./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7 --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 3be4ac024b7f357f41d231fb5742f86a984717c473cc6044544e39e88c4f03b3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:11:04,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:11:04,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:11:04,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:11:04,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:11:04,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:11:04,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:11:04,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:11:04,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:11:04,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:11:04,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:11:04,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:11:04,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:11:04,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:11:04,133 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:11:04,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:11:04,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:11:04,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:11:04,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:11:04,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:11:04,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:11:04,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:11:04,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:11:04,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:11:04,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:11:04,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:11:04,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:11:04,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:11:04,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:11:04,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:11:04,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:11:04,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:11:04,187 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:11:04,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:11:04,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:11:04,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:11:04,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:11:04,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:11:04,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:11:04,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:11:04,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:11:04,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:11:04,257 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:11:04,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:11:04,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:11:04,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:11:04,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:11:04,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:11:04,278 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:11:04,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:11:04,279 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:11:04,279 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:11:04,280 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:11:04,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:11:04,281 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:11:04,281 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:11:04,281 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:11:04,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:11:04,282 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:11:04,282 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:11:04,283 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:11:04,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:11:04,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:11:04,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:11:04,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:11:04,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:11:04,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:11:04,285 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:11:04,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:11:04,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:11:04,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:11:04,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:11:04,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:11:04,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:11:04,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:11:04,290 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:11:04,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:11:04,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:11:04,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:11:04,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:11:04,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3be4ac024b7f357f41d231fb5742f86a984717c473cc6044544e39e88c4f03b3 [2021-11-25 18:11:04,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:11:04,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:11:04,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:11:04,602 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:11:04,603 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:11:04,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-25 18:11:04,667 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/data/6c627477f/dccc7ec4a7e64cd9ac8c2f0efebef203/FLAG70ccb616c [2021-11-25 18:11:05,684 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:11:05,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-25 18:11:05,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/data/6c627477f/dccc7ec4a7e64cd9ac8c2f0efebef203/FLAG70ccb616c [2021-11-25 18:11:06,005 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/data/6c627477f/dccc7ec4a7e64cd9ac8c2f0efebef203 [2021-11-25 18:11:06,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:11:06,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:11:06,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:11:06,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:11:06,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:11:06,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:06" (1/1) ... [2021-11-25 18:11:06,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b1751c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:06, skipping insertion in model container [2021-11-25 18:11:06,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:11:06" (1/1) ... [2021-11-25 18:11:06,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:11:06,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:11:08,824 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_07308d1b-ad89-4676-b844-40a15fa8d205/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i[293856,293869] [2021-11-25 18:11:08,888 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-25 18:11:08,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:11:08,956 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:11:09,476 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_07308d1b-ad89-4676-b844-40a15fa8d205/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i[293856,293869] [2021-11-25 18:11:09,480 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-25 18:11:09,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:11:09,608 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:11:09,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09 WrapperNode [2021-11-25 18:11:09,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:11:09,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:11:09,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:11:09,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:11:09,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:09,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:09,989 INFO L137 Inliner]: procedures = 275, calls = 1982, calls flagged for inlining = 131, calls inlined = 123, statements flattened = 4568 [2021-11-25 18:11:09,990 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:11:09,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:11:09,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:11:09,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:11:10,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:11:10,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:11:10,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:11:10,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:11:10,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (1/1) ... [2021-11-25 