./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V --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 037e795cce503850d2c4452c45fcb076e5748c33e58ba9a275ca2db56216e774 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:35:34,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:35:34,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:35:34,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:35:34,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:35:34,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:35:34,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:35:34,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:35:34,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:35:34,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:35:34,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:35:34,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:35:34,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:35:34,879 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:35:34,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:35:34,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:35:34,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:35:34,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:35:34,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:35:34,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:35:34,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:35:34,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:35:34,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:35:34,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:35:34,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:35:34,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:35:34,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:35:34,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:35:34,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:35:34,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:35:34,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:35:34,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:35:34,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:35:34,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:35:34,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:35:34,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:35:34,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:35:34,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:35:34,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:35:34,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:35:34,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:35:34,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:35:34,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:35:34,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:35:34,966 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:35:34,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:35:34,967 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:35:34,967 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:35:34,967 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:35:34,968 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:35:34,968 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:35:34,968 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:35:34,968 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:35:34,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:35:34,969 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:35:34,969 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:35:34,969 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:35:34,969 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:35:34,969 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:35:34,969 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:35:34,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:35:34,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:35:34,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:35:34,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:35:34,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:35:34,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:35:34,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:35:34,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:35:34,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:35:34,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:35:34,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:35:34,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:35:34,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:35:34,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:35:34,980 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:35:34,980 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:35:34,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:35:34,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:35:34,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:35:34,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:35:34,982 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_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 037e795cce503850d2c4452c45fcb076e5748c33e58ba9a275ca2db56216e774 [2021-11-23 03:35:35,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:35:35,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:35:35,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:35:35,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:35:35,314 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:35:35,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i [2021-11-23 03:35:35,385 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/data/1505aecc2/e60f7e687afe46f49ed7a370e362fcc5/FLAG7715ed426 [2021-11-23 03:35:36,329 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:35:36,330 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i [2021-11-23 03:35:36,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/data/1505aecc2/e60f7e687afe46f49ed7a370e362fcc5/FLAG7715ed426 [2021-11-23 03:35:36,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/data/1505aecc2/e60f7e687afe46f49ed7a370e362fcc5 [2021-11-23 03:35:36,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:35:36,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:35:36,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:35:36,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:35:36,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:35:36,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:35:36" (1/1) ... [2021-11-23 03:35:36,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50219f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:36, skipping insertion in model container [2021-11-23 03:35:36,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:35:36" (1/1) ... [2021-11-23 03:35:36,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:35:36,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:35:39,706 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_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i[261739,261752] [2021-11-23 03:35:39,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:35:40,080 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:35:40,639 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_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i[261739,261752] [2021-11-23 03:35:40,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:35:40,883 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:35:40,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40 WrapperNode [2021-11-23 03:35:40,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:35:40,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:35:40,886 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:35:40,886 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:35:40,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,432 INFO L137 Inliner]: procedures = 308, calls = 2780, calls flagged for inlining = 113, calls inlined = 103, statements flattened = 6360 [2021-11-23 03:35:41,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:35:41,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:35:41,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:35:41,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:35:41,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:41,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:42,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:35:42,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:35:42,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:35:42,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:35:42,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (1/1) ... [2021-11-23 03:35:42,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:35:42,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:35:42,089 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:35:42,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:35:42,144 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_origin [2021-11-23 03:35:42,144 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_origin [2021-11-23 03:35:42,144 INFO L130 BoogieDeclarations]: Found specification of procedure con_copy_unimap [2021-11-23 03:35:42,144 INFO L138 BoogieDeclarations]: Found implementation of procedure con_copy_unimap [2021-11-23 03:35:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_exit [2021-11-23 03:35:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_exit [2021-11-23 03:35:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure con_is_bound [2021-11-23 03:35:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure con_is_bound [2021-11-23 03:35:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_bmove [2021-11-23 03:35:42,146 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_bmove [2021-11-23 03:35:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure var_to_display [2021-11-23 03:35:42,146 INFO L138 BoogieDeclarations]: Found implementation of procedure var_to_display [2021-11-23 03:35:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure do_fbcon_takeover [2021-11-23 03:35:42,146 INFO L138 BoogieDeclarations]: Found implementation of procedure do_fbcon_takeover [2021-11-23 03:35:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:35:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:35:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:35:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:35:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:35:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:35:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:35:42,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:35:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure con2fb_release_oldinfo [2021-11-23 03:35:42,148 INFO L138 BoogieDeclarations]: Found implementation of procedure con2fb_release_oldinfo [2021-11-23 03:35:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure scr_memcpyw [2021-11-23 03:35:42,149 INFO L138 BoogieDeclarations]: Found implementation of procedure scr_memcpyw [2021-11-23 03:35:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_cursor [2021-11-23 03:35:42,149 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_cursor [2021-11-23 03:35:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure get_default_font [2021-11-23 03:35:42,149 INFO L138 BoogieDeclarations]: Found implementation of procedure get_default_font [2021-11-23 03:35:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-23 03:35:42,150 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-23 03:35:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_putcs [2021-11-23 03:35:42,150 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_putcs [2021-11-23 03:35:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure get_color [2021-11-23 03:35:42,150 INFO L138 BoogieDeclarations]: Found implementation of procedure get_color [2021-11-23 03:35:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure scr_memsetw [2021-11-23 03:35:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure scr_memsetw [2021-11-23 03:35:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:35:42,151 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:35:42,151 INFO L130 BoogieDeclarations]: Found specification of procedure do_unregister_con_driver [2021-11-23 03:35:42,152 INFO L138 BoogieDeclarations]: Found implementation of procedure do_unregister_con_driver [2021-11-23 03:35:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:35:42,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:35:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_get_font [2021-11-23 03:35:42,152 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_get_font [2021-11-23 03:35:42,152 INFO L130 BoogieDeclarations]: Found specification of procedure real_y [2021-11-23 03:35:42,153 INFO L138 BoogieDeclarations]: Found implementation of procedure real_y [2021-11-23 03:35:42,153 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_update_softback [2021-11-23 03:35:42,154 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_update_softback [2021-11-23 03:35:42,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:35:42,156 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:35:42,156 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:35:42,156 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:35:42,156 INFO L130 BoogieDeclarations]: Found specification of procedure update_region [2021-11-23 03:35:42,156 INFO L138 BoogieDeclarations]: Found implementation of procedure update_region [2021-11-23 03:35:42,157 INFO L130 BoogieDeclarations]: Found specification of procedure fb_flashcursor [2021-11-23 03:35:42,157 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_flashcursor [2021-11-23 03:35:42,157 INFO L130 BoogieDeclarations]: Found specification of procedure find_font [2021-11-23 03:35:42,158 INFO L138 BoogieDeclarations]: Found implementation of procedure find_font [2021-11-23 03:35:42,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:35:42,159 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_scrolldelta [2021-11-23 03:35:42,159 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_scrolldelta [2021-11-23 03:35:42,159 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 03:35:42,159 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_disp [2021-11-23 03:35:42,159 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_disp [2021-11-23 03:35:42,160 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2021-11-23 03:35:42,160 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2021-11-23 03:35:42,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:35:42,160 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_clear_margins [2021-11-23 03:35:42,160 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_clear_margins [2021-11-23 03:35:42,161 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:35:42,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:35:42,162 INFO L130 BoogieDeclarations]: Found specification of procedure display_to_var [2021-11-23 03:35:42,162 INFO L138 BoogieDeclarations]: Found implementation of procedure display_to_var [2021-11-23 03:35:42,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:35:42,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:35:42,163 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~X~int~X~int~TO~VOID [2021-11-23 03:35:42,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~X~int~X~int~TO~VOID [2021-11-23 03:35:42,163 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2021-11-23 03:35:42,163 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2021-11-23 03:35:42,164 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:35:42,164 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:35:42,165 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-23 03:35:42,165 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-23 03:35:42,165 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:35:42,165 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:35:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_debug_enter [2021-11-23 03:35:42,166 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_debug_enter [2021-11-23 03:35:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_del_cursor_timer [2021-11-23 03:35:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_del_cursor_timer [2021-11-23 03:35:42,167 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw_move [2021-11-23 03:35:42,167 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw_move [2021-11-23 03:35:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:35:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 03:35:42,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 03:35:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:35:42,168 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_is_inactive [2021-11-23 03:35:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_is_inactive [2021-11-23 03:35:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_clear [2021-11-23 03:35:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_clear [2021-11-23 03:35:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_add_cursor_timer [2021-11-23 03:35:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_add_cursor_timer [2021-11-23 03:35:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:35:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure fb_set_var [2021-11-23 03:35:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_set_var [2021-11-23 03:35:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:35:42,171 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:35:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure set_blitting_type [2021-11-23 03:35:42,171 INFO L138 BoogieDeclarations]: Found implementation of procedure set_blitting_type [2021-11-23 03:35:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_bmove_rec [2021-11-23 03:35:42,173 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_bmove_rec [2021-11-23 03:35:42,176 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:35:42,177 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:35:42,177 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_palette [2021-11-23 03:35:42,177 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_palette [2021-11-23 03:35:42,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:35:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure set_con2fb_map [2021-11-23 03:35:42,180 INFO L138 BoogieDeclarations]: Found implementation of procedure set_con2fb_map [2021-11-23 03:35:42,180 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_debug_leave [2021-11-23 03:35:42,181 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_debug_leave [2021-11-23 03:35:42,186 INFO L130 BoogieDeclarations]: Found specification of procedure console_conditional_schedule [2021-11-23 03:35:42,187 INFO L138 BoogieDeclarations]: Found implementation of procedure console_conditional_schedule [2021-11-23 03:35:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_copy_font [2021-11-23 03:35:42,187 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_copy_font [2021-11-23 03:35:42,187 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_do_set_font [2021-11-23 03:35:42,187 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_do_set_font [2021-11-23 03:35:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:35:42,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:35:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:35:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure con2fb_acquire_newinfo [2021-11-23 03:35:42,188 INFO L138 BoogieDeclarations]: Found implementation of procedure con2fb_acquire_newinfo [2021-11-23 03:35:42,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:35:42,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:35:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure fb_get_color_depth [2021-11-23 03:35:42,189 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_get_color_depth [2021-11-23 03:35:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:35:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_prepare_logo [2021-11-23 03:35:42,189 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_prepare_logo [2021-11-23 03:35:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:35:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw_blit [2021-11-23 03:35:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw_blit [2021-11-23 03:35:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2021-11-23 03:35:42,190 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2021-11-23 03:35:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure fb_videomode_to_var [2021-11-23 03:35:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_videomode_to_var [2021-11-23 03:35:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~TO~VOID [2021-11-23 03:35:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~X~int~X~int~X~int~TO~VOID [2021-11-23 03:35:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:35:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:35:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure console_lock [2021-11-23 03:35:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure console_lock [2021-11-23 03:35:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_modechanged [2021-11-23 03:35:42,192 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_modechanged [2021-11-23 03:35:42,192 INFO L130 BoogieDeclarations]: Found specification of procedure console_unlock [2021-11-23 03:35:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure console_unlock [2021-11-23 03:35:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_invert_region [2021-11-23 03:35:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_invert_region [2021-11-23 03:35:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_fb_info [2021-11-23 03:35:42,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_fb_info [2021-11-23 03:35:42,193 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_set_all_vcs [2021-11-23 03:35:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_set_all_vcs [2021-11-23 03:35:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_redraw [2021-11-23 03:35:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_redraw [2021-11-23 03:35:42,194 INFO L130 BoogieDeclarations]: Found specification of procedure updatescrollmode [2021-11-23 03:35:42,194 INFO L138 BoogieDeclarations]: Found implementation of procedure updatescrollmode [2021-11-23 03:35:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure fbcon_switch [2021-11-23 03:35:42,195 INFO L138 BoogieDeclarations]: Found implementation of procedure fbcon_switch [2021-11-23 03:35:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure vc_resize [2021-11-23 03:35:42,195 INFO L138 BoogieDeclarations]: Found implementation of procedure vc_resize [2021-11-23 03:35:42,195 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:35:42,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 03:35:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure redraw_screen [2021-11-23 03:35:42,196 INFO L138 BoogieDeclarations]: Found implementation of procedure redraw_screen [2021-11-23 03:35:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:35:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure search_fb_in_map [2021-11-23 03:35:42,196 INFO L138 BoogieDeclarations]: Found implementation of procedure search_fb_in_map [2021-11-23 03:35:42,196 INFO L130 BoogieDeclarations]: Found specification of procedure con_set_default_unimap [2021-11-23 03:35:42,197 INFO L138 BoogieDeclarations]: Found implementation of procedure con_set_default_unimap [2021-11-23 03:35:42,197 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-23 03:35:42,197 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-23 03:35:42,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:35:42,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:35:42,198 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:35:42,198 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:35:43,519 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:35:43,524 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:35:46,473 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:36:17,273 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:36:19,628 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:36:19,628 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:36:19,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:19 BoogieIcfgContainer [2021-11-23 03:36:19,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:36:19,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:36:19,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:36:19,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:36:19,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:35:36" (1/3) ... [2021-11-23 03:36:19,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36768e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:19, skipping insertion in model container [2021-11-23 