./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.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_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/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_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/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_25926ab9-fad3-487d-b40a-3e49d6e2b377/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 267df3d840ee451a69f2c9c23fc4c286b307e31eb8c416518f7dce9b4c82858a --- 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 01:53:37,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:53:37,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:53:37,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:53:37,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:53:37,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:53:37,118 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:53:37,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:53:37,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:53:37,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:53:37,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:53:37,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:53:37,132 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:53:37,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:53:37,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:53:37,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:53:37,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:53:37,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:53:37,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:53:37,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:53:37,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:53:37,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:53:37,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:53:37,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:53:37,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:53:37,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:53:37,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:53:37,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:53:37,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:53:37,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:53:37,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:53:37,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:53:37,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:53:37,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:53:37,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:53:37,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:53:37,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:53:37,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:53:37,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:53:37,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:53:37,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:53:37,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 01:53:37,217 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:53:37,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:53:37,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:53:37,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:53:37,219 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:53:37,219 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:53:37,219 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:53:37,220 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:53:37,220 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:53:37,220 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:53:37,221 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:53:37,222 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:53:37,222 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:53:37,222 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:53:37,222 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:53:37,223 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:53:37,223 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:53:37,223 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:53:37,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:53:37,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:53:37,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:53:37,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:53:37,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:53:37,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:53:37,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:53:37,235 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:53:37,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:53:37,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:53:37,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:53:37,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:53:37,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:53:37,236 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:53:37,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:53:37,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:53:37,237 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:53:37,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:53:37,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:53:37,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:53:37,238 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_25926ab9-fad3-487d-b40a-3e49d6e2b377/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 267df3d840ee451a69f2c9c23fc4c286b307e31eb8c416518f7dce9b4c82858a [2022-11-03 01:53:37,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:53:37,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:53:37,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:53:37,641 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:53:37,642 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:53:37,643 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2022-11-03 01:53:37,715 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/data/2f6112d64/dc05de5382984e9583926ca87de5126f/FLAG7c5627887 [2022-11-03 01:53:38,669 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:53:38,670 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2022-11-03 01:53:38,736 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/data/2f6112d64/dc05de5382984e9583926ca87de5126f/FLAG7c5627887 [2022-11-03 01:53:39,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/data/2f6112d64/dc05de5382984e9583926ca87de5126f [2022-11-03 01:53:39,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:53:39,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:53:39,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:53:39,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:53:39,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:53:39,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:53:39" (1/1) ... [2022-11-03 01:53:39,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@347b72d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:39, skipping insertion in model container [2022-11-03 01:53:39,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:53:39" (1/1) ... [2022-11-03 01:53:39,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:53:39,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:53:41,745 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_25926ab9-fad3-487d-b40a-3e49d6e2b377/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[313744,313757] [2022-11-03 01:53:41,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:53:41,879 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:53:42,429 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_25926ab9-fad3-487d-b40a-3e49d6e2b377/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i[313744,313757] [2022-11-03 01:53:42,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:53:42,622 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:53:42,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42 WrapperNode [2022-11-03 01:53:42,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:53:42,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:53:42,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:53:42,625 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:53:42,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:42,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,067 INFO L138 Inliner]: procedures = 388, calls = 3920, calls flagged for inlining = 190, calls inlined = 187, statements flattened = 7932 [2022-11-03 01:53:43,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:53:43,069 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:53:43,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:53:43,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:53:43,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:53:43,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:53:43,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:53:43,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:53:43,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (1/1) ... [2022-11-03 01:53:43,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:53:43,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:53:43,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:53:43,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:53:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2022-11-03 01:53:43,658 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2022-11-03 01:53:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2022-11-03 01:53:43,658 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2022-11-03 01:53:43,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2022-11-03 01:53:43,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2022-11-03 01:53:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 01:53:43,659 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 01:53:43,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 01:53:43,659 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 