18:11:10,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:11:10,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:11:10,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:11:10,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:11:10,459 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-25 18:11:10,460 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-25 18:11:10,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_shutdown_2 [2021-11-25 18:11:10,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_shutdown_2 [2021-11-25 18:11:10,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 18:11:10,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:11:10,461 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-11-25 18:11:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-11-25 18:11:10,461 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:11:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:11:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:11:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:11:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-25 18:11:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-25 18:11:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-25 18:11:10,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-25 18:11:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure rd_get_count [2021-11-25 18:11:10,463 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_get_count [2021-11-25 18:11:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:11:10,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:11:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2021-11-25 18:11:10,464 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2021-11-25 18:11:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure rd_set_status [2021-11-25 18:11:10,464 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_set_status [2021-11-25 18:11:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-25 18:11:10,465 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-25 18:11:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure rd_get_status [2021-11-25 18:11:10,465 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_get_status [2021-11-25 18:11:10,465 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_cpu [2021-11-25 18:11:10,466 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_cpu [2021-11-25 18:11:10,466 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 18:11:10,466 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 18:11:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 18:11:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 18:11:10,467 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_ring_debug [2021-11-25 18:11:10,467 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_ring_debug [2021-11-25 18:11:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-25 18:11:10,468 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-25 18:11:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-25 18:11:10,468 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-25 18:11:10,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:11:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:11:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:11:10,469 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:11:10,469 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-25 18:11:10,470 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-25 18:11:10,470 INFO L130 BoogieDeclarations]: Found specification of procedure pci_name [2021-11-25 18:11:10,471 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_name [2021-11-25 18:11:10,472 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2021-11-25 18:11:10,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2021-11-25 18:11:10,473 INFO L130 BoogieDeclarations]: Found specification of procedure ring_get [2021-11-25 18:11:10,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_get [2021-11-25 18:11:10,473 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-25 18:11:10,474 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-25 18:11:10,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:11:10,474 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_irda_resume [2021-11-25 18:11:10,475 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_irda_resume [2021-11-25 18:11:10,475 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-25 18:11:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-25 18:11:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:11:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-25 18:11:10,476 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-25 18:11:10,476 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2021-11-25 18:11:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure remove_proc_entry [2021-11-25 18:11:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_proc_entry [2021-11-25 18:11:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_us_delta [2021-11-25 18:11:10,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_us_delta [2021-11-25 18:11:10,477 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 18:11:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 18:11:10,478 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_free_ring [2021-11-25 18:11:10,478 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_free_ring [2021-11-25 18:11:10,479 INFO L130 BoogieDeclarations]: Found specification of procedure ring_last [2021-11-25 18:11:10,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_last [2021-11-25 18:11:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-25 18:11:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-25 18:11:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:11:10,480 INFO L130 BoogieDeclarations]: Found specification of procedure ring_put [2021-11-25 18:11:10,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_put [2021-11-25 18:11:10,481 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-11-25 18:11:10,481 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-11-25 18:11:10,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:11:10,482 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-25 18:11:10,482 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-25 18:11:10,482 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-25 18:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-25 18:11:10,483 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 18:11:10,483 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 18:11:10,484 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_tx_timeout [2021-11-25 18:11:10,484 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_tx_timeout [2021-11-25 18:11:10,485 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-25 18:11:10,485 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-25 18:11:10,486 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 18:11:10,486 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 18:11:10,487 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-25 18:11:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-25 18:11:10,487 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-25 18:11:10,487 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-25 18:11:10,487 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-25 18:11:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-25 18:11:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure rd_set_addr_status [2021-11-25 18:11:10,488 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_set_addr_status [2021-11-25 18:11:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 18:11:10,488 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_destroy_hwif [2021-11-25 18:11:10,489 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_destroy_hwif [2021-11-25 18:11:10,489 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-25 18:11:10,489 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-25 18:11:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:11:10,490 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_stop_hw [2021-11-25 18:11:10,491 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_stop_hw [2021-11-25 18:11:10,492 INFO L130 BoogieDeclarations]: Found specification of procedure rd_get_addr [2021-11-25 18:11:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_get_addr [2021-11-25 18:11:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:11:10,495 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-25 18:11:10,495 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-25 18:11:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-25 18:11:10,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-25 18:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_irda_remove [2021-11-25 18:11:10,499 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_irda_remove [2021-11-25 