03:36:19,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:40" (2/3) ... [2021-11-23 03:36:19,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36768e2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:19, skipping insertion in model container [2021-11-23 03:36:19,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:19" (3/3) ... [2021-11-23 03:36:19,641 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--video--console--fbcon.ko-entry_point.cil.out.i [2021-11-23 03:36:19,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:36:19,647 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:36:19,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:36:19,706 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 [2021-11-23 03:36:19,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:36:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 1472 states, 986 states have (on average 1.4219066937119675) internal successors, (1402), 1041 states have internal predecessors, (1402), 401 states have call successors, (401), 84 states have call predecessors, (401), 83 states have return successors, (396), 384 states have call predecessors, (396), 396 states have call successors, (396) [2021-11-23 03:36:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-11-23 03:36:19,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:19,795 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:19,795 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1121412808, now seen corresponding path program 1 times [2021-11-23 03:36:19,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:19,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970600483] [2021-11-23 03:36:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:19,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2021-11-23 03:36:20,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:20,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970600483] [2021-11-23 03:36:20,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970600483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:20,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:20,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:36:20,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22392746] [2021-11-23 03:36:20,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:20,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:36:20,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:36:21,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:21,036 INFO L87 Difference]: Start difference. First operand has 1472 states, 986 states have (on average 1.4219066937119675) internal successors, (1402), 1041 states have internal predecessors, (1402), 401 states have call successors, (401), 84 states have call predecessors, (401), 83 states have return successors, (396), 384 states have call predecessors, (396), 396 states have call successors, (396) Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 03:36:22,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:23,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:25,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:36:27,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:36:30,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:34,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:36,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:37,879 INFO L93 Difference]: Finished difference Result 4121 states and 6156 transitions. [2021-11-23 03:36:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:36:37,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 433 [2021-11-23 03:36:37,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:37,942 INFO L225 Difference]: With dead ends: 4121 [2021-11-23 03:36:37,942 INFO L226 Difference]: Without dead ends: 2724 [2021-11-23 03:36:37,960 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 [2021-11-23 03:36:37,963 INFO L933 BasicCegarLoop]: 2299 mSDtfsCounter, 1910 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 4209 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:37,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1914 Valid, 4209 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 482 Invalid, 3 Unknown, 0 Unchecked, 16.6s Time] [2021-11-23 03:36:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-11-23 03:36:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2719. [2021-11-23 03:36:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 1853 states have (on average 1.42471667566109) internal successors, (2640), 1939 states have internal predecessors, (2640), 706 states have call successors, (706), 162 states have call predecessors, (706), 159 states have return successors, (700), 675 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-23 03:36:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4046 transitions. [2021-11-23 03:36:38,202 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4046 transitions. Word has length 433 [2021-11-23 03:36:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:38,204 INFO L470 AbstractCegarLoop]: Abstraction has 2719 states and 4046 transitions. [2021-11-23 03:36:38,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 03:36:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4046 transitions. [2021-11-23 03:36:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-11-23 03:36:38,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:38,220 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:38,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:36:38,221 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:38,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1668106708, now seen corresponding path program 1 times [2021-11-23 03:36:38,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:38,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470845826] [2021-11-23 03:36:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:38,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2021-11-23 03:36:38,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:38,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470845826] [2021-11-23 03:36:38,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470845826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:36:38,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:36:38,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:36:38,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210822030] [2021-11-23 03:36:38,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:36:38,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:36:38,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:36:38,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:36:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:36:38,641 INFO L87 Difference]: Start difference. First operand 2719 states and 4046 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 03:36:41,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:43,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:36:45,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:36:47,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:50,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:53,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:36:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:36:55,921 INFO L93 Difference]: Finished difference Result 5350 states and 7963 transitions. [2021-11-23 03:36:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:36:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 438 [2021-11-23 03:36:55,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:36:55,955 INFO L225 Difference]: With dead ends: 5350 [2021-11-23 03:36:55,956 INFO L226 Difference]: Without dead ends: 2720 [2021-11-23 03:36:55,975 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 [2021-11-23 03:36:55,979 INFO L933 BasicCegarLoop]: 1942 mSDtfsCounter, 0 mSDsluCounter, 2172 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:36:55,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3881 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 468 Invalid, 5 Unknown, 0 Unchecked, 17.1s Time] [2021-11-23 03:36:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-11-23 03:36:56,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2720. [2021-11-23 03:36:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 1854 states have (on average 1.424487594390507) internal successors, (2641), 1940 states have internal predecessors, (2641), 706 states have call successors, (706), 162 states have call predecessors, (706), 159 states have return successors, (700), 675 states have call predecessors, (700), 700 states have call successors, (700) [2021-11-23 03:36:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4047 transitions. [2021-11-23 03:36:56,140 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4047 transitions. Word has length 438 [2021-11-23 03:36:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:36:56,143 INFO L470 AbstractCegarLoop]: Abstraction has 2720 states and 4047 transitions. [2021-11-23 03:36:56,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 03:36:56,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4047 transitions. [2021-11-23 03:36:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-23 03:36:56,162 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:36:56,163 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:36:56,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:36:56,163 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:36:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:36:56,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1055585361, now seen corresponding path program 1 times [2021-11-23 03:36:56,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:36:56,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488042651] [2021-11-23 03:36:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:56,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:36:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2021-11-23 03:36:56,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:36:56,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488042651] [2021-11-23 03:36:56,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488042651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:36:56,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776682457] [2021-11-23 03:36:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:36:56,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:36:56,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:36:56,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:36:56,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:36:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:36:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 3493 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:36:58,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-23 03:37:00,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:37:00,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776682457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:00,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:00,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:37:00,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623719789] [2021-11-23 03:37:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:00,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:37:00,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:00,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:37:00,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:00,410 INFO L87 Difference]: Start difference. First operand 2720 states and 4047 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:37:02,440 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:04,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:07,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:09,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:13,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:15,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:17,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:18,266 INFO L93 Difference]: Finished difference Result 5293 states and 7870 transitions. [2021-11-23 03:37:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:37:18,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 439 [2021-11-23 03:37:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:18,324 INFO L225 Difference]: With dead ends: 5293 [2021-11-23 03:37:18,324 INFO L226 Difference]: Without dead ends: 5290 [2021-11-23 03:37:18,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:18,331 