:13,867 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 122 for LOIs [2022-11-03 04:08:13,928 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_remove with input of size 93 for LOIs [2022-11-03 04:08:13,993 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:09:48,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [371567296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:48,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:09:48,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [9, 9, 10] total 110 [2022-11-03 04:09:48,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354517749] [2022-11-03 04:09:48,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-03 04:09:48,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-03 04:09:48,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=11251, Unknown=0, NotChecked=0, Total=11990 [2022-11-03 04:09:48,751 INFO L87 Difference]: Start difference. First operand 7382 states and 10060 transitions. Second operand has 90 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 61 states have internal predecessors, (75), 22 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-03 04:13:15,695 WARN L234 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 241 DAG size of output: 239 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:13:26,394 WARN L234 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 248 DAG size of output: 244 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 04:14:44,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:15:18,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:15:39,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:15:42,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:15:53,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 04:16:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:18,619 INFO L93 Difference]: Finished difference Result 16430 states and 22563 transitions. [2022-11-03 04:16:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-11-03 04:16:18,620 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 61 states have internal predecessors, (75), 22 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 168 [2022-11-03 04:16:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:18,660 INFO L225 Difference]: With dead ends: 16430 [2022-11-03 04:16:18,660 INFO L226 Difference]: Without dead ends: 9059 [2022-11-03 04:16:18,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 404 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17982 ImplicationChecksByTransitivity, 244.6s TimeCoverageRelationStatistics Valid=2565, Invalid=46941, Unknown=0, NotChecked=0, Total=49506 [2022-11-03 04:16:18,693 INFO L413 NwaCegarLoop]: 903 mSDtfsCounter, 2140 mSDsluCounter, 34432 mSDsCounter, 0 mSdLazyCounter, 51164 mSolverCounterSat, 1220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 224.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 31852 SdHoareTripleChecker+Invalid, 53705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.0s SdHoareTripleChecker+Time, 1220 IncrementalHoareTripleChecker+Valid, 51164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1321 IncrementalHoareTripleChecker+Unchecked, 237.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:18,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 31852 Invalid, 53705 Unknown, 0 Unchecked, 1.0s Time], IncrementalHoareTripleChecker [1220 Valid, 51164 Invalid, 0 Unknown, 1321 Unchecked, 237.1s Time] [2022-11-03 04:16:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9059 states. [2022-11-03 04:16:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9059 to 8283. [2022-11-03 04:16:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8283 states, 5590 states have (on average 1.3411449016100179) internal successors, (7497), 5776 states have internal predecessors, (7497), 1768 states have call successors, (1768), 847 states have call predecessors, (1768), 924 states have return successors, (2083), 1756 states have call predecessors, (2083), 1767 states have call successors, (2083) [2022-11-03 04:16:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8283 states to 8283 states and 11348 transitions. [2022-11-03 04:16:19,759 INFO L78 Accepts]: Start accepts. Automaton has 8283 states and 11348 transitions. Word has length 168 [2022-11-03 04:16:19,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:19,761 INFO L495 AbstractCegarLoop]: Abstraction has 8283 states and 11348 transitions. [2022-11-03 04:16:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 61 states have internal predecessors, (75), 22 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-03 04:16:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 8283 states and 11348 transitions. [2022-11-03 04:16:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-11-03 04:16:19,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:19,785 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:19,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:16:19,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:16:19,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1990570803, now seen corresponding path program 1 times [2022-11-03 04:16:20,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:16:20,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021637017] [2022-11-03 04:16:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:20,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:16:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-03 04:16:20,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:16:20,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021637017] [2022-11-03 04:16:20,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021637017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:16:20,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:16:20,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:16:20,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443958475] [2022-11-03 04:16:20,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:16:20,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:16:20,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:16:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:16:20,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:16:20,320 INFO L87 Difference]: Start difference. First operand 8283 states and 11348 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 04:16:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:16:22,780 INFO L93 Difference]: Finished difference Result 12560 states and 17377 transitions. [2022-11-03 04:16:22,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:16:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 169 [2022-11-03 04:16:22,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:16:22,820 INFO L225 Difference]: With dead ends: 12560 [2022-11-03 04:16:22,820 INFO L226 Difference]: Without dead ends: 8423 [2022-11-03 04:16:22,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:16:22,839 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 9 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 