18:11:10,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 18:11:10,504 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 18:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure pci_choose_state [2021-11-25 18:11:10,505 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_choose_state [2021-11-25 18:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_clear_regs [2021-11-25 18:11:10,505 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_clear_regs [2021-11-25 18:11:10,505 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 18:11:10,506 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 18:11:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-25 18:11:10,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-25 18:11:10,506 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_dma_mask [2021-11-25 18:11:10,506 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_dma_mask [2021-11-25 18:11:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 18:11:10,507 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 18:11:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_start_hw [2021-11-25 18:11:10,507 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_start_hw [2021-11-25 18:11:10,507 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-25 18:11:10,507 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-25 18:11:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:11:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-25 18:11:10,508 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-25 18:11:10,508 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-11-25 18:11:10,508 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-11-25 18:11:10,509 INFO L130 BoogieDeclarations]: Found specification of procedure rd_activate [2021-11-25 18:11:10,509 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_activate [2021-11-25 18:11:10,509 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-25 18:11:10,509 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-25 18:11:10,509 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 18:11:10,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 18:11:10,510 INFO L130 BoogieDeclarations]: Found specification of procedure rd_is_active [2021-11-25 18:11:10,510 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_is_active [2021-11-25 18:11:10,514 INFO L130 BoogieDeclarations]: Found specification of procedure irlap_close [2021-11-25 18:11:10,514 INFO L138 BoogieDeclarations]: Found implementation of procedure irlap_close [2021-11-25 18:11:10,514 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 18:11:10,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 18:11:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:11:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure rd_set_count [2021-11-25 18:11:10,515 INFO L138 BoogieDeclarations]: Found implementation of procedure rd_set_count [2021-11-25 18:11:10,515 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 18:11:10,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 18:11:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-25 18:11:10,516 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-25 18:11:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:11:10,516 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-25 18:11:10,517 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-25 18:11:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-25 18:11:10,517 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-25 18:11:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:11:10,517 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 18:11:10,518 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_process_tx [2021-11-25 18:11:10,518 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_process_tx [2021-11-25 18:11:10,518 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-25 18:11:10,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-25 18:11:10,518 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_ioctl [2021-11-25 18:11:10,518 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_ioctl [2021-11-25 18:11:10,519 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_early_2 [2021-11-25 18:11:10,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_early_2 [2021-11-25 18:11:10,519 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 18:11:10,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~dma_addr_t~0~X~int~X~int~TO~VOID [2021-11-25 18:11:10,519 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_alloc_ring [2021-11-25 18:11:10,520 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_alloc_ring [2021-11-25 18:11:10,520 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_fill_rx [2021-11-25 18:11:10,520 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_fill_rx [2021-11-25 18:11:10,520 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-11-25 18:11:10,520 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-11-25 18:11:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_process_rx [2021-11-25 18:11:10,521 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_process_rx [2021-11-25 18:11:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-25 18:11:10,521 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-25 18:11:10,521 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_reg_debug [2021-11-25 18:11:10,522 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_reg_debug [2021-11-25 18:11:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:11:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure vlsi_set_baud [2021-11-25 18:11:10,522 INFO L138 BoogieDeclarations]: Found implementation of procedure vlsi_set_baud [2021-11-25 18:11:10,522 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-25 18:11:10,523 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-25 18:11:10,523 INFO L130 BoogieDeclarations]: Found specification of procedure ring_first [2021-11-25 18:11:10,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ring_first [2021-11-25 18:11:10,523 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_sync_single_for_device [2021-11-25 18:11:10,523 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_sync_single_for_device [2021-11-25 18:11:10,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:11:10,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:11:11,471 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:11:11,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:11:11,948 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:11:19,531 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:11:20,693 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:11:20,694 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:11:20,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:20 BoogieIcfgContainer [2021-11-25 18:11:20,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:11:20,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:11:20,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:11:20,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:11:20,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:11:06" (1/3) ... [2021-11-25 18:11:20,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fba01d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:20, skipping insertion in model container [2021-11-25 18:11:20,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:11:09" (2/3) ... [2021-11-25 18:11:20,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fba01d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:11:20, skipping insertion in model container [2021-11-25 18:11:20,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:11:20" (3/3) ... [2021-11-25 18:11:20,708 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--irda--vlsi_ir.ko-entry_point.cil.out.i [2021-11-25 18:11:20,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:11:20,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:11:20,784 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:11:20,793 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:11:20,793 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:11:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 1228 states, 727 states have (on average 1.2943603851444292) internal successors, (941), 753 states have internal predecessors, (941), 409 states have call successors, (409), 91 states have call predecessors, (409), 90 states have return successors, (402), 401 states have call predecessors, (402), 402 states have call successors, (402) [2021-11-25 18:11:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-25 18:11:20,895 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:20,896 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:11:20,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash -306098764, now seen corresponding path program 1 times [2021-11-25 