./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.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_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/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_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/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_955d5a7d-db79-496a-99d9-ca7519f7f260/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 7001fc39e766418166b5245dd523731096962c63b3f1d8b8399a7fc1e7a88c5f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:30:36,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:30:36,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:30:36,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:30:36,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:30:36,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:30:36,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:30:36,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:30:36,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:30:36,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:30:36,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:30:36,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:30:36,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:30:36,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:30:36,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:30:36,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:30:36,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:30:36,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:30:36,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:30:36,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:30:36,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:30:36,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:30:36,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:30:36,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:30:36,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:30:36,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:30:36,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:30:36,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:30:36,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:30:36,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:30:36,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:30:36,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:30:36,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:30:36,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:30:36,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:30:36,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:30:36,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:30:36,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:30:36,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:30:36,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:30:36,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:30:36,718 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:30:36,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:30:36,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:30:36,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:30:36,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:30:36,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:30:36,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:30:36,768 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:30:36,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:30:36,769 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:30:36,769 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:30:36,769 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:30:36,769 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:30:36,770 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:30:36,770 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:30:36,770 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:30:36,771 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:30:36,771 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:30:36,771 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:30:36,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:30:36,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:30:36,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:30:36,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:30:36,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:30:36,774 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:30:36,774 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:30:36,774 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:30:36,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:30:36,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:30:36,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:30:36,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:36,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:30:36,776 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:30:36,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:30:36,777 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:30:36,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:30:36,777 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:30:36,777 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:30:36,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:30:36,778 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_955d5a7d-db79-496a-99d9-ca7519f7f260/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7001fc39e766418166b5245dd523731096962c63b3f1d8b8399a7fc1e7a88c5f [2021-11-23 03:30:37,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:30:37,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:30:37,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:30:37,174 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:30:37,175 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:30:37,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i [2021-11-23 03:30:37,261 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/data/bc657da9e/e375dedf64ce4ab6809a0d6857b1a260/FLAGdcf75d782 [2021-11-23 03:30:38,486 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:30:38,488 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i [2021-11-23 03:30:38,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/data/bc657da9e/e375dedf64ce4ab6809a0d6857b1a260/FLAGdcf75d782 [2021-11-23 03:30:38,690 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/data/bc657da9e/e375dedf64ce4ab6809a0d6857b1a260 [2021-11-23 03:30:38,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:30:38,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:30:38,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:38,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:30:38,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:30:38,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:38" (1/1) ... [2021-11-23 03:30:38,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df4f1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:38, skipping insertion in model container [2021-11-23 03:30:38,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:38" (1/1) ... [2021-11-23 03:30:38,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:30:38,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:30:39,589 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6037] [2021-11-23 03:30:39,589 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6038-6039] [2021-11-23 03:30:40,200 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_955d5a7d-db79-496a-99d9-ca7519f7f260/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i[185861,185874] [2021-11-23 03:30:41,668 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 03:30:41,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:41,738 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:30:41,912 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6037] [2021-11-23 03:30:41,913 