01:53:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-03 01:53:43,660 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-03 01:53:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2022-11-03 01:53:43,660 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2022-11-03 01:53:43,660 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2022-11-03 01:53:43,661 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2022-11-03 01:53:43,661 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-03 01:53:43,661 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-03 01:53:43,661 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2022-11-03 01:53:43,661 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2022-11-03 01:53:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 01:53:43,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 01:53:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2022-11-03 01:53:43,662 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2022-11-03 01:53:43,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_driver_5 [2022-11-03 01:53:43,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_driver_5 [2022-11-03 01:53:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2022-11-03 01:53:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2022-11-03 01:53:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2022-11-03 01:53:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2022-11-03 01:53:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-03 01:53:43,664 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-03 01:53:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2022-11-03 01:53:43,664 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2022-11-03 01:53:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister_drivers [2022-11-03 01:53:43,665 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister_drivers [2022-11-03 01:53:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2022-11-03 01:53:43,666 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2022-11-03 01:53:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2022-11-03 01:53:43,666 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2022-11-03 01:53:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_work [2022-11-03 01:53:43,666 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_work [2022-11-03 01:53:43,667 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 01:53:43,667 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 01:53:43,667 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2022-11-03 01:53:43,667 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2022-11-03 01:53:43,668 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2022-11-03 01:53:43,668 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2022-11-03 01:53:43,669 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2022-11-03 01:53:43,670 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2022-11-03 01:53:43,670 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2022-11-03 01:53:43,670 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2022-11-03 01:53:43,670 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2022-11-03 01:53:43,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2022-11-03 01:53:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 01:53:43,671 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 01:53:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2022-11-03 01:53:43,671 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2022-11-03 01:53:43,671 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2022-11-03 01:53:43,672 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2022-11-03 01:53:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-03 01:53:43,672 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2022-11-03 01:53:43,673 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2022-11-03 01:53:43,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 01:53:43,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 01:53:43,673 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 01:53:43,673 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 01:53:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2022-11-03 01:53:43,674 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2022-11-03 01:53:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:53:43,674 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-03 01:53:43,675 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-03 01:53:43,675 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2022-11-03 01:53:43,675 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2022-11-03 01:53:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2022-11-03 01:53:43,676 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2022-11-03 01:53:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 01:53:43,676 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 01:53:43,676 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2022-11-03 01:53:43,677 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2022-11-03 01:53:43,677 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2022-11-03 01:53:43,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2022-11-03 01:53:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 01:53:43,678 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 01:53:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 01:53:43,678 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2022-11-03 01:53:43,679 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2022-11-03 01:53:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-03 01:53:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-03 01:53:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 01:53:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2022-11-03 01:53:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2022-11-03 01:53:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2022-11-03 01:53:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2022-11-03 01:53:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2022-11-03 01:53:43,682 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2022-11-03 01:53:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:53:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 01:53:43,683 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 01:53:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2022-11-03 01:53:43,683 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2022-11-03 01:53:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2022-11-03 01:53:43,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2022-11-03 01:53:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-03 01:53:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-03 01:53:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-03 01:53:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-03 01:53:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 01:53:43,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 01:53:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:53:43,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:53:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:53:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 01:53:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 01:53:43,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 01:53:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-03 01:53:43,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-03 01:53:43,692 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2022-11-03 01:53:43,693 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2022-11-03 01:53:43,693 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 01:53:43,699 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 01:53:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2022-11-03 01:53:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2022-11-03 01:53:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 01:53:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 01:53:43,700 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2022-11-03 01:53:43,700 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2022-11-03 01:53:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-03 01:53:43,701 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-03 01:53:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:53:43,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:53:43,701 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2022-11-03 01:53:43,701 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2022-11-03 01:53:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 01:53:43,702 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 01:53:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2022-11-03 01:53:43,702 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2022-11-03 01:53:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2022-11-03 01:53:43,702 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2022-11-03 01:53:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-03 01:53:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-03 01:53:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-03 01:53:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-03 01:53:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2022-11-03 01:53:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2022-11-03 01:53:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2022-11-03 01:53:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2022-11-03 01:53:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 01:53:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 01:53:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 01:53:43,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 01:53:43,704 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_show [2022-11-03 01:53:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_show [2022-11-03 