INFO L933 BasicCegarLoop]: 2320 mSDtfsCounter, 1911 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 4122 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:18,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1915 Valid, 4122 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 5 Unknown, 0 Unchecked, 17.7s Time] [2021-11-23 03:37:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5290 states. [2021-11-23 03:37:18,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5290 to 5285. [2021-11-23 03:37:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 3627 states have (on average 1.4295561069754619) internal successors, (5185), 3791 states have internal predecessors, (5185), 1342 states have call successors, (1342), 322 states have call predecessors, (1342), 315 states have return successors, (1336), 1285 states have call predecessors, (1336), 1336 states have call successors, (1336) [2021-11-23 03:37:18,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 7863 transitions. [2021-11-23 03:37:18,670 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 7863 transitions. Word has length 439 [2021-11-23 03:37:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:18,675 INFO L470 AbstractCegarLoop]: Abstraction has 5285 states and 7863 transitions. [2021-11-23 03:37:18,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:37:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 7863 transitions. [2021-11-23 03:37:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-11-23 03:37:18,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:18,698 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:18,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:18,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:18,923 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1636059588, now seen corresponding path program 1 times [2021-11-23 03:37:18,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:18,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072485364] [2021-11-23 03:37:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:18,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2021-11-23 03:37:19,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:19,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072485364] [2021-11-23 03:37:19,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072485364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:19,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790535977] [2021-11-23 03:37:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:19,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:19,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:19,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:37:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:20,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 3495 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:37:20,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-23 03:37:22,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:37:22,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790535977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:22,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:22,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:37:22,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401979518] [2021-11-23 03:37:22,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:22,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:37:22,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:22,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:37:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:22,685 INFO L87 Difference]: Start difference. First operand 5285 states and 7863 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:37:24,714 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 [] [2021-11-23 03:37:26,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:28,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:31,370 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:33,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:37,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:39,195 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:40,207 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 [] [2021-11-23 03:37:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:40,532 INFO L93 Difference]: Finished difference Result 7858 states and 11689 transitions. [2021-11-23 03:37:40,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:37:40,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 440 [2021-11-23 03:37:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:40,604 INFO L225 Difference]: With dead ends: 7858 [2021-11-23 03:37:40,604 INFO L226 Difference]: Without dead ends: 7855 [2021-11-23 03:37:40,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:40,612 INFO L933 BasicCegarLoop]: 2343 mSDtfsCounter, 1908 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1913 SdHoareTripleChecker+Valid, 4148 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:40,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1913 Valid, 4148 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 473 Invalid, 6 Unknown, 0 Unchecked, 17.6s Time] [2021-11-23 03:37:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-11-23 03:37:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7847. [2021-11-23 03:37:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7847 states, 5399 states have (on average 1.4315614002593073) internal successors, (7729), 5641 states have internal predecessors, (7729), 1978 states have call successors, (1978), 480 states have call predecessors, (1978), 469 states have return successors, (1972), 1895 states have call predecessors, (1972), 1972 states have call successors, (1972) [2021-11-23 03:37:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7847 states to 7847 states and 11679 transitions. [2021-11-23 03:37:41,184 INFO L78 Accepts]: Start accepts. Automaton has 7847 states and 11679 transitions. Word has length 440 [2021-11-23 03:37:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:41,186 INFO L470 AbstractCegarLoop]: Abstraction has 7847 states and 11679 transitions. [2021-11-23 03:37:41,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:37:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 7847 states and 11679 transitions. [2021-11-23 03:37:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2021-11-23 03:37:41,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:41,211 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:41,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:41,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:41,430 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:41,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:41,431 INFO L85 PathProgramCache]: Analyzing trace with hash -822288046, now seen corresponding path program 1 times [2021-11-23 03:37:41,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:41,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606166672] [2021-11-23 03:37:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:41,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2021-11-23 03:37:41,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606166672] [2021-11-23 03:37:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606166672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114445060] [2021-11-23 03:37:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:41,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:41,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:41,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:37:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 3497 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:37:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-23 03:37:44,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:37:44,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114445060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:44,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:44,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:37:44,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308984099] [2021-11-23 03:37:44,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:44,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:37:44,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:37:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:44,620 INFO L87 Difference]: Start difference. First operand 7847 states and 11679 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:37:46,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:48,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:50,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:53,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:55,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:59,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:01,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:02,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:02,392 INFO L93 Difference]: Finished difference Result 18141 states and 27024 transitions. [2021-11-23 03:38:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:02,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 441 [2021-11-23 03:38:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:02,505 INFO L225 Difference]: With dead ends: 18141 [2021-11-23 03:38:02,506 INFO L226 Difference]: Without dead ends: 10383 [2021-11-23 03:38:02,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:38:02,556 INFO L933 BasicCegarLoop]: 2344 mSDtfsCounter, 1905 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 4147 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:02,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 4147 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 473 Invalid, 6 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 03:38:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10383 states. [2021-11-23 03:38:03,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10383 to 10359. [2021-11-23 03:38:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10359 states, 7144 states have (on average 1.4335106382978724) internal successors, (10241), 7464 states have internal predecessors, (10241), 2603 states have call successors, (2603), 627 states have call predecessors, (2603), 611 states have return successors, (2596), 2493 states have call predecessors, (2596), 2596 states have call successors, (2596) [2021-11-23 03:38:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10359 states to 10359 states and 15440 transitions. [2021-11-23 03:38:03,115 INFO L78 Accepts]: Start accepts. Automaton has 10359 states and 15440 transitions. Word has length 441 [2021-11-23 03:38:03,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:03,117 INFO L470 AbstractCegarLoop]: Abstraction has 10359 states and 15440 transitions. [2021-11-23 03:38:03,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:38:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 10359 states and 15440 transitions. [2021-11-23 03:38:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-11-23 03:38:03,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:03,132 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:03,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:03,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:03,355 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 278351495, now seen corresponding path program 1 times [2021-11-23 03:38:03,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:03,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393080262] [2021-11-23 03:38:03,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:03,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2021-11-23 03:38:03,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:03,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393080262] [2021-11-23 03:38:03,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393080262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:03,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888808731] [2021-11-23 03:38:03,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:03,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:03,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:38:03,802 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:38:03,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:38:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 3499 