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6038-6039] [2021-11-23 03:30:41,925 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_955d5a7d-db79-496a-99d9-ca7519f7f260/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i[185861,185874] [2021-11-23 03:30:42,335 WARN L610 FunctionHandler]: implicit declaration of function ldv_xmalloc [2021-11-23 03:30:42,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:42,417 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:30:42,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42 WrapperNode [2021-11-23 03:30:42,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:42,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:42,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:30:42,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:30:42,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:42,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:42,729 INFO L137 Inliner]: procedures = 259, calls = 2016, calls flagged for inlining = 128, calls inlined = 102, statements flattened = 4816 [2021-11-23 03:30:42,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:42,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:30:42,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:30:42,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:30:42,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:42,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:42,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:42,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:42,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:42,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:43,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:43,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:30:43,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:30:43,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:30:43,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:30:43,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (1/1) ... [2021-11-23 03:30:43,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:43,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:43,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:30:43,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:30:43,231 INFO L130 BoogieDeclarations]: Found specification of procedure he_remove_one [2021-11-23 03:30:43,231 INFO L138 BoogieDeclarations]: Found implementation of procedure he_remove_one [2021-11-23 03:30:43,231 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 03:30:43,232 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 03:30:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2021-11-23 03:30:43,232 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2021-11-23 03:30:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-23 03:30:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:30:43,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:30:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure he_close [2021-11-23 03:30:43,233 INFO L138 BoogieDeclarations]: Found implementation of procedure he_close [2021-11-23 03:30:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_alloc [2021-11-23 03:30:43,234 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_alloc [2021-11-23 03:30:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 03:30:43,234 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 03:30:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 03:30:43,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 03:30:43,235 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:30:43,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:30:43,235 INFO L130 BoogieDeclarations]: Found specification of procedure he_phy_get [2021-11-23 03:30:43,235 INFO L138 BoogieDeclarations]: Found implementation of procedure he_phy_get [2021-11-23 03:30:43,235 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2021-11-23 03:30:43,236 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2021-11-23 03:30:43,236 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2021-11-23 03:30:43,236 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2021-11-23 03:30:43,236 INFO L130 BoogieDeclarations]: Found specification of procedure __alloc_tpd [2021-11-23 03:30:43,236 INFO L138 BoogieDeclarations]: Found implementation of procedure __alloc_tpd [2021-11-23 03:30:43,237 INFO L130 BoogieDeclarations]: Found specification of procedure rate_to_atmf [2021-11-23 03:30:43,237 INFO L138 BoogieDeclarations]: Found implementation of procedure rate_to_atmf [2021-11-23 03:30:43,237 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:30:43,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:30:43,238 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 03:30:43,238 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 03:30:43,238 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-23 03:30:43,239 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-23 03:30:43,239 INFO L130 BoogieDeclarations]: Found specification of procedure he_phy_put [2021-11-23 03:30:43,239 INFO L138 BoogieDeclarations]: Found implementation of procedure he_phy_put [2021-11-23 03:30:43,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:30:43,239 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:30:43,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:30:43,240 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:30:43,241 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2021-11-23 03:30:43,241 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2021-11-23 03:30:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:30:43,242 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 03:30:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 03:30:43,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:30:43,243 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_create [2021-11-23 03:30:43,243 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_create [2021-11-23 03:30:43,243 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 03:30:43,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 03:30:43,244 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:30:43,244 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:30:43,245 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_destroy [2021-11-23 03:30:43,245 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_destroy [2021-11-23 03:30:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2021-11-23 03:30:43,246 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2021-11-23 03:30:43,246 INFO L130 BoogieDeclarations]: Found specification of procedure he_readl_internal [2021-11-23 03:30:43,246 INFO L138 BoogieDeclarations]: Found implementation of procedure he_readl_internal [2021-11-23 03:30:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:30:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:30:43,247 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 03:30:43,247 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 03:30:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_word [2021-11-23 03:30:43,248 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_word [2021-11-23 03:30:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2021-11-23 03:30:43,249 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2021-11-23 03:30:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:30:43,249 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:30:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure he_send [2021-11-23 03:30:43,250 INFO L138 BoogieDeclarations]: Found implementation of procedure he_send [2021-11-23 03:30:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2021-11-23 03:30:43,250 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2021-11-23 03:30:43,250 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 03:30:43,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 03:30:43,251 