01:53:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2022-11-03 01:53:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2022-11-03 01:53:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-03 01:53:43,705 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-03 01:53:43,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2022-11-03 01:53:43,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2022-11-03 01:53:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 01:53:43,706 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 01:53:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-03 01:53:43,706 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-03 01:53:43,706 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 01:53:43,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 01:53:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_4 [2022-11-03 01:53:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_4 [2022-11-03 01:53:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2022-11-03 01:53:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2022-11-03 01:53:43,707 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_msr_changed [2022-11-03 01:53:43,707 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_msr_changed [2022-11-03 01:53:43,708 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2022-11-03 01:53:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2022-11-03 01:53:43,708 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 01:53:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 01:53:43,708 INFO L130 BoogieDeclarations]: Found specification of procedure new_id_store [2022-11-03 01:53:43,708 INFO L138 BoogieDeclarations]: Found implementation of procedure new_id_store [2022-11-03 01:53:43,709 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2022-11-03 01:53:43,709 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2022-11-03 01:53:43,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:53:43,709 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 01:53:43,709 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 01:53:43,709 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2022-11-03 01:53:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2022-11-03 01:53:43,710 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2022-11-03 01:53:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2022-11-03 01:53:43,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:53:43,710 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 01:53:43,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 01:53:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2022-11-03 01:53:43,711 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2022-11-03 01:53:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:53:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 01:53:43,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-03 01:53:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2022-11-03 01:53:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2022-11-03 01:53:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 01:53:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 01:53:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2022-11-03 01:53:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2022-11-03 01:53:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-03 01:53:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-03 01:53:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-03 01:53:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-03 01:53:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-03 01:53:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-03 01:53:43,713 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_softint [2022-11-03 01:53:43,713 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_softint [2022-11-03 01:53:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2022-11-03 01:53:43,714 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2022-11-03 01:53:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 01:53:43,714 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 01:53:43,714 INFO L130 BoogieDeclarations]: Found specification of procedure jiffies_to_msecs [2022-11-03 01:53:43,714 INFO L138 BoogieDeclarations]: Found implementation of procedure jiffies_to_msecs [2022-11-03 01:53:43,715 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2022-11-03 01:53:43,715 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2022-11-03 01:53:43,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2022-11-03 01:53:43,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2022-11-03 01:53:43,715 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2022-11-03 01:53:43,715 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2022-11-03 01:53:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-03 01:53:43,716 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-03 01:53:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure serial_wait_until_sent [2022-11-03 01:53:43,716 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_wait_until_sent [2022-11-03 01:53:43,716 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 01:53:43,716 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 01:53:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2022-11-03 01:53:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2022-11-03 01:53:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2022-11-03 01:53:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2022-11-03 01:53:43,717 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 01:53:43,717 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 01:53:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-03 01:53:43,718 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-03 01:53:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 01:53:43,718 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 01:53:43,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:53:43,719 INFO L130 BoogieDeclarations]: Found specification of procedure serial_set_termios [2022-11-03 01:53:43,723 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_set_termios [2022-11-03 01:53:43,723 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2022-11-03 01:53:43,724 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2022-11-03 01:53:43,724 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-03 01:53:43,724 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-03 01:53:43,724 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 01:53:43,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 01:53:43,724 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2022-11-03 01:53:43,725 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2022-11-03 01:53:43,725 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2022-11-03 01:53:43,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2022-11-03 01:53:43,727 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_get_by_minor [2022-11-03 01:53:43,727 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_get_by_minor [2022-11-03 01:53:43,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 01:53:43,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 01:53:43,728 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2022-11-03 01:53:43,728 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2022-11-03 01:53:43,728 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_handle_sysrq_char [2022-11-03 01:53:43,728 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_handle_sysrq_char [2022-11-03 01:53:43,728 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2022-11-03 01:53:43,729 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2022-11-03 01:53:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-03 01:53:43,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-03 01:53:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2022-11-03 01:53:43,729 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2022-11-03 01:53:43,729 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2022-11-03 01:53:43,729 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2022-11-03 01:53:43,730 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2022-11-03 01:53:43,730 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2022-11-03 01:53:43,730 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 01:53:43,730 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 01:53:43,730 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 01:53:43,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 01:53:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2022-11-03 01:53:43,731 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2022-11-03 01:53:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:53:43,731 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2022-11-03 01:53:43,731 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2022-11-03 01:53:44,879 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:53:44,883 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:53:45,423 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 01:53:58,103 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:54:00,218 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:54:00,218 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 01:54:00,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:54:00 BoogieIcfgContainer [2022-11-03 01:54:00,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:54:00,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:54:00,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:54:00,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:54:00,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:53:39" (1/3) ... [2022-11-03 01:54:00,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bceeeac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:54:00, skipping insertion in model container [2022-11-03 01:54:00,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:53:42" (2/3) ... [2022-11-03 