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:38:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-23 03:38:06,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:38:06,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888808731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:06,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:06,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:38:06,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006759712] [2021-11-23 03:38:06,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:06,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:06,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:38:06,481 INFO L87 Difference]: Start difference. First operand 10359 states and 15440 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:38:08,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:38:11,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:38:13,546 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:17,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:19,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:20,117 INFO L93 Difference]: Finished difference Result 10375 states and 15455 transitions. [2021-11-23 03:38:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:20,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 442 [2021-11-23 03:38:20,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:20,172 INFO L225 Difference]: With dead ends: 10375 [2021-11-23 03:38:20,173 INFO L226 Difference]: Without dead ends: 10372 [2021-11-23 03:38:20,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:38:20,181 INFO L933 BasicCegarLoop]: 2342 mSDtfsCounter, 1895 mSDsluCounter, 2040 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 4153 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:20,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 4153 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 475 Invalid, 4 Unknown, 0 Unchecked, 13.4s Time] [2021-11-23 03:38:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10372 states. [2021-11-23 03:38:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10372 to 10361. [2021-11-23 03:38:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10361 states, 7146 states have (on average 1.4333893087041703) internal successors, (10243), 7466 states have internal predecessors, (10243), 2603 states have call successors, (2603), 627 states have call predecessors, (2603), 611 states have return successors, (2596), 2493 states have call predecessors, (2596), 2596 states have call successors, (2596) [2021-11-23 03:38:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10361 states to 10361 states and 15442 transitions. [2021-11-23 03:38:20,618 INFO L78 Accepts]: Start accepts. Automaton has 10361 states and 15442 transitions. Word has length 442 [2021-11-23 03:38:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:20,619 INFO L470 AbstractCegarLoop]: Abstraction has 10361 states and 15442 transitions. [2021-11-23 03:38:20,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:38:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10361 states and 15442 transitions. [2021-11-23 03:38:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-11-23 03:38:20,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:20,635 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:20,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:20,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:38:20,850 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:20,851 INFO L85 PathProgramCache]: Analyzing trace with hash 38443765, now seen corresponding path program 1 times [2021-11-23 03:38:20,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741802268] [2021-11-23 03:38:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:20,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4207 trivial. 0 not checked. [2021-11-23 03:38:21,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:21,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741802268] [2021-11-23 03:38:21,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741802268] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:38:21,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822491622] [2021-11-23 03:38:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:21,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:21,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:38:21,136 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:38:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:38:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 3501 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:38:22,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-23 03:38:23,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:38:23,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822491622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:23,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:38:23,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:38:23,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702615198] [2021-11-23 03:38:23,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:23,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:23,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:23,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:23,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:38:23,842 INFO L87 Difference]: Start difference. First operand 10361 states and 15442 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:38:26,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:38:28,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:38:30,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:33,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:37,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:39,447 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 [] [2021-11-23 03:38:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:39,699 INFO L93 Difference]: Finished difference Result 10516 states and 15631 transitions. [2021-11-23 03:38:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) Word has length 443 [2021-11-23 03:38:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:39,761 INFO L225 Difference]: With dead ends: 10516 [2021-11-23 03:38:39,762 INFO L226 Difference]: Without dead ends: 10491 [2021-11-23 03:38:39,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:38:39,775 INFO L933 BasicCegarLoop]: 2359 mSDtfsCounter, 1888 mSDsluCounter, 2042 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1896 SdHoareTripleChecker+Valid, 4173 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:39,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1896 Valid, 4173 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 5 Unknown, 0 Unchecked, 15.7s Time] [2021-11-23 03:38:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2021-11-23 03:38:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 10472. [2021-11-23 03:38:40,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 7208 states have (on average 1.4327136514983352) internal successors, (10327), 7540 states have internal predecessors, (10327), 2626 states have call successors, (2626), 653 states have call predecessors, (2626), 637 states have return successors, (2619), 2508 states have call predecessors, (2619), 2619 states have call successors, (2619) [2021-11-23 03:38:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 15572 transitions. [2021-11-23 03:38:40,278 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 15572 transitions. Word has length 443 [2021-11-23 03:38:40,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:40,279 INFO L470 AbstractCegarLoop]: Abstraction has 10472 states and 15572 transitions. [2021-11-23 03:38:40,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (50), 2 states have call predecessors, (50), 1 states have return successors, (49), 1 states have call predecessors, (49), 1 states have call successors, (49) [2021-11-23 03:38:40,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 15572 transitions. [2021-11-23 03:38:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2021-11-23 03:38:40,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:40,295 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:40,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:38:40,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:40,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1260020647, now seen corresponding path program 1 times [2021-11-23 03:38:40,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:40,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756106687] [2021-11-23 03:38:40,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:40,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:40,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:38:40,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632400830] [2021-11-23 03:38:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:40,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:38:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:38:40,654 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:38:40,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:38:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:41,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 3818 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:38:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:38:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4209 trivial. 0 not checked. [2021-11-23 03:38:42,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:38:42,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:42,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756106687] [2021-11-23 03:38:42,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:38:42,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632400830] [2021-11-23 03:38:42,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632400830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:42,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:38:42,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:38:42,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123945026] [2021-11-23 03:38:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:42,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:42,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:42,674 INFO L87 Difference]: Start difference. First operand 10472 states and 15572 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-23 03:38:45,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:38:47,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:38:49,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:51,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:54,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:57,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:59,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:01,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:03,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:03,152 INFO L93 Difference]: Finished difference Result 16732 states and 24688 transitions. [2021-11-23 03:39:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:03,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 446 [2021-11-23 03:39:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:03,243 INFO L225 Difference]: With dead ends: 16732 [2021-11-23 03:39:03,243 INFO L226 Difference]: Without dead ends: 15679 [2021-11-23 03:39:03,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:03,260 INFO L933 BasicCegarLoop]: 2256 mSDtfsCounter, 2049 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 3 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2057 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:03,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2057 Valid, 4027 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 463 Invalid, 7 Unknown, 0 Unchecked, 20.1s Time] [2021-11-23 03:39:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15679 states. [2021-11-23 03:39:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15679 to 15597. [2021-11-23 03:39:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15597 states, 10741 states have (on average 1.4338515966855971) internal successors, (15401), 11237 states have internal predecessors, (15401), 3896 states have call successors, (3896), 983 states have call predecessors, (3896), 959 states have return successors, (3901), 3718 states have call predecessors, (3901), 3889 states have call successors, (3901) [2021-11-23 03:39:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15597 