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 03:30:43,251 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 03:30:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2021-11-23 03:30:43,252 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2021-11-23 03:30:43,252 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 03:30:43,253 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 03:30:43,253 INFO L130 BoogieDeclarations]: Found specification of procedure he_writel_internal [2021-11-23 03:30:43,253 INFO L138 BoogieDeclarations]: Found implementation of procedure he_writel_internal [2021-11-23 03:30:43,254 INFO L130 BoogieDeclarations]: Found specification of procedure he_ioctl [2021-11-23 03:30:43,254 INFO L138 BoogieDeclarations]: Found implementation of procedure he_ioctl [2021-11-23 03:30:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:30:43,255 INFO L130 BoogieDeclarations]: Found specification of procedure he_open [2021-11-23 03:30:43,256 INFO L138 BoogieDeclarations]: Found implementation of procedure he_open [2021-11-23 03:30:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 03:30:43,256 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 03:30:43,256 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 03:30:43,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 03:30:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:30:43,257 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:30:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-23 03:30:43,257 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-23 03:30:43,257 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2021-11-23 03:30:43,257 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2021-11-23 03:30:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:30:43,258 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-11-23 03:30:43,258 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-11-23 03:30:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure he_stop [2021-11-23 03:30:43,259 INFO L138 BoogieDeclarations]: Found implementation of procedure he_stop [2021-11-23 03:30:43,259 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:30:43,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:30:43,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:30:43,263 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-23 03:30:43,263 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-23 03:30:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure __enqueue_tpd [2021-11-23 03:30:43,265 INFO L138 BoogieDeclarations]: Found implementation of procedure __enqueue_tpd [2021-11-23 03:30:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-23 03:30:43,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-23 03:30:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:30:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-23 03:30:43,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-23 03:30:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-23 03:30:43,273 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-23 03:30:43,273 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 03:30:43,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 03:30:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:30:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_dword [2021-11-23 03:30:43,274 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_dword [2021-11-23 03:30:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:30:43,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-11-23 03:30:43,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-11-23 03:30:43,275 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-23 03:30:43,275 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-23 03:30:43,275 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:30:43,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:30:43,275 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-23 03:30:43,275 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-23 03:30:43,275 INFO L130 BoogieDeclarations]: Found specification of procedure atm_dev_deregister [2021-11-23 03:30:43,276 INFO L138 BoogieDeclarations]: Found implementation of procedure atm_dev_deregister [2021-11-23 03:30:43,276 INFO L130 BoogieDeclarations]: Found specification of procedure read_prom_byte [2021-11-23 03:30:43,276 INFO L138 BoogieDeclarations]: Found implementation of procedure read_prom_byte [2021-11-23 03:30:43,276 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 03:30:43,276 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 03:30:43,276 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-23 03:30:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-23 03:30:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 03:30:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 03:30:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-23 03:30:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-23 03:30:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2021-11-23 03:30:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2021-11-23 03:30:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:30:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 03:30:43,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2021-11-23 03:30:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:30:43,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:30:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_free [2021-11-23 03:30:43,279 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_free [2021-11-23 03:30:44,102 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:30:44,109 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:30:44,687 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:30:48,413 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:30:49,603 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:30:49,603 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:30:49,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:49 BoogieIcfgContainer [2021-11-23 03:30:49,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:30:49,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:30:49,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:30:49,617 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:30:49,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:30:38" (1/3) ... [2021-11-23 03:30:49,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ebef98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:49, skipping insertion in model container [2021-11-23 03:30:49,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:42" (2/3) ... [2021-11-23 03:30:49,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ebef98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:49, skipping insertion in model container [2021-11-23 03:30:49,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:49" (3/3) ... [2021-11-23 03:30:49,621 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i [2021-11-23 03:30:49,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:30:49,628 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:30:49,714 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:30:49,728 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 03:30:49,729 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:30:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 1352 states, 772 states have (on average 1.2953367875647668) internal successors, (1000), 795 states have internal predecessors, (1000), 510 states have call successors, (510), 69 states have call predecessors, (510), 68 states have return successors, (504), 499 states have call predecessors, (504), 504 states have call successors, (504) [2021-11-23 03:30:49,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 03:30:49,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:49,801 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:49,802 