01:54:00,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bceeeac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:54:00, skipping insertion in model container [2022-11-03 01:54:00,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:54:00" (3/3) ... [2022-11-03 01:54:00,234 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--usb--serial--usbserial.ko-entry_point.cil.out.i [2022-11-03 01:54:00,254 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:54:00,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:54:00,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:54:00,376 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;@3c5b1231, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:54:00,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:54:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 1801 states, 1151 states have (on average 1.3588184187662902) internal successors, (1564), 1187 states have internal predecessors, (1564), 520 states have call successors, (520), 129 states have call predecessors, (520), 128 states have return successors, (509), 496 states have call predecessors, (509), 509 states have call successors, (509) [2022-11-03 01:54:00,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-03 01:54:00,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:00,447 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:00,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:00,456 INFO L85 PathProgramCache]: Analyzing trace with hash -779559723, now seen corresponding path program 1 times [2022-11-03 01:54:00,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:00,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916393651] [2022-11-03 01:54:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:00,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-11-03 01:54:02,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:02,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916393651] [2022-11-03 01:54:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916393651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:02,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:02,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:54:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278445878] [2022-11-03 01:54:02,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:02,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:54:02,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:54:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:54:02,229 INFO L87 Difference]: Start difference. First operand has 1801 states, 1151 states have (on average 1.3588184187662902) internal successors, (1564), 1187 states have internal predecessors, (1564), 520 states have call successors, (520), 129 states have call predecessors, (520), 128 states have return successors, (509), 496 states have call predecessors, (509), 509 states have call successors, (509) Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 01:54:04,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:06,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:09,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:13,839 INFO L93 Difference]: Finished difference Result 4939 states and 7205 transitions. [2022-11-03 01:54:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:54:13,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 228 [2022-11-03 01:54:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:13,883 INFO L225 Difference]: With dead ends: 4939 [2022-11-03 01:54:13,883 INFO L226 Difference]: Without dead ends: 3144 [2022-11-03 01:54:13,898 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 01:54:13,901 INFO L413 NwaCegarLoop]: 2679 mSDtfsCounter, 1975 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1975 SdHoareTripleChecker+Valid, 4899 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:13,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1975 Valid, 4899 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 626 Invalid, 3 Unknown, 0 Unchecked, 11.2s Time] [2022-11-03 01:54:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-11-03 01:54:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 3138. [2022-11-03 01:54:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 2024 states have (on average 1.3537549407114624) internal successors, (2740), 2067 states have internal predecessors, (2740), 877 states have call successors, (877), 237 states have call predecessors, (877), 236 states have return successors, (887), 849 states have call predecessors, (887), 875 states have call successors, (887) [2022-11-03 01:54:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 4504 transitions. [2022-11-03 01:54:14,184 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 4504 transitions. Word has length 228 [2022-11-03 01:54:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:14,186 INFO L495 AbstractCegarLoop]: Abstraction has 3138 states and 4504 transitions. [2022-11-03 01:54:14,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-03 01:54:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 4504 transitions. [2022-11-03 01:54:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-03 01:54:14,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:14,214 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:14,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:54:14,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:14,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:14,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1202057471, now seen corresponding path program 1 times [2022-11-03 01:54:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438090052] [2022-11-03 01:54:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-11-03 01:54:15,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:15,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438090052] [2022-11-03 01:54:15,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438090052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:15,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:15,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:54:15,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56831509] [2022-11-03 01:54:15,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:15,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:54:15,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:15,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:54:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:54:15,323 INFO L87 Difference]: Start difference. First operand 3138 states and 4504 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 01:54:17,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:19,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:25,564 INFO L93 Difference]: Finished difference Result 6359 states and 9161 transitions. [2022-11-03 01:54:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:54:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 238 [2022-11-03 01:54:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:25,599 INFO L225 Difference]: With dead ends: 6359 [2022-11-03 01:54:25,599 INFO L226 Difference]: Without dead ends: 4609 [2022-11-03 01:54:25,611 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 01:54:25,612 INFO L413 NwaCegarLoop]: 2725 mSDtfsCounter, 2104 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2104 SdHoareTripleChecker+Valid, 4922 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:25,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2104 Valid, 4922 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 632 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2022-11-03 01:54:25,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4609 states. [2022-11-03 01:54:25,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4609 to 4602. [2022-11-03 01:54:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4602 states, 2973 states have (on average 1.355196770938446) internal successors, (4029), 3038 states have internal predecessors, (4029), 1276 states have call successors, (1276), 353 states have call predecessors, (1276), 352 states have return successors, (1298), 1235 states have call predecessors, (1298), 1274 states have call successors, (1298) [2022-11-03 01:54:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4602 states to 4602 states and 6603 transitions. [2022-11-03 01:54:25,850 INFO L78 Accepts]: Start accepts. Automaton has 4602 states and 6603 transitions. Word has length 238 [2022-11-03 01:54:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:25,852 INFO L495 AbstractCegarLoop]: Abstraction has 4602 states and 6603 transitions. [2022-11-03 01:54:25,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 01:54:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4602 states and 6603 transitions. [2022-11-03 01:54:25,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-03 01:54:25,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:25,867 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:25,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:54:25,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash -165429054, now seen corresponding path program 1 times [2022-11-03 01:54:25,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:25,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960259528] [2022-11-03 01:54:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:25,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2022-11-03 01:54:26,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:26,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960259528] [2022-11-03 01:54:26,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960259528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:26,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:26,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:54:26,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206714888] [2022-11-03 