states to 15597 states and 23198 transitions. [2021-11-23 03:39:04,007 INFO L78 Accepts]: Start accepts. Automaton has 15597 states and 23198 transitions. Word has length 446 [2021-11-23 03:39:04,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:04,008 INFO L470 AbstractCegarLoop]: Abstraction has 15597 states and 23198 transitions. [2021-11-23 03:39:04,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-23 03:39:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 15597 states and 23198 transitions. [2021-11-23 03:39:04,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2021-11-23 03:39:04,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:04,031 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:04,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:39:04,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:04,258 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:04,259 INFO L85 PathProgramCache]: Analyzing trace with hash -254081314, now seen corresponding path program 1 times [2021-11-23 03:39:04,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:04,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239686303] [2021-11-23 03:39:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:04,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:04,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:39:04,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210452012] [2021-11-23 03:39:04,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:04,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:04,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:04,377 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:04,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:39:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 3788 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:39:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4210 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-23 03:39:06,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:39:06,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:06,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239686303] [2021-11-23 03:39:06,532 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:39:06,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210452012] [2021-11-23 03:39:06,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210452012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:06,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:06,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:39:06,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318560691] [2021-11-23 03:39:06,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:06,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:06,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:06,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:06,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:06,536 INFO L87 Difference]: Start difference. First operand 15597 states and 23198 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-23 03:39:09,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:12,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:14,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:16,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:18,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:21,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:25,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:25,910 INFO L93 Difference]: Finished difference Result 39690 states and 58728 transitions. [2021-11-23 03:39:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) Word has length 452 [2021-11-23 03:39:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:26,055 INFO L225 Difference]: With dead ends: 39690 [2021-11-23 03:39:26,055 INFO L226 Difference]: Without dead ends: 24190 [2021-11-23 03:39:26,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:26,157 INFO L933 BasicCegarLoop]: 2145 mSDtfsCounter, 1208 mSDsluCounter, 1975 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 25 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 3894 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:26,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 3894 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 557 Invalid, 6 Unknown, 0 Unchecked, 18.7s Time] [2021-11-23 03:39:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24190 states. [2021-11-23 03:39:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24190 to 24166. [2021-11-23 03:39:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24166 states, 16759 states have (on average 1.4320066829763112) internal successors, (23999), 17506 states have internal predecessors, (23999), 5684 states have call successors, (5684), 1770 states have call predecessors, (5684), 1722 states have return successors, (5693), 5415 states have call predecessors, (5693), 5677 states have call successors, (5693) [2021-11-23 03:39:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24166 states to 24166 states and 35376 transitions. [2021-11-23 03:39:27,532 INFO L78 Accepts]: Start accepts. Automaton has 24166 states and 35376 transitions. Word has length 452 [2021-11-23 03:39:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:27,533 INFO L470 AbstractCegarLoop]: Abstraction has 24166 states and 35376 transitions. [2021-11-23 03:39:27,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 2 states have call predecessors, (50), 2 states have call successors, (50) [2021-11-23 03:39:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 24166 states and 35376 transitions. [2021-11-23 03:39:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2021-11-23 03:39:27,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:27,543 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:27,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:39:27,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:39:27,771 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1202162179, now seen corresponding path program 1 times [2021-11-23 03:39:27,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:27,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029554892] [2021-11-23 03:39:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:27,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:27,890 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:39:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566451803] [2021-11-23 03:39:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:27,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:27,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:27,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:27,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:39:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:28,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 3529 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:39:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4210 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2021-11-23 03:39:29,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:39:29,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029554892] [2021-11-23 03:39:29,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:39:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566451803] [2021-11-23 03:39:29,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566451803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:29,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:29,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:39:29,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055737501] [2021-11-23 03:39:29,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:29,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:29,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:29,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:29,631 INFO L87 Difference]: Start difference. First operand 24166 states and 35376 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 03:39:30,850 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 [] [2021-11-23 03:39:33,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:35,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:37,411 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:39,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:42,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:47,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:47,536 INFO L93 Difference]: Finished difference Result 47897 states and 70034 transitions. [2021-11-23 03:39:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:47,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 454 [2021-11-23 03:39:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:47,704 INFO L225 Difference]: With dead ends: 47897 [2021-11-23 03:39:47,704 INFO L226 Difference]: Without dead ends: 23828 [2021-11-23 03:39:47,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:47,797 INFO L933 BasicCegarLoop]: 2173 mSDtfsCounter, 1138 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 3922 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:47,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 3922 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 534 Invalid, 5 Unknown, 0 Unchecked, 17.2s Time] [2021-11-23 03:39:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23828 states. [2021-11-23 03:39:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23828 to 23730. [2021-11-23 03:39:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23730 states, 16263 states have (on average 1.4284572342126298) internal successors, (23231), 17026 states have internal predecessors, (23231), 5712 states have call successors, (5712), 1798 states have call predecessors, (5712), 1754 states have return successors, (5725), 5439 states have call predecessors, (5725), 5705 states have call successors, (5725) [2021-11-23 03:39:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23730 states to 23730 states and 34668 transitions. [2021-11-23 03:39:49,094 INFO L78 Accepts]: Start accepts. Automaton has 23730 states and 34668 transitions. Word has length 454 [2021-11-23 03:39:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:49,096 INFO L470 AbstractCegarLoop]: Abstraction has 23730 states and 34668 transitions. [2021-11-23 03:39:49,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2021-11-23 03:39:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 23730 states and 34668 transitions. [2021-11-23 03:39:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-11-23 03:39:49,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:49,138 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:49,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:39:49,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:39:49,363 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:49,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:49,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1855843335, now seen corresponding path program 1 times [2021-11-23 03:39:49,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:49,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376643796] [2021-11-23 03:39:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:49,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:49,858 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:39:49,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646839033] [2021-11-23 03:39:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:49,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:49,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:49,862 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:49,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:39:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:51,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 4084 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:39:51,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2021-11-23 03:39:53,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:39:53,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376643796] [2021-11-23 03:39:53,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:39:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646839033] [2021-11-23 03:39:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646839033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:53,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:53,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:39:53,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806246775] [2021-11-23 