18:11:20,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003147753] [2021-11-25 18:11:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:20,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-25 18:11:21,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:21,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003147753] [2021-11-25 18:11:21,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003147753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:21,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:21,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:11:21,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015380832] [2021-11-25 18:11:21,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:21,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:11:21,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:11:21,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:11:21,926 INFO L87 Difference]: Start difference. First operand has 1228 states, 727 states have (on average 1.2943603851444292) internal successors, (941), 753 states have internal predecessors, (941), 409 states have call successors, (409), 91 states have call predecessors, (409), 90 states have return successors, (402), 401 states have call predecessors, (402), 402 states have call successors, (402) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 18:11:24,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:11:28,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:11:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:29,181 INFO L93 Difference]: Finished difference Result 3233 states and 4633 transitions. [2021-11-25 18:11:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:11:29,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-25 18:11:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:29,226 INFO L225 Difference]: With dead ends: 3233 [2021-11-25 18:11:29,227 INFO L226 Difference]: Without dead ends: 1999 [2021-11-25 18:11:29,246 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:11:29,250 INFO L933 BasicCegarLoop]: 1800 mSDtfsCounter, 1144 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1144 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:29,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1144 Valid, 3287 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 449 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-25 18:11:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2021-11-25 18:11:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1995. [2021-11-25 18:11:29,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1187 states have (on average 1.2771693344566133) internal successors, (1516), 1212 states have internal predecessors, (1516), 650 states have call successors, (650), 158 states have call predecessors, (650), 157 states have return successors, (653), 646 states have call predecessors, (653), 649 states have call successors, (653) [2021-11-25 18:11:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2819 transitions. [2021-11-25 18:11:29,517 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 2819 transitions. Word has length 131 [2021-11-25 18:11:29,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:29,519 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 2819 transitions. [2021-11-25 18:11:29,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 18:11:29,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 2819 transitions. [2021-11-25 18:11:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-25 18:11:29,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:29,537 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:11:29,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:11:29,538 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash -79676592, now seen corresponding path program 1 times [2021-11-25 18:11:29,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:29,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212496533] [2021-11-25 18:11:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:29,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:11:30,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:30,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212496533] [2021-11-25 18:11:30,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212496533] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:30,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:30,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:11:30,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456678018] [2021-11-25 18:11:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:30,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:11:30,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:30,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:11:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:11:30,292 INFO L87 Difference]: Start difference. First operand 1995 states and 2819 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:11:32,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:11:35,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:11:37,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:11:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:41,781 INFO L93 Difference]: Finished difference Result 5852 states and 8264 transitions. [2021-11-25 18:11:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:11:41,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 185 [2021-11-25 18:11:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:41,829 INFO L225 Difference]: With dead ends: 5852 [2021-11-25 18:11:41,829 INFO L226 Difference]: Without dead ends: 3882 [2021-11-25 18:11:41,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:11:41,848 INFO L933 BasicCegarLoop]: 2102 mSDtfsCounter, 1546 mSDsluCounter, 6378 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 7773 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:41,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 7773 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 991 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2021-11-25 18:11:41,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-11-25 18:11:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3858. [2021-11-25 18:11:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 2296 states have (on average 1.279616724738676) internal successors, (2938), 2354 states have internal predecessors, (2938), 1249 states have call successors, (1249), 313 states have call predecessors, (1249), 312 states have return successors, (1256), 1233 states have call predecessors, (1256), 1248 states have call successors, (1256) [2021-11-25 18:11:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5443 transitions. [2021-11-25 18:11:42,224 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5443 transitions. Word has length 185 [2021-11-25 18:11:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:42,225 INFO L470 AbstractCegarLoop]: Abstraction has 3858 states and 5443 transitions. [2021-11-25 18:11:42,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:11:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5443 transitions. [2021-11-25 18:11:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-25 18:11:42,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:42,237 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:11:42,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:11:42,242 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:42,243 INFO L85 PathProgramCache]: Analyzing trace with hash -553608569, now seen corresponding path program 1 times [2021-11-25 18:11:42,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:42,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96155305] [2021-11-25 18:11:42,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:42,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:11:42,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:42,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96155305] [2021-11-25 18:11:42,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96155305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:42,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:42,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:11:42,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875894568] [2021-11-25 18:11:42,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:42,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:11:42,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:42,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:11:42,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:11:42,681 INFO L87 Difference]: Start difference. First operand 3858 states and 5443 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:11:44,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:11:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:11:52,872 