01:54:26,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:26,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:54:26,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:26,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:54:26,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:54:26,749 INFO L87 Difference]: Start difference. First operand 4602 states and 6603 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 01:54:28,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:31,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:32,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:36,920 INFO L93 Difference]: Finished difference Result 12051 states and 17355 transitions. [2022-11-03 01:54:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:54:36,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 248 [2022-11-03 01:54:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:36,977 INFO L225 Difference]: With dead ends: 12051 [2022-11-03 01:54:36,977 INFO L226 Difference]: Without dead ends: 7496 [2022-11-03 01:54:37,010 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 01:54:37,012 INFO L413 NwaCegarLoop]: 2802 mSDtfsCounter, 2329 mSDsluCounter, 2522 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 5023 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:37,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 5023 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 653 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2022-11-03 01:54:37,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7496 states. [2022-11-03 01:54:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7496 to 7480. [2022-11-03 01:54:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 4821 states have (on average 1.354490769549886) internal successors, (6530), 4931 states have internal predecessors, (6530), 2074 states have call successors, (2074), 587 states have call predecessors, (2074), 584 states have return successors, (2200), 2002 states have call predecessors, (2200), 2072 states have call successors, (2200) [2022-11-03 01:54:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 10804 transitions. [2022-11-03 01:54:37,417 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 10804 transitions. Word has length 248 [2022-11-03 01:54:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:37,418 INFO L495 AbstractCegarLoop]: Abstraction has 7480 states and 10804 transitions. [2022-11-03 01:54:37,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 01:54:37,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 10804 transitions. [2022-11-03 01:54:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-03 01:54:37,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:37,432 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:37,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:54:37,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1250201056, now seen corresponding path program 1 times [2022-11-03 01:54:37,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:37,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499121354] [2022-11-03 01:54:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:37,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 754 trivial. 0 not checked. [2022-11-03 01:54:38,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:38,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499121354] [2022-11-03 01:54:38,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499121354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:38,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:38,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:54:38,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944474313] [2022-11-03 01:54:38,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:38,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:54:38,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:54:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:54:38,114 INFO L87 Difference]: Start difference. First operand 7480 states and 10804 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 01:54:40,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:42,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:45,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:54:48,259 INFO L93 Difference]: Finished difference Result 21097 states and 30336 transitions. [2022-11-03 01:54:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:54:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 252 [2022-11-03 01:54:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:54:48,401 INFO L225 Difference]: With dead ends: 21097 [2022-11-03 01:54:48,401 INFO L226 Difference]: Without dead ends: 13677 [2022-11-03 01:54:48,449 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 01:54:48,453 INFO L413 NwaCegarLoop]: 2767 mSDtfsCounter, 2032 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2032 SdHoareTripleChecker+Valid, 4928 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:54:48,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2032 Valid, 4928 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 738 Invalid, 2 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 01:54:48,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2022-11-03 01:54:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13661. [2022-11-03 01:54:49,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13661 states, 8764 states have (on average 1.3482428115015974) internal successors, (11816), 8980 states have internal predecessors, (11816), 3779 states have call successors, (3779), 1122 states have call predecessors, (3779), 1117 states have return successors, (3999), 3634 states have call predecessors, (3999), 3777 states have call successors, (3999) [2022-11-03 01:54:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13661 states to 13661 states and 19594 transitions. [2022-11-03 01:54:49,340 INFO L78 Accepts]: Start accepts. Automaton has 13661 states and 19594 transitions. Word has length 252 [2022-11-03 01:54:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:54:49,341 INFO L495 AbstractCegarLoop]: Abstraction has 13661 states and 19594 transitions. [2022-11-03 01:54:49,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 01:54:49,341 INFO L276 IsEmpty]: Start isEmpty. Operand 13661 states and 19594 transitions. [2022-11-03 01:54:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-03 01:54:49,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:54:49,352 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:54:49,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:54:49,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:54:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:54:49,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1068586725, now seen corresponding path program 1 times [2022-11-03 01:54:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:54:49,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809679934] [2022-11-03 01:54:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:54:49,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:54:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:54:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 750 trivial. 0 not checked. [2022-11-03 01:54:50,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:54:50,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809679934] [2022-11-03 01:54:50,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809679934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:54:50,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:54:50,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:54:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351505595] [2022-11-03 01:54:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:54:50,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:54:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:54:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:54:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:54:50,022 INFO L87 Difference]: Start difference. First operand 13661 states and 19594 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 01:54:52,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:54,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:00,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:02,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:02,340 INFO L93 Difference]: Finished difference Result 39172 states and 56707 transitions. [2022-11-03 01:55:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:55:02,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 255 [2022-11-03 01:55:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:02,517 INFO L225 Difference]: With dead ends: 39172 [2022-11-03 01:55:02,518 INFO L226 Difference]: Without dead ends: 25571 [2022-11-03 01:55:02,599 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 01:55:02,600 INFO L413 NwaCegarLoop]: 3598 mSDtfsCounter, 2322 mSDsluCounter, 2566 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2322 SdHoareTripleChecker+Valid, 5859 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:02,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2322 Valid, 5859 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 800 Invalid, 2 Unknown, 0 Unchecked, 11.5s Time] [2022-11-03 01:55:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25571 states. [2022-11-03 01:55:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25571 to 25510. [2022-11-03 01:55:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25510 states, 16359 states have (on average 1.346048046946635) internal successors, (22020), 16746 states have internal predecessors, (22020), 7020 states have call successors, (7020), 2134 states have call predecessors, (7020), 2130 states have return successors, (8085), 6760 states have call predecessors, (8085), 7018 states have call successors, (8085) [2022-11-03 01:55:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25510 states to 25510 states and 37125 transitions. [2022-11-03 