03:39:53,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:53,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:53,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:53,148 INFO L87 Difference]: Start difference. First operand 23730 states and 34668 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:39:54,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:56,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:59,965 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:02,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:05,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:06,742 INFO L93 Difference]: Finished difference Result 24324 states and 35222 transitions. [2021-11-23 03:40:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:06,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 502 [2021-11-23 03:40:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:06,851 INFO L225 Difference]: With dead ends: 24324 [2021-11-23 03:40:06,851 INFO L226 Difference]: Without dead ends: 24260 [2021-11-23 03:40:06,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:06,865 INFO L933 BasicCegarLoop]: 2043 mSDtfsCounter, 1871 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1878 SdHoareTripleChecker+Valid, 2411 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:06,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1878 Valid, 2411 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 303 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2021-11-23 03:40:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24260 states. [2021-11-23 03:40:07,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24260 to 24166. [2021-11-23 03:40:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24166 states, 16514 states have (on average 1.4241249848613298) internal successors, (23518), 17279 states have internal predecessors, (23518), 5739 states have call successors, (5739), 1958 states have call predecessors, (5739), 1912 states have return successors, (5753), 5465 states have call predecessors, (5753), 5733 states have call successors, (5753) [2021-11-23 03:40:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24166 states to 24166 states and 35010 transitions. [2021-11-23 03:40:08,104 INFO L78 Accepts]: Start accepts. Automaton has 24166 states and 35010 transitions. Word has length 502 [2021-11-23 03:40:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:08,105 INFO L470 AbstractCegarLoop]: Abstraction has 24166 states and 35010 transitions. [2021-11-23 03:40:08,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:40:08,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24166 states and 35010 transitions. [2021-11-23 03:40:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2021-11-23 03:40:08,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:08,148 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:08,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 03:40:08,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:08,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1696035948, now seen corresponding path program 1 times [2021-11-23 03:40:08,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:08,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199128070] [2021-11-23 03:40:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:08,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:08,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:08,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003893684] [2021-11-23 03:40:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:08,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:08,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:08,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:08,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:40:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:09,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 4086 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:40:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2021-11-23 03:40:11,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:11,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:11,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199128070] [2021-11-23 03:40:11,552 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:11,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003893684] [2021-11-23 03:40:11,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003893684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:11,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:11,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:11,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585404265] [2021-11-23 03:40:11,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:11,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:11,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:11,555 INFO L87 Difference]: Start difference. First operand 24166 states and 35010 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:40:13,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:15,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:19,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:21,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:23,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:25,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:26,794 INFO L93 Difference]: Finished difference Result 24176 states and 35016 transitions. [2021-11-23 03:40:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 503 [2021-11-23 03:40:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:26,907 INFO L225 Difference]: With dead ends: 24176 [2021-11-23 03:40:26,907 INFO L226 Difference]: Without dead ends: 24173 [2021-11-23 03:40:26,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:26,920 INFO L933 BasicCegarLoop]: 2041 mSDtfsCounter, 1898 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 2381 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:26,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1903 Valid, 2381 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 5 Unknown, 0 Unchecked, 14.7s Time] [2021-11-23 03:40:26,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24173 states. [2021-11-23 03:40:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24173 to 24167. [2021-11-23 03:40:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24167 states, 16515 states have (on average 1.4239782016348774) internal successors, (23517), 17279 states have internal predecessors, (23517), 5737 states have call successors, (5737), 1960 states have call predecessors, (5737), 1914 states have return successors, (5752), 5464 states have call predecessors, (5752), 5732 states have call successors, (5752) [2021-11-23 03:40:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24167 states to 24167 states and 35006 transitions. [2021-11-23 03:40:28,179 INFO L78 Accepts]: Start accepts. Automaton has 24167 states and 35006 transitions. Word has length 503 [2021-11-23 03:40:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:28,179 INFO L470 AbstractCegarLoop]: Abstraction has 24167 states and 35006 transitions. [2021-11-23 03:40:28,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:40:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 24167 states and 35006 transitions. [2021-11-23 03:40:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-11-23 03:40:28,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:28,230 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:28,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:28,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:28,443 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1036979114, now seen corresponding path program 1 times [2021-11-23 03:40:28,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:28,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321937131] [2021-11-23 03:40:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:28,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:28,630 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:28,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138294780] [2021-11-23 03:40:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:28,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:28,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:28,632 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:28,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:40:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:30,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 4088 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:40:30,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2021-11-23 03:40:32,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:32,291 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:32,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321937131] [2021-11-23 03:40:32,292 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:32,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138294780] [2021-11-23 03:40:32,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138294780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:32,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:32,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:32,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680384273] [2021-11-23 03:40:32,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:32,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:32,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:32,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:32,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:32,294 INFO L87 Difference]: Start difference. First operand 24167 states and 35006 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:40:35,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:37,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:39,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:41,657 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:43,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:46,144 INFO L93 Difference]: Finished difference Result 30419 states and 44050 transitions. [2021-11-23 03:40:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 504 [2021-11-23 03:40:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:46,230 INFO L225 Difference]: With dead ends: 30419 [2021-11-23 03:40:46,230 INFO L226 Difference]: Without dead ends: 18269 [2021-11-23 03:40:46,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:46,274 INFO L933 BasicCegarLoop]: 2034 mSDtfsCounter, 1888 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:46,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1893 Valid, 2374 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 293 Invalid, 4 Unknown, 0 Unchecked, 13.3s Time] [2021-11-23 03:40:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18269 states. [2021-11-23 03:40:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18269 to 18254. [2021-11-23 03:40:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18254 states, 12462 states have (on average 1.4230460600224684) internal successors, (17734), 13042 states have internal predecessors, (17734), 4336 states have call successors, (4336), 1490 states have call predecessors, (4336), 1455 states have return successors, (4347), 4127 states have call predecessors, (4347), 4332 states have call successors, (4347) [2021-11-23 03:40:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18254 states to 18254 states and 26417 transitions. [2021-11-23 03:40:47,261 INFO L78 Accepts]: Start accepts. Automaton has 18254 states and 26417 transitions. Word has length 504 [2021-11-23 03:40:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:47,263 INFO L470 AbstractCegarLoop]: Abstraction has 18254 states and 26417 transitions. [2021-11-23 03:40:47,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:40:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18254 states and 26417 transitions. [2021-11-23 03:40:47,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-11-23 03:40:47,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:47,308 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:47,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:47,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 03:40:47,535 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2081058607, now seen corresponding path program 1 times [2021-11-23 03:40:47,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:47,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209858469] [2021-11-23 