INFO L93 Difference]: Finished difference Result 8416 states and 11795 transitions. [2021-11-25 18:11:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:11:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 188 [2021-11-25 18:11:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:11:52,927 INFO L225 Difference]: With dead ends: 8416 [2021-11-25 18:11:52,928 INFO L226 Difference]: Without dead ends: 5758 [2021-11-25 18:11:52,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:11:52,948 INFO L933 BasicCegarLoop]: 1903 mSDtfsCounter, 1540 mSDsluCounter, 5914 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 7174 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:11:52,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 7174 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 891 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2021-11-25 18:11:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5758 states. [2021-11-25 18:11:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5758 to 5724. [2021-11-25 18:11:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5724 states, 3411 states have (on average 1.279683377308707) internal successors, (4365), 3492 states have internal predecessors, (4365), 1846 states have call successors, (1846), 467 states have call predecessors, (1846), 466 states have return successors, (1857), 1828 states have call predecessors, (1857), 1845 states have call successors, (1857) [2021-11-25 18:11:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5724 states to 5724 states and 8068 transitions. [2021-11-25 18:11:53,421 INFO L78 Accepts]: Start accepts. Automaton has 5724 states and 8068 transitions. Word has length 188 [2021-11-25 18:11:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:11:53,422 INFO L470 AbstractCegarLoop]: Abstraction has 5724 states and 8068 transitions. [2021-11-25 18:11:53,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:11:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5724 states and 8068 transitions. [2021-11-25 18:11:53,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-25 18:11:53,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:11:53,433 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:11:53,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:11:53,434 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:11:53,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:11:53,439 INFO L85 PathProgramCache]: Analyzing trace with hash 58142163, now seen corresponding path program 1 times [2021-11-25 18:11:53,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:11:53,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019234870] [2021-11-25 18:11:53,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:11:53,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:11:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:11:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:11:53,736 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:11:53,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019234870] [2021-11-25 18:11:53,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019234870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:11:53,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:11:53,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:11:53,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483191224] [2021-11-25 18:11:53,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:11:53,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:11:53,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:11:53,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:11:53,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:11:53,741 INFO L87 Difference]: Start difference. First operand 5724 states and 8068 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:11:55,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:11:59,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:00,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:01,899 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:07,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:12:07,226 INFO L93 Difference]: Finished difference Result 10292 states and 14424 transitions. [2021-11-25 18:12:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:12:07,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 187 [2021-11-25 18:12:07,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:12:07,283 INFO L225 Difference]: With dead ends: 10292 [2021-11-25 18:12:07,283 INFO L226 Difference]: Without dead ends: 5766 [2021-11-25 18:12:07,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:12:07,310 INFO L933 BasicCegarLoop]: 1903 mSDtfsCounter, 1540 mSDsluCounter, 5914 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 7174 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:12:07,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 7174 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 891 Invalid, 1 Unknown, 0 Unchecked, 13.2s Time] [2021-11-25 18:12:07,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-11-25 18:12:07,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5732. [2021-11-25 18:12:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5732 states, 3419 states have (on average 1.2790289558350394) internal successors, (4373), 3498 states have internal predecessors, (4373), 1844 states have call successors, (1844), 469 states have call predecessors, (1844), 468 states have return successors, (1855), 1828 states have call predecessors, (1855), 1843 states have call successors, (1855) [2021-11-25 18:12:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5732 states to 5732 states and 8072 transitions. [2021-11-25 18:12:07,653 INFO L78 Accepts]: Start accepts. Automaton has 5732 states and 8072 transitions. Word has length 187 [2021-11-25 18:12:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:12:07,654 INFO L470 AbstractCegarLoop]: Abstraction has 5732 states and 8072 transitions. [2021-11-25 18:12:07,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:12:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5732 states and 8072 transitions. [2021-11-25 18:12:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-25 18:12:07,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:12:07,664 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:12:07,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:12:07,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:12:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:12:07,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1908911268, now seen corresponding path program 1 times [2021-11-25 18:12:07,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:12:07,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959025345] [2021-11-25 18:12:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:12:07,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:12:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:12:07,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:12:07,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959025345] [2021-11-25 18:12:07,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959025345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:12:07,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:12:07,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:12:07,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981115570] [2021-11-25 18:12:07,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:12:07,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:12:07,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:12:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:12:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:12:07,935 INFO L87 Difference]: Start difference. First operand 5732 states and 8072 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:12:09,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:12:16,341 INFO L93 Difference]: Finished difference Result 10104 states and 14123 transitions. [2021-11-25 18:12:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:12:16,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 186 [2021-11-25 18:12:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:12:16,508 INFO L225 Difference]: With dead ends: 10104 [2021-11-25 18:12:16,508 INFO L226 Difference]: Without dead ends: 5568 [2021-11-25 18:12:16,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:12:16,530 INFO L933 BasicCegarLoop]: 1903 mSDtfsCounter, 1540 mSDsluCounter, 5914 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1544 SdHoareTripleChecker+Valid, 7174 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:12:16,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1544 Valid, 7174 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 891 