01:55:04,167 INFO L78 Accepts]: Start accepts. Automaton has 25510 states and 37125 transitions. Word has length 255 [2022-11-03 01:55:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:04,168 INFO L495 AbstractCegarLoop]: Abstraction has 25510 states and 37125 transitions. [2022-11-03 01:55:04,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 01:55:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 25510 states and 37125 transitions. [2022-11-03 01:55:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-11-03 01:55:04,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:04,226 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:04,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:55:04,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:04,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash 559270087, now seen corresponding path program 1 times [2022-11-03 01:55:04,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:04,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625128729] [2022-11-03 01:55:04,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:04,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2022-11-03 01:55:04,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625128729] [2022-11-03 01:55:04,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625128729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:04,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:04,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:55:04,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103063813] [2022-11-03 01:55:04,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:04,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:55:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:55:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:55:04,959 INFO L87 Difference]: Start difference. First operand 25510 states and 37125 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-03 01:55:07,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:09,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:11,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:18,867 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 01:55:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:19,388 INFO L93 Difference]: Finished difference Result 55245 states and 80165 transitions. [2022-11-03 01:55:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:55:19,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 290 [2022-11-03 01:55:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:19,562 INFO L225 Difference]: With dead ends: 55245 [2022-11-03 01:55:19,562 INFO L226 Difference]: Without dead ends: 29795 [2022-11-03 01:55:19,661 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 01:55:19,662 INFO L413 NwaCegarLoop]: 3956 mSDtfsCounter, 2340 mSDsluCounter, 2173 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2340 SdHoareTripleChecker+Valid, 5849 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:19,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2340 Valid, 5849 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 844 Invalid, 2 Unknown, 0 Unchecked, 13.3s Time] [2022-11-03 01:55:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29795 states. [2022-11-03 01:55:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29795 to 29710. [2022-11-03 01:55:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29710 states, 19019 states have (on average 1.3426047636573952) internal successors, (25535), 19465 states have internal predecessors, (25535), 8152 states have call successors, (8152), 2538 states have call predecessors, (8152), 2538 states have return successors, (9321), 7854 states have call predecessors, (9321), 8150 states have call successors, (9321) [2022-11-03 01:55:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29710 states to 29710 states and 43008 transitions. [2022-11-03 01:55:21,258 INFO L78 Accepts]: Start accepts. Automaton has 29710 states and 43008 transitions. Word has length 290 [2022-11-03 01:55:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:21,260 INFO L495 AbstractCegarLoop]: Abstraction has 29710 states and 43008 transitions. [2022-11-03 01:55:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-03 01:55:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 29710 states and 43008 transitions. [2022-11-03 01:55:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-03 01:55:21,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:21,291 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:55:21,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:55:21,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 985796537, now seen corresponding path program 1 times [2022-11-03 01:55:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589885006] [2022-11-03 01:55:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:21,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 994 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-11-03 01:55:22,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:22,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589885006] [2022-11-03 01:55:22,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589885006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:22,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:22,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:55:22,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491486582] [2022-11-03 01:55:22,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:55:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:55:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:55:22,633 INFO L87 Difference]: Start difference. First operand 29710 states and 43008 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-03 01:55:24,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:26,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:29,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:32,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:37,165 INFO L93 Difference]: Finished difference Result 80199 states and 116254 transitions. [2022-11-03 01:55:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:55:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 331 [2022-11-03 01:55:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:37,492 INFO L225 Difference]: With dead ends: 80199 [2022-11-03 01:55:37,493 INFO L226 Difference]: Without dead ends: 50549 [2022-11-03 01:55:37,619 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 01:55:37,620 INFO L413 NwaCegarLoop]: 3949 mSDtfsCounter, 2282 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2282 SdHoareTripleChecker+Valid, 6188 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:55:37,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2282 Valid, 6188 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 851 Invalid, 2 Unknown, 0 Unchecked, 12.7s Time] [2022-11-03 01:55:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50549 states. [2022-11-03 01:55:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50549 to 50294. [2022-11-03 01:55:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 32202 states have (on average 1.344792248928638) internal successors, (43305), 32977 states have internal predecessors, (43305), 13802 states have call successors, (13802), 4296 states have call predecessors, (13802), 4289 states have return successors, (15894), 13275 states have call predecessors, (15894), 13800 states have call successors, (15894) [2022-11-03 01:55:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 73001 transitions. [2022-11-03 01:55:40,804 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 73001 transitions. Word has length 331 [2022-11-03 01:55:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:55:40,805 INFO L495 AbstractCegarLoop]: Abstraction has 50294 states and 73001 transitions. [2022-11-03 01:55:40,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-03 01:55:40,805 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 73001 transitions. [2022-11-03 01:55:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-11-03 01:55:40,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:55:40,928 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:40,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:55:40,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:55:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:55:40,929 INFO L85 PathProgramCache]: Analyzing trace with hash -806240368, now seen corresponding path program 1 times [2022-11-03 01:55:40,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:55:40,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043343472] [2022-11-03 01:55:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:55:40,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:55:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:55:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2022-11-03 01:55:42,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:55:42,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043343472] [2022-11-03 01:55:42,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043343472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:55:42,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:55:42,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:55:42,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965079074] [2022-11-03 01:55:42,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:55:42,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:55:42,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:55:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:55:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:55:42,111 INFO L87 Difference]: Start difference. First operand 50294 states and 73001 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-03 01:55:44,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:46,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:49,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:51,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:53,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:55:59,529 