04:16:22,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1591 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 04:16:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8423 states. [2022-11-03 04:16:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8423 to 8351. [2022-11-03 04:16:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8351 states, 5650 states have (on average 1.3417699115044248) internal successors, (7581), 5844 states have internal predecessors, (7581), 1768 states have call successors, (1768), 847 states have call predecessors, (1768), 932 states have return successors, (2091), 1756 states have call predecessors, (2091), 1767 states have call successors, (2091) [2022-11-03 04:16:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8351 states to 8351 states and 11440 transitions. [2022-11-03 04:16:24,193 INFO L78 Accepts]: Start accepts. Automaton has 8351 states and 11440 transitions. Word has length 169 [2022-11-03 04:16:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:16:24,194 INFO L495 AbstractCegarLoop]: Abstraction has 8351 states and 11440 transitions. [2022-11-03 04:16:24,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 04:16:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8351 states and 11440 transitions. [2022-11-03 04:16:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 04:16:24,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:16:24,219 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:16:24,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:16:24,220 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:16:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:16:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash -228372829, now seen corresponding path program 1 times [2022-11-03 04:16:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:16:24,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796613256] [2022-11-03 04:16:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:16:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-03 04:16:25,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:16:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796613256] [2022-11-03 04:16:25,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796613256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:16:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524434435] [2022-11-03 04:16:25,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:16:25,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:16:25,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:16:25,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:16:25,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:16:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:16:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 04:16:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:16:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 96 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-11-03 04:16:26,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:16:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-03 04:16:27,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524434435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:16:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923066448] [2022-11-03 04:16:27,132 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2022-11-03 04:16:27,133 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:16:27,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:16:27,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:16:27,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:16:27,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2022-11-03 04:16:27,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 197 [2022-11-03 04:16:28,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:16:28,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 04:16:28,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:16:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-11-03 04:16:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:16:28,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 37 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 49 [2022-11-03 04:16:29,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:29,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:29,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:30,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:30,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:30,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:32,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:32,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:32,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:32,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:33,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:33,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:36,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:36,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:36,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:37,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:37,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:37,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:41,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:16:41,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:16:41,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:16:41,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:16:45,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:16:45,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:16:45,833 INFO L356 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2022-11-03 04:16:45,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 87 [2022-11-03 04:16:45,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2022-11-03 04:16:45,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:16:46,275 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:16:46,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 04:16:46,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 04:16:47,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 04:16:47,888 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:16:47,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 04:16:53,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:53,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:53,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:54,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 04:16:54,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:54,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 04:16:56,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:16:56,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:16:56,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:16:56,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:17:05,755 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:17:05,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 04:17:05,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 