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-25 18:12:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2021-11-25 18:12:16,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5540. [2021-11-25 18:12:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 3306 states have (on average 1.2770719903206291) internal successors, (4222), 3375 states have internal predecessors, (4222), 1769 states have call successors, (1769), 465 states have call predecessors, (1769), 464 states have return successors, (1780), 1757 states have call predecessors, (1780), 1768 states have call successors, (1780) [2021-11-25 18:12:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 7771 transitions. [2021-11-25 18:12:16,897 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 7771 transitions. Word has length 186 [2021-11-25 18:12:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:12:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 5540 states and 7771 transitions. [2021-11-25 18:12:16,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (31), 3 states have call predecessors, (31), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2021-11-25 18:12:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 7771 transitions. [2021-11-25 18:12:16,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-25 18:12:16,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:12:16,910 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:12:16,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:12:16,911 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:12:16,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:12:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1146557114, now seen corresponding path program 1 times [2021-11-25 18:12:16,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:12:16,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794312321] [2021-11-25 18:12:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:12:16,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:12:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-25 18:12:17,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:12:17,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794312321] [2021-11-25 18:12:17,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794312321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:12:17,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010410159] [2021-11-25 18:12:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:12:17,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:12:17,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:12:17,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:12:17,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:12:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 3715 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:12:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:12:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:12:18,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:12:18,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010410159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:12:18,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:12:18,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-25 18:12:18,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128313283] [2021-11-25 18:12:18,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:12:18,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:12:18,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:12:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:12:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:12:18,831 INFO L87 Difference]: Start difference. First operand 5540 states and 7771 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:12:20,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:30,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:41,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:12:41,447 INFO L93 Difference]: Finished difference Result 13006 states and 18244 transitions. [2021-11-25 18:12:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:12:41,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 198 [2021-11-25 18:12:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:12:41,524 INFO L225 Difference]: With dead ends: 13006 [2021-11-25 18:12:41,524 INFO L226 Difference]: Without dead ends: 9148 [2021-11-25 18:12:41,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:12:41,548 INFO L933 BasicCegarLoop]: 2594 mSDtfsCounter, 1539 mSDsluCounter, 13513 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 14473 SdHoareTripleChecker+Invalid, 2073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:12:41,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 14473 Invalid, 2073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2071 Invalid, 1 Unknown, 0 Unchecked, 22.2s Time] [2021-11-25 18:12:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9148 states. [2021-11-25 18:12:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9148 to 9086. [2021-11-25 18:12:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9086 states, 5427 states have (on average 1.2782384374424176) internal successors, (6937), 5548 states have internal predecessors, (6937), 2888 states have call successors, (2888), 767 states have call predecessors, (2888), 770 states have return successors, (2917), 2864 states have call predecessors, (2917), 2887 states have call successors, (2917) [2021-11-25 18:12:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9086 states to 9086 states and 12742 transitions. [2021-11-25 18:12:42,186 INFO L78 Accepts]: Start accepts. Automaton has 9086 states and 12742 transitions. Word has length 198 [2021-11-25 18:12:42,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:12:42,187 INFO L470 AbstractCegarLoop]: Abstraction has 9086 states and 12742 transitions. [2021-11-25 18:12:42,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:12:42,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9086 states and 12742 transitions. [2021-11-25 18:12:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-25 18:12:42,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:12:42,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:12:42,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:12:42,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:12:42,419 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:12:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:12:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash -604278089, now seen corresponding path program 1 times [2021-11-25 18:12:42,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:12:42,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785352005] [2021-11-25 18:12:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:12:42,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:12:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:12:42,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:12:42,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785352005] [2021-11-25 18:12:42,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785352005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:12:42,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391102149] [2021-11-25 18:12:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:12:42,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:12:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:12:42,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:12:42,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:12:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:12:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 3717 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:12:43,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:12:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:12:44,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:12:44,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391102149] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:12:44,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:12:44,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-25 18:12:44,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535271088] [2021-11-25 18:12:44,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:12:44,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:12:44,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:12:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:12:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:12:44,345 INFO L87 Difference]: Start difference. First operand 9086 states and 12742 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:12:46,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:53,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:12:56,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:01,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:05,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:07,773 