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash 2091646374, now seen corresponding path program 1 times [2021-11-23 03:30:49,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:49,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224699420] [2021-11-23 03:30:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:49,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:30:50,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:50,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224699420] [2021-11-23 03:30:50,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224699420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:50,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:50,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277490510] [2021-11-23 03:30:50,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:50,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:50,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:50,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:50,494 INFO L87 Difference]: Start difference. First operand has 1352 states, 772 states have (on average 1.2953367875647668) internal successors, (1000), 795 states have internal predecessors, (1000), 510 states have call successors, (510), 69 states have call predecessors, (510), 68 states have return successors, (504), 499 states have call predecessors, (504), 504 states have call successors, (504) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:30:53,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:30:53,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:53,920 INFO L93 Difference]: Finished difference Result 3222 states and 4796 transitions. [2021-11-23 03:30:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 56 [2021-11-23 03:30:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:53,956 INFO L225 Difference]: With dead ends: 3222 [2021-11-23 03:30:53,956 INFO L226 Difference]: Without dead ends: 1860 [2021-11-23 03:30:53,970 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 03:30:53,974 INFO L933 BasicCegarLoop]: 2169 mSDtfsCounter, 766 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 3955 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:53,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 3955 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 391 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 03:30:54,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-11-23 03:30:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1850. [2021-11-23 03:30:54,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1075 states have (on average 1.2855813953488373) internal successors, (1382), 1095 states have internal predecessors, (1382), 668 states have call successors, (668), 108 states have call predecessors, (668), 106 states have return successors, (667), 658 states have call predecessors, (667), 667 states have call successors, (667) [2021-11-23 03:30:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2717 transitions. [2021-11-23 03:30:54,310 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2717 transitions. Word has length 56 [2021-11-23 03:30:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:54,311 INFO L470 AbstractCegarLoop]: Abstraction has 1850 states and 2717 transitions. [2021-11-23 03:30:54,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:30:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2717 transitions. [2021-11-23 03:30:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 03:30:54,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:54,316 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:54,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:30:54,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1088288041, now seen corresponding path program 1 times [2021-11-23 03:30:54,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:54,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485191979] [2021-11-23 03:30:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:54,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:30:54,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485191979] [2021-11-23 03:30:54,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485191979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:54,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:54,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:30:54,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360148387] [2021-11-23 03:30:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:54,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:30:54,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:30:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:30:54,485 INFO L87 Difference]: Start difference. First operand 1850 states and 2717 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:30:57,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:30:59,518 WARN L534 Checker$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 03:30:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:59,737 INFO L93 Difference]: Finished difference Result 4379 states and 6411 transitions. [2021-11-23 03:30:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:30:59,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-11-23 03:30:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:59,765 INFO L225 Difference]: With dead ends: 4379 [2021-11-23 03:30:59,766 INFO L226 Difference]: Without dead ends: 2540 [2021-11-23 03:30:59,858 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 03:30:59,865 INFO L933 BasicCegarLoop]: 2369 mSDtfsCounter, 901 mSDsluCounter, 1963 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:59,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 4170 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 385 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-11-23 03:30:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-11-23 03:31:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2537. [2021-11-23 03:31:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 1500 states have (on average 1.306) internal successors, (1959), 1533 states have internal predecessors, (1959), 874 states have call successors, (874), 164 states have call predecessors, (874), 162 states have return successors, (873), 860 states have call predecessors, (873), 873 states have call successors, (873) [2021-11-23 03:31:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3706 transitions. [2021-11-23 03:31:00,160 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3706 transitions. Word has length 55 [2021-11-23 03:31:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:00,161 INFO L470 AbstractCegarLoop]: Abstraction has 2537 states and 3706 transitions. [2021-11-23 03:31:00,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:31:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3706 transitions. [2021-11-23 03:31:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:31:00,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:00,168 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-23 03:31:00,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:31:00,168 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:00,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:00,169 INFO L85 PathProgramCache]: Analyzing trace with hash 23852923, now seen corresponding path program 1 times [2021-11-23 03:31:00,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:00,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059407963] [2021-11-23 03:31:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:00,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-23 03:31:00,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:00,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059407963] [2021-11-23 