04:17:08,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-03 04:17:09,738 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 04:17:09,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-11-03 04:17:15,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:17:15,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:17:16,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:17:16,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 04:17:20,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 04:17:20,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-03 04:17:23,478 INFO L197 IcfgInterpreter]: Interpreting procedure clear_bit with input of size 77 for LOIs [2022-11-03 04:17:23,485 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_free with input of size 89 for LOIs [2022-11-03 04:17:23,643 INFO L197 IcfgInterpreter]: Interpreting procedure ppp_sync_push with input of size 103 for LOIs [2022-11-03 04:17:24,381 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_dev_alloc_skb_15 with input of size 105 for LOIs [2022-11-03 04:17:24,618 INFO L197 IcfgInterpreter]: Interpreting procedure test_and_set_bit with input of size 74 for LOIs [2022-11-03 04:17:24,628 INFO L197 IcfgInterpreter]: Interpreting procedure spin_trylock_bh with input of size 91 for LOIs [2022-11-03 04:17:24,654 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_skb_alloc with input of size 91 for LOIs [2022-11-03 04:17:24,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-03 04:17:24,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:17:24,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 04:17:25,099 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 77 for LOIs [2022-11-03 04:17:25,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:17:25,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:17:25,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 04:17:25,537 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 98 for LOIs [2022-11-03 04:17:25,567 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_remove with input of size 93 for LOIs [2022-11-03 04:17:25,620 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 75 for LOIs [2022-11-03 04:17:25,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:19:14,899 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228827#(and (<= 0 |~#sync_ops~0.offset|) (<= 0 ~ldv_state_variable_2~0) (<= 0 |#NULL.base|) (<= ~LDV_IN_INTERRUPT~0 1) (<= 0 ~ldv_retval_0~0) (<= ~LDV_SKBS~0.base 0) (<= 0 ~LDV_SKBS~0.offset) (<= ~ldv_retval_0~0 0) (<= 0 ~ppp_sync_ldisc_group1~0.offset) (<= 21 |~#sync_ops~0.base|) (<= ~ppp_sync_ldisc_group1~0.offset 0) (<= 0 ~ldv_retval_1~0) (<= 1 ~LDV_IN_INTERRUPT~0) (<= ~LDV_SKBS~0.offset 0) (<= ~ldv_state_variable_1~0 1) (<= ~sync_ops_group0~0.offset 0) (<= |~#set_impl~0.offset| 0) (<= |#NULL.offset| 0) (<= 0 |~#ppp_sync_ldisc~0.offset|) (<= 0 ~ldv_state_variable_1~0) (<= ~ldv_retval_1~0 0) (<= |~#disc_data_lock~0.offset| 0) (<= 0 ~LDV_SKBS~0.base) (<= |~#disc_data_lock~0.base| 22) (= ~ldv_state_variable_0~0 2) (<= |~#ppp_sync_ldisc~0.base| 23) (= ~ref_cnt~0 0) (<= |#NULL.base| 0) (<= |~#sync_ops~0.base| 21) (<= 0 |~#disc_data_lock~0.offset|) (<= 24 |~#set_impl~0.base|) (<= |~#ppp_sync_ldisc~0.offset| 0) (<= |~#sync_ops~0.offset| 0) (<= 22 |~#disc_data_lock~0.base|) (<= 0 |#NULL.offset|) (<= ~ldv_state_variable_2~0 1) (<= |~#set_impl~0.base| 24) (<= 0 ~sync_ops_group0~0.offset) (<= 0 |#StackHeapBarrier|) (<= 0 |~#set_impl~0.offset|) (<= 23 |~#ppp_sync_ldisc~0.base|) (= (ite (= ~last_index~0 0) 1 0) 0))' at error location [2022-11-03 04:19:14,899 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:19:14,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:19:14,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-03 04:19:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519121152] [2022-11-03 04:19:14,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:19:14,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 04:19:14,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:19:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 04:19:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=12701, Unknown=0, NotChecked=0, Total=13340 [2022-11-03 04:19:14,904 INFO L87 Difference]: Start difference. First operand 8351 states and 11440 transitions. Second operand has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 11 states have call successors, (48), 8 states have call predecessors, (48), 12 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2022-11-03 04:19:33,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:19:33,983 INFO L93 Difference]: Finished difference Result 24217 states and 34218 transitions. [2022-11-03 04:19:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 04:19:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 11 states have call successors, (48), 8 states have call predecessors, (48), 12 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) Word has length 171 [2022-11-03 04:19:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:19:34,081 INFO L225 Difference]: With dead ends: 24217 [2022-11-03 04:19:34,081 INFO L226 Difference]: Without dead ends: 19902 [2022-11-03 04:19:34,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 411 SyntacticMatches, 7 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7281 ImplicationChecksByTransitivity, 111.0s TimeCoverageRelationStatistics Valid=941, Invalid=17149, Unknown=0, NotChecked=0, Total=18090 [2022-11-03 04:19:34,111 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 5327 mSDsluCounter, 5068 mSDsCounter, 0 mSdLazyCounter, 8137 mSolverCounterSat, 3284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5592 SdHoareTripleChecker+Valid, 5151 SdHoareTripleChecker+Invalid, 11421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3284 IncrementalHoareTripleChecker+Valid, 8137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:19:34,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5592 Valid, 5151 Invalid, 11421 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3284 Valid, 8137 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2022-11-03 04:19:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19902 states. [2022-11-03 04:19:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19902 to 19451. [2022-11-03 04:19:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19451 states, 13151 states have (on average 1.3471979317162193) internal successors, (17717), 13610 states have internal predecessors, (17717), 4187 states have call successors, (4187), 1911 states have call predecessors, (4187), 2112 states have return successors, (5089), 4174 states have call predecessors, (5089), 4186 states have call successors, (5089) [2022-11-03 04:19:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19451 states to 19451 states and 26993 transitions. [2022-11-03 04:19:35,640 INFO L78 Accepts]: Start accepts. Automaton has 19451 states and 26993 transitions. Word has length 171 [2022-11-03 04:19:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:19:35,641 INFO L495 AbstractCegarLoop]: Abstraction has 19451 