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:09,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:10,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:11,948 INFO L93 Difference]: Finished difference Result 20120 states and 28206 transitions. [2021-11-25 18:13:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:13:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 199 [2021-11-25 18:13:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:12,034 INFO L225 Difference]: With dead ends: 20120 [2021-11-25 18:13:12,035 INFO L226 Difference]: Without dead ends: 12716 [2021-11-25 18:13:12,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:13:12,084 INFO L933 BasicCegarLoop]: 2836 mSDtfsCounter, 1539 mSDsluCounter, 14617 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 15671 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:12,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 15671 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2259 Invalid, 1 Unknown, 0 Unchecked, 27.1s Time] [2021-11-25 18:13:12,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2021-11-25 18:13:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 12642. [2021-11-25 18:13:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12642 states, 7554 states have (on average 1.2785279322213396) internal successors, (9658), 7733 states have internal predecessors, (9658), 4007 states have call successors, (4007), 1069 states have call predecessors, (4007), 1080 states have return successors, (4060), 3969 states have call predecessors, (4060), 4006 states have call successors, (4060) [2021-11-25 18:13:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12642 states to 12642 states and 17725 transitions. [2021-11-25 18:13:12,984 INFO L78 Accepts]: Start accepts. Automaton has 12642 states and 17725 transitions. Word has length 199 [2021-11-25 18:13:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:12,985 INFO L470 AbstractCegarLoop]: Abstraction has 12642 states and 17725 transitions. [2021-11-25 18:13:12,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:13:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 12642 states and 17725 transitions. [2021-11-25 18:13:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-25 18:13:13,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:13,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:13:13,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:13:13,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:13:13,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2041693229, now seen corresponding path program 1 times [2021-11-25 18:13:13,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:13,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468169491] [2021-11-25 18:13:13,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:13,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:13:13,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:13,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468169491] [2021-11-25 18:13:13,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468169491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:13:13,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316640531] [2021-11-25 18:13:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:13,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:13,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:13:13,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:13:13,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:13:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 3719 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:13:14,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:13:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:13:14,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:13:14,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316640531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:14,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:13:14,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-25 18:13:14,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703430429] [2021-11-25 18:13:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:14,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:13:14,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:13:14,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:13:14,966 INFO L87 Difference]: Start difference. First operand 12642 states and 17725 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:13:16,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:34,886 INFO L93 Difference]: Finished difference Result 27228 states and 38164 transitions. [2021-11-25 18:13:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:13:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 200 [2021-11-25 18:13:34,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:34,966 INFO L225 Difference]: With dead ends: 27228 [2021-11-25 18:13:34,966 INFO L226 Difference]: Without dead ends: 16268 [2021-11-25 18:13:35,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:13:35,003 INFO L933 BasicCegarLoop]: 2836 mSDtfsCounter, 1539 mSDsluCounter, 14617 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 15671 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:35,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 15671 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2259 Invalid, 1 Unknown, 0 Unchecked, 19.5s Time] [2021-11-25 18:13:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16268 states. [2021-11-25 18:13:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16268 to 12644. [2021-11-25 18:13:35,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12644 states, 7556 states have (on average 1.278454208575966) internal successors, (9660), 7733 states have internal predecessors, (9660), 4007 states have call successors, (4007), 1069 states have call predecessors, (4007), 1080 states have return successors, (4060), 3971 states have call predecessors, (4060), 4006 states have call successors, (4060) [2021-11-25 18:13:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12644 states to 12644 states and 17727 transitions. [2021-11-25 18:13:35,778 INFO L78 Accepts]: Start accepts. Automaton has 12644 states and 17727 transitions. Word has length 200 [2021-11-25 18:13:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:35,779 INFO L470 AbstractCegarLoop]: Abstraction has 12644 states and 17727 transitions. [2021-11-25 18:13:35,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:13:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12644 states and 17727 transitions. [2021-11-25 18:13:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-25 18:13:35,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:35,794 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2021-11-25 18:13:35,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 18:13:36,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:36,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:36,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1182648894, now seen corresponding path program 1 times [2021-11-25 18:13:36,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:36,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703304562] [2021-11-25 18:13:36,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:36,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:13:36,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703304562] [2021-11-25 18:13:36,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703304562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:13:36,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217949045] [2021-11-25 18:13:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:36,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:13:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:13:36,292 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:13:36,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:13:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:37,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 3721 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:13:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:13:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-11-25 18:13:37,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:13:37,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217949045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:37,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:13:37,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-11-25 18:13:37,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571771525] [2021-11-25 