03:40:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:47,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:47,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:47,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061298232] [2021-11-23 03:40:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:47,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:47,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:47,692 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:47,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:40:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:49,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 4090 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:40:49,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2021-11-23 03:40:51,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:51,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209858469] [2021-11-23 03:40:51,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:51,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061298232] [2021-11-23 03:40:51,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061298232] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:51,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:51,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:51,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166966835] [2021-11-23 03:40:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:51,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:51,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:51,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:51,135 INFO L87 Difference]: Start difference. First operand 18254 states and 26417 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:40:52,323 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:54,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:56,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:59,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:01,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:03,551 INFO L93 Difference]: Finished difference Result 18262 states and 26424 transitions. [2021-11-23 03:41:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:03,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 505 [2021-11-23 03:41:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:03,631 INFO L225 Difference]: With dead ends: 18262 [2021-11-23 03:41:03,631 INFO L226 Difference]: Without dead ends: 18259 [2021-11-23 03:41:03,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:03,642 INFO L933 BasicCegarLoop]: 2033 mSDtfsCounter, 1885 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:03,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1890 Valid, 2373 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 4 Unknown, 0 Unchecked, 11.9s Time] [2021-11-23 03:41:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18259 states. [2021-11-23 03:41:04,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18259 to 18253. [2021-11-23 03:41:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18253 states, 12462 states have (on average 1.4229658160808858) internal successors, (17733), 13041 states have internal predecessors, (17733), 4335 states have call successors, (4335), 1490 states have call predecessors, (4335), 1455 states have return successors, (4347), 4127 states have call predecessors, (4347), 4332 states have call successors, (4347) [2021-11-23 03:41:04,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18253 states to 18253 states and 26415 transitions. [2021-11-23 03:41:04,441 INFO L78 Accepts]: Start accepts. Automaton has 18253 states and 26415 transitions. Word has length 505 [2021-11-23 03:41:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:04,441 INFO L470 AbstractCegarLoop]: Abstraction has 18253 states and 26415 transitions. [2021-11-23 03:41:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:41:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 18253 states and 26415 transitions. [2021-11-23 03:41:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-23 03:41:04,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:04,464 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:41:04,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:41:04,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:41:04,667 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:04,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:04,668 INFO L85 PathProgramCache]: Analyzing trace with hash 87789389, now seen corresponding path program 1 times [2021-11-23 03:41:04,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:04,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348070997] [2021-11-23 03:41:04,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:04,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:04,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:41:04,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419329416] [2021-11-23 03:41:04,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:04,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:41:04,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:41:04,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:41:04,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:41:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:06,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 4092 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:41:06,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2021-11-23 03:41:08,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:41:08,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:08,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348070997] [2021-11-23 03:41:08,044 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:41:08,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419329416] [2021-11-23 03:41:08,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419329416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:08,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:08,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:41:08,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765735839] [2021-11-23 03:41:08,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:08,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:08,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:08,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:08,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:08,048 INFO L87 Difference]: Start difference. First operand 18253 states and 26415 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:41:09,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:11,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:15,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:17,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:20,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:22,487 INFO L93 Difference]: Finished difference Result 18261 states and 26422 transitions. [2021-11-23 03:41:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:22,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) Word has length 506 [2021-11-23 03:41:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:22,556 INFO L225 Difference]: With dead ends: 18261 [2021-11-23 03:41:22,556 INFO L226 Difference]: Without dead ends: 18193 [2021-11-23 03:41:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:22,565 INFO L933 BasicCegarLoop]: 2032 mSDtfsCounter, 1882 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1887 SdHoareTripleChecker+Valid, 2372 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:22,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1887 Valid, 2372 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 291 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2021-11-23 03:41:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18193 states. [2021-11-23 03:41:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18193 to 16861. [2021-11-23 03:41:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16861 states, 11522 states have (on average 1.4237111612567264) internal successors, (16404), 12055 states have internal predecessors, (16404), 4027 states have call successors, (4027), 1344 states have call predecessors, (4027), 1311 states have return successors, (4036), 3835 states have call predecessors, (4036), 4025 states have call successors, (4036) [2021-11-23 03:41:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 24467 transitions. [2021-11-23 03:41:23,463 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 24467 transitions. Word has length 506 [2021-11-23 03:41:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:23,464 INFO L470 AbstractCegarLoop]: Abstraction has 16861 states and 24467 transitions. [2021-11-23 03:41:23,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 1 states have call predecessors, (56), 1 states have call successors, (56) [2021-11-23 03:41:23,464 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 24467 transitions. [2021-11-23 03:41:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2021-11-23 03:41:23,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:23,499 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:41:23,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:41:23,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:41:23,711 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:23,711 INFO L85 PathProgramCache]: Analyzing trace with hash 929029384, now seen corresponding path program 1 times [2021-11-23 03:41:23,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:23,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775472928] [2021-11-23 03:41:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:23,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4379 trivial. 0 not checked. [2021-11-23 03:41:24,087 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:24,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775472928] [2021-11-23 03:41:24,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775472928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:41:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231621292] [2021-11-23 03:41:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:24,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:41:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:41:24,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:41:24,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2fbc70d-f857-4d82-8cab-41a11c8a0aef/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:41:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:25,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 4003 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:41:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 162 proven. 1 refuted. 0 times theorem prover too weak. 4219 trivial. 0 not checked. [2021-11-23 03:41:26,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:41:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4382 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4379 trivial. 0 not checked. [2021-11-23 03:41:27,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231621292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:41:27,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454867145] [2021-11-23 03:41:27,746 INFO L159 IcfgInterpreter]: Started Sifa with 185 locations of interest [2021-11-23 03:41:27,749 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:41:27,755 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:41:27,761 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:41:27,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:41:29,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:29,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 66 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 183 [2021-11-23 03:41:29,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-23 03:41:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:32,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:32,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:32,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:32,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:33,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:33,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:33,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:33,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:41:35,433 INFO L244 Elim1Store]: Index analysis took 3420 ms