states and 26993 transitions. [2022-11-03 04:19:35,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 11 states have call successors, (48), 8 states have call predecessors, (48), 12 states have return successors, (47), 16 states have call predecessors, (47), 11 states have call successors, (47) [2022-11-03 04:19:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 19451 states and 26993 transitions. [2022-11-03 04:19:35,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 04:19:35,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:19:35,666 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:19:35,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:19:35,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:35,894 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:19:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:19:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1102481638, now seen corresponding path program 1 times [2022-11-03 04:19:35,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:19:35,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508614746] [2022-11-03 04:19:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:35,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:19:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-11-03 04:19:36,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:19:36,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508614746] [2022-11-03 04:19:36,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508614746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:19:36,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:19:36,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:19:36,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402566722] [2022-11-03 04:19:36,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:19:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 04:19:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:19:36,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 04:19:36,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 04:19:36,424 INFO L87 Difference]: Start difference. First operand 19451 states and 26993 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 04:19:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:19:40,613 INFO L93 Difference]: Finished difference Result 52074 states and 75753 transitions. [2022-11-03 04:19:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 04:19:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 171 [2022-11-03 04:19:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:19:40,808 INFO L225 Difference]: With dead ends: 52074 [2022-11-03 04:19:40,808 INFO L226 Difference]: Without dead ends: 33457 [2022-11-03 04:19:40,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:19:40,873 INFO L413 NwaCegarLoop]: 919 mSDtfsCounter, 607 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 2355 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:19:40,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 2355 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 04:19:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33457 states. [2022-11-03 04:19:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33457 to 19531. [2022-11-03 04:19:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19531 states, 13231 states have (on average 1.3450986320006046) internal successors, (17797), 13690 states have internal predecessors, (17797), 4187 states have call successors, (4187), 1911 states have call predecessors, (4187), 2112 states have return successors, (5089), 4174 states have call predecessors, (5089), 4186 states have call successors, (5089) [2022-11-03 04:19:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19531 states to 19531 states and 27073 transitions. [2022-11-03 04:19:42,942 INFO L78 Accepts]: Start accepts. Automaton has 19531 states and 27073 transitions. Word has length 171 [2022-11-03 04:19:42,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:19:42,943 INFO L495 AbstractCegarLoop]: Abstraction has 19531 states and 27073 transitions. [2022-11-03 04:19:42,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 04:19:42,943 INFO L276 IsEmpty]: Start isEmpty. Operand 19531 states and 27073 transitions. [2022-11-03 04:19:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 04:19:42,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:19:42,966 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:19:42,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:19:42,966 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:19:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:19:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1393916888, now seen corresponding path program 1 times [2022-11-03 04:19:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:19:42,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730028131] [2022-11-03 04:19:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:19:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-11-03 04:19:48,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:19:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730028131] [2022-11-03 04:19:48,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730028131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:19:48,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003195035] [2022-11-03 04:19:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:19:48,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:19:48,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:19:48,497 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:19:48,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35b403e2-6d21-4609-b8a3-05286f02340b/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:19:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:19:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 04:19:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:19:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-11-03 04:19:49,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 04:19:49,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003195035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:19:49,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 04:19:49,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [27] total 37 [2022-11-03 04:19:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266702408] [2022-11-03 04:19:49,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:19:49,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 04:19:49,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:19:49,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 04:19:49,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 04:19:49,975 INFO L87 Difference]: Start difference. First operand 19531 states and 27073 transitions. Second operand has 13 states, 10 states have (on average 8.8) internal successors, (88), 9 states have internal predecessors, (88), 3 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (24), 6 states have call predecessors, (24), 3 states have call successors, (24)