INFO L93 Difference]: Finished difference Result 100240 states and 145521 transitions. [2022-11-03 01:55:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:55:59,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 363 [2022-11-03 01:55:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:55:59,812 INFO L225 Difference]: With dead ends: 100240 [2022-11-03 01:55:59,812 INFO L226 Difference]: Without dead ends: 50315 [2022-11-03 01:56:00,031 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 01:56:00,032 INFO L413 NwaCegarLoop]: 2252 mSDtfsCounter, 8 mSDsluCounter, 5116 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6750 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:00,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6750 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 936 Invalid, 3 Unknown, 0 Unchecked, 15.1s Time] [2022-11-03 01:56:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50315 states. [2022-11-03 01:56:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50315 to 50296. [2022-11-03 01:56:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50296 states, 32204 states have (on average 1.3443982114023103) internal successors, (43295), 32979 states have internal predecessors, (43295), 13802 states have call successors, (13802), 4296 states have call predecessors, (13802), 4289 states have return successors, (15894), 13275 states have call predecessors, (15894), 13800 states have call successors, (15894) [2022-11-03 01:56:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50296 states to 50296 states and 72991 transitions. [2022-11-03 01:56:02,788 INFO L78 Accepts]: Start accepts. Automaton has 50296 states and 72991 transitions. Word has length 363 [2022-11-03 01:56:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:02,799 INFO L495 AbstractCegarLoop]: Abstraction has 50296 states and 72991 transitions. [2022-11-03 01:56:02,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-03 01:56:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 50296 states and 72991 transitions. [2022-11-03 01:56:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-03 01:56:02,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:02,947 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:02,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:56:02,947 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1392212489, now seen corresponding path program 1 times [2022-11-03 01:56:02,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:02,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126894000] [2022-11-03 01:56:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:02,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1576 trivial. 0 not checked. [2022-11-03 01:56:03,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:03,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126894000] [2022-11-03 01:56:03,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126894000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:03,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:03,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:03,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160258837] [2022-11-03 01:56:03,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:03,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:03,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:03,975 INFO L87 Difference]: Start difference. First operand 50296 states and 72991 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-03 01:56:06,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:08,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:17,609 INFO L93 Difference]: Finished difference Result 111822 states and 162731 transitions. [2022-11-03 01:56:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 375 [2022-11-03 01:56:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:18,067 INFO L225 Difference]: With dead ends: 111822 [2022-11-03 01:56:18,067 INFO L226 Difference]: Without dead ends: 70223 [2022-11-03 01:56:18,298 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 01:56:18,299 INFO L413 NwaCegarLoop]: 2782 mSDtfsCounter, 2433 mSDsluCounter, 2565 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2433 SdHoareTripleChecker+Valid, 5042 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:18,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2433 Valid, 5042 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 652 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2022-11-03 01:56:18,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70223 states. [2022-11-03 01:56:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70223 to 70106. [2022-11-03 01:56:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70106 states, 44832 states have (on average 1.3436384725196289) internal successors, (60238), 45934 states have internal predecessors, (60238), 19248 states have call successors, (19248), 6030 states have call predecessors, (19248), 6025 states have return successors, (22590), 18497 states have call predecessors, (22590), 19246 states have call successors, (22590) [2022-11-03 01:56:22,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70106 states to 70106 states and 102076 transitions. [2022-11-03 01:56:22,438 INFO L78 Accepts]: Start accepts. Automaton has 70106 states and 102076 transitions. Word has length 375 [2022-11-03 01:56:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:22,440 INFO L495 AbstractCegarLoop]: Abstraction has 70106 states and 102076 transitions. [2022-11-03 01:56:22,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-11-03 01:56:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 70106 states and 102076 transitions. [2022-11-03 01:56:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-11-03 01:56:22,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:22,531 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:56:22,531 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash -301203564, now seen corresponding path program 1 times [2022-11-03 01:56:22,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:22,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528295402] [2022-11-03 01:56:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2022-11-03 01:56:23,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528295402] [2022-11-03 01:56:23,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528295402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:23,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:23,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829605863] [2022-11-03 01:56:23,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:23,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:23,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:23,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:23,624 INFO L87 Difference]: Start difference. First operand 70106 states and 102076 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-03 01:56:25,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:27,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:30,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:31,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:34,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:38,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:56:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:43,931 INFO L93 Difference]: Finished difference Result 158282 states and 231064 transitions. [2022-11-03 01:56:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 368 [2022-11-03 01:56:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:44,716 INFO L225 Difference]: With dead ends: 158282 [2022-11-03 01:56:44,716 INFO L226 Difference]: Without dead ends: 96873 [2022-11-03 01:56:44,967 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 01:56:44,968 INFO L413 NwaCegarLoop]: 2928 mSDtfsCounter, 2301 mSDsluCounter, 2521 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2301 SdHoareTripleChecker+Valid, 5148 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:44,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2301 Valid, 5148 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 688 Invalid, 2 Unknown, 0 Unchecked, 16.1s Time] [2022-11-03 01:56:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96873 states. [2022-11-03 01:56:49,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96873 to 96676. [2022-11-03 01:56:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96676 states, 61864 states have (on average 1.3442713047976207) internal successors, (83162), 63338 states have internal predecessors, (83162), 26520 states have call successors, (26520), 8308 states have call predecessors, (26520), 8291 states have return successors, (31554), 25509 states have call predecessors, (31554), 26518 states have call successors, (31554) [2022-11-03 01:56:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96676 states to 96676 states and 141236 transitions. [2022-11-03 01:56:50,300 INFO L78 Accepts]: Start accepts. Automaton has 96676 states and 141236 transitions. Word has length 368 [2022-11-03 01:56:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:50,301 INFO L495 AbstractCegarLoop]: Abstraction has 96676 states and 141236 transitions. [2022-11-03 01:56:50,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-03 01:56:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 96676 states and 141236 transitions. [2022-11-03 01:56:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-11-03 01:56:50,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:50,403 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 12, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:50,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 01:56:50,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:56:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:50,404 INFO L85 PathProgramCache]: Analyzing trace with hash 951402750, now seen corresponding path program 1 times [2022-11-03 01:56:50,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:50,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425282775] [2022-11-03 01:56:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:50,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1566 trivial. 