18:13:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:13:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:37,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:13:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:13:37,594 INFO L87 Difference]: Start difference. First operand 12644 states and 17727 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:13:39,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:50,495 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:51,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:59,347 INFO L93 Difference]: Finished difference Result 27234 states and 38170 transitions. [2021-11-25 18:13:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:13:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 201 [2021-11-25 18:13:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:59,431 INFO L225 Difference]: With dead ends: 27234 [2021-11-25 18:13:59,432 INFO L226 Difference]: Without dead ends: 16272 [2021-11-25 18:13:59,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-25 18:13:59,474 INFO L933 BasicCegarLoop]: 2836 mSDtfsCounter, 1539 mSDsluCounter, 14617 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 15671 SdHoareTripleChecker+Invalid, 2261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:59,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 15671 Invalid, 2261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2259 Invalid, 1 Unknown, 0 Unchecked, 21.3s Time] [2021-11-25 18:13:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16272 states. [2021-11-25 18:14:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16272 to 12646. [2021-11-25 18:14:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12646 states, 7558 states have (on average 1.2783805239481345) internal successors, (9662), 7733 states have internal predecessors, (9662), 4007 states have call successors, (4007), 1069 states have call predecessors, (4007), 1080 states have return successors, (4060), 3973 states have call predecessors, (4060), 4006 states have call successors, (4060) [2021-11-25 18:14:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12646 states to 12646 states and 17729 transitions. [2021-11-25 18:14:00,258 INFO L78 Accepts]: Start accepts. Automaton has 12646 states and 17729 transitions. Word has length 201 [2021-11-25 18:14:00,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:00,258 INFO L470 AbstractCegarLoop]: Abstraction has 12646 states and 17729 transitions. [2021-11-25 18:14:00,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-25 18:14:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 12646 states and 17729 transitions. [2021-11-25 18:14:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-25 18:14:00,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:00,274 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 18:14:00,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:14:00,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:00,498 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:00,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1932416516, now seen corresponding path program 1 times [2021-11-25 18:14:00,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:00,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43050311] [2021-11-25 18:14:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:00,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-11-25 18:14:00,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:00,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43050311] [2021-11-25 18:14:00,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43050311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:00,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:00,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:14:00,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283734432] [2021-11-25 18:14:00,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:00,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:14:00,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:14:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:14:00,728 INFO L87 Difference]: Start difference. First operand 12646 states and 17729 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 18:14:02,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:08,569 INFO L93 Difference]: Finished difference Result 32990 states and 46057 transitions. [2021-11-25 18:14:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:14:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 201 [2021-11-25 18:14:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:08,678 INFO L225 Difference]: With dead ends: 32990 [2021-11-25 18:14:08,678 INFO L226 Difference]: Without dead ends: 20372 [2021-11-25 18:14:08,732 INFO L932 BasicCegarLoop]: 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 [2021-11-25 18:14:08,733 INFO L933 BasicCegarLoop]: 2319 mSDtfsCounter, 1337 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 3789 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:08,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1337 Valid, 3789 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 537 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2021-11-25 18:14:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20372 states. [2021-11-25 18:14:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20372 to 20355. [2021-11-25 18:14:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20355 states, 12168 states have (on average 1.2765450361604207) internal successors, (15533), 12491 states have internal predecessors, (15533), 6362 states have call successors, (6362), 1801 states have call predecessors, (6362), 1824 states have return successors, (6441), 6288 states have call predecessors, (6441), 6361 states have call successors, (6441) [2021-11-25 18:14:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20355 states to 20355 states and 28336 transitions. [2021-11-25 18:14:09,845 INFO L78 Accepts]: Start accepts. Automaton has 20355 states and 28336 transitions. Word has length 201 [2021-11-25 18:14:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:09,847 INFO L470 AbstractCegarLoop]: Abstraction has 20355 states and 28336 transitions. [2021-11-25 18:14:09,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-25 18:14:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 20355 states and 28336 transitions. [2021-11-25 18:14:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-25 18:14:09,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:09,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 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] [2021-11-25 18:14:09,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:14:09,862 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:09,863 INFO L85 PathProgramCache]: Analyzing trace with hash 747889871, now seen corresponding path program 1 times [2021-11-25 18:14:09,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:09,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190142448] [2021-11-25 18:14:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:09,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-25 18:14:10,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190142448] [2021-11-25 18:14:10,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190142448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:14:10,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996239838] [2021-11-25 18:14:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:10,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:14:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:14:10,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:14:10,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07308d1b-ad89-4676-b844-40a15fa8d205/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:14:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 3788 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:14:11,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:14:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-25 18:14:11,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:14:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-11-25 18:14:12,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996239838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:14:12,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733452009] [2021-11-25 18:14:12,610 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2021-11-25 18:14:12,610 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:14:12,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:14:12,629 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:14:12,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:14:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:14:19,400 INFO L244 Elim1Store]: Index analysis took 2136 ms