0 not checked. [2022-11-03 01:56:55,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425282775] [2022-11-03 01:56:55,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425282775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:55,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571817060] [2022-11-03 01:56:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:55,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:55,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:55,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:55,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:56:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 7578 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:56:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 666 proven. 0 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-11-03 01:56:58,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:58,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571817060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:58,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:58,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-03 01:56:58,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108672057] [2022-11-03 01:56:58,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:58,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:56:58,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:56:58,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:56:58,536 INFO L87 Difference]: Start difference. First operand 96676 states and 141236 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2022-11-03 01:57:00,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:02,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:06,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:07,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:12,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:20,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:20,438 INFO L93 Difference]: Finished difference Result 157998 states and 230679 transitions. [2022-11-03 01:57:20,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:57:20,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) Word has length 368 [2022-11-03 01:57:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:21,112 INFO L225 Difference]: With dead ends: 157998 [2022-11-03 01:57:21,112 INFO L226 Difference]: Without dead ends: 61566 [2022-11-03 01:57:21,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:57:21,460 INFO L413 NwaCegarLoop]: 2257 mSDtfsCounter, 19 mSDsluCounter, 7666 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 9001 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:21,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 9001 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1251 Invalid, 2 Unknown, 0 Unchecked, 18.4s Time] [2022-11-03 01:57:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61566 states. [2022-11-03 01:57:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61566 to 61346. [2022-11-03 01:57:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61346 states, 39228 states have (on average 1.3448047313143674) internal successors, (52754), 40204 states have internal predecessors, (52754), 16863 states have call successors, (16863), 5259 states have call predecessors, (16863), 5254 states have return successors, (19931), 16191 states have call predecessors, (19931), 16861 states have call successors, (19931) [2022-11-03 01:57:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61346 states to 61346 states and 89548 transitions. [2022-11-03 01:57:24,670 INFO L78 Accepts]: Start accepts. Automaton has 61346 states and 89548 transitions. Word has length 368 [2022-11-03 01:57:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:24,671 INFO L495 AbstractCegarLoop]: Abstraction has 61346 states and 89548 transitions. [2022-11-03 01:57:24,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2022-11-03 01:57:24,671 INFO L276 IsEmpty]: Start isEmpty. Operand 61346 states and 89548 transitions. [2022-11-03 01:57:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-03 01:57:24,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:24,728 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 12, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:24,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:24,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:24,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:24,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1564723579, now seen corresponding path program 1 times [2022-11-03 01:57:24,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:24,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598914005] [2022-11-03 01:57:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:24,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1762 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2022-11-03 01:57:27,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:27,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598914005] [2022-11-03 01:57:27,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598914005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:57:27,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:57:27,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:57:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364857777] [2022-11-03 01:57:27,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:57:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:57:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:57:27,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:57:27,090 INFO L87 Difference]: Start difference. First operand 61346 states and 89548 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-03 01:57:29,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:31,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:34,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:39,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 01:57:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:44,366 INFO L93 Difference]: Finished difference Result 122321 states and 178592 transitions. [2022-11-03 01:57:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:57:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 405 [2022-11-03 01:57:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:44,777 INFO L225 Difference]: With dead ends: 122321 [2022-11-03 01:57:44,777 INFO L226 Difference]: Without dead ends: 61364 [2022-11-03 01:57:45,021 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 01:57:45,023 INFO L413 NwaCegarLoop]: 2267 mSDtfsCounter, 19 mSDsluCounter, 5114 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6770 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:45,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 6770 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 938 Invalid, 2 Unknown, 0 Unchecked, 14.4s Time] [2022-11-03 01:57:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61364 states. [2022-11-03 01:57:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61364 to 61350. [2022-11-03 01:57:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61350 states, 39232 states have (on average 1.3447185970636215) internal successors, (52756), 40208 states have internal predecessors, (52756), 16863 states have call successors, (16863), 5259 states have call predecessors, (16863), 5254 states have return successors, (19931), 16191 states have call predecessors, (19931), 16861 states have call successors, (19931) [2022-11-03 01:57:48,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61350 states to 61350 states and 89550 transitions. [2022-11-03 01:57:48,537 INFO L78 Accepts]: Start accepts. Automaton has 61350 states and 89550 transitions. Word has length 405 [2022-11-03 01:57:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:48,539 INFO L495 AbstractCegarLoop]: Abstraction has 61350 states and 89550 transitions. [2022-11-03 01:57:48,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2022-11-03 01:57:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 61350 states and 89550 transitions. [2022-11-03 01:57:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-11-03 01:57:48,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:48,596 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 12, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:57:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 01:57:48,597 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:57:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1454534992, now seen corresponding path program 1 times [2022-11-03 01:57:48,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:48,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53070868] [2022-11-03 01:57:48,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:48,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1948 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-11-03 01:57:54,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:54,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53070868] [2022-11-03 01:57:54,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53070868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:54,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483978647] [2022-11-03 01:57:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:54,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:54,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:54,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25926ab9-fad3-487d-b40a-3e49d6e2b377/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process