03:31:00,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059407963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:00,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:00,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:31:00,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22092956] [2021-11-23 03:31:00,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:00,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:31:00,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:00,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:31:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:00,428 INFO L87 Difference]: Start difference. First operand 2537 states and 3706 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 03:31:03,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:05,396 WARN L534 Checker$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 03:31:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:05,904 INFO L93 Difference]: Finished difference Result 3828 states and 5563 transitions. [2021-11-23 03:31:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 70 [2021-11-23 03:31:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:05,946 INFO L225 Difference]: With dead ends: 3828 [2021-11-23 03:31:05,947 INFO L226 Difference]: Without dead ends: 3825 [2021-11-23 03:31:05,951 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 03:31:05,952 INFO L933 BasicCegarLoop]: 2021 mSDtfsCounter, 955 mSDsluCounter, 1825 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3697 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:05,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 3697 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 323 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 03:31:05,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2021-11-23 03:31:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3778. [2021-11-23 03:31:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 2321 states have (on average 1.3162429987074538) internal successors, (3055), 2361 states have internal predecessors, (3055), 1190 states have call successors, (1190), 269 states have call predecessors, (1190), 266 states have return successors, (1232), 1172 states have call predecessors, (1232), 1189 states have call successors, (1232) [2021-11-23 03:31:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 5477 transitions. [2021-11-23 03:31:06,350 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 5477 transitions. Word has length 70 [2021-11-23 03:31:06,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:06,354 INFO L470 AbstractCegarLoop]: Abstraction has 3778 states and 5477 transitions. [2021-11-23 03:31:06,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 03:31:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 5477 transitions. [2021-11-23 03:31:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 03:31:06,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:06,366 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2021-11-23 03:31:06,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:31:06,366 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash 675735805, now seen corresponding path program 1 times [2021-11-23 03:31:06,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919791712] [2021-11-23 03:31:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:06,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 03:31:06,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:06,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919791712] [2021-11-23 03:31:06,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919791712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:06,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:06,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:31:06,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007540147] [2021-11-23 03:31:06,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:06,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:31:06,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:06,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:31:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:06,623 INFO L87 Difference]: Start difference. First operand 3778 states and 5477 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:31:09,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:12,231 WARN L534 Checker$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 03:31:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:12,500 INFO L93 Difference]: Finished difference Result 9243 states and 13329 transitions. [2021-11-23 03:31:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 112 [2021-11-23 03:31:12,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:12,564 INFO L225 Difference]: With dead ends: 9243 [2021-11-23 03:31:12,564 INFO L226 Difference]: Without dead ends: 5484 [2021-11-23 03:31:12,596 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 03:31:12,597 INFO L933 BasicCegarLoop]: 2289 mSDtfsCounter, 1022 mSDsluCounter, 1933 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 4062 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:12,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 4062 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 421 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-11-23 03:31:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2021-11-23 03:31:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 5463. [2021-11-23 03:31:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5463 states, 3401 states have (on average 1.3099088503381358) internal successors, (4455), 3458 states have internal predecessors, (4455), 1648 states have call successors, (1648), 418 states have call predecessors, (1648), 413 states have return successors, (1707), 1623 states have call predecessors, (1707), 1647 states have call successors, (1707) [2021-11-23 03:31:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7810 transitions. [2021-11-23 03:31:13,072 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7810 transitions. Word has length 112 [2021-11-23 03:31:13,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:13,075 INFO L470 AbstractCegarLoop]: Abstraction has 5463 states and 7810 transitions. [2021-11-23 03:31:13,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:31:13,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7810 transitions. [2021-11-23 03:31:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 03:31:13,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:13,091 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2021-11-23 03:31:13,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:31:13,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash 483497087, now seen corresponding path program 1 times [2021-11-23 03:31:13,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:13,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949521014] [2021-11-23 03:31:13,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:13,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 03:31:13,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949521014] [2021-11-23 03:31:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949521014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:13,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:13,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:31:13,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998033664] [2021-11-23 03:31:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:31:13,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:13,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:31:13,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:13,492 INFO L87 Difference]: Start difference. First operand 5463 states and 7810 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:31:17,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:19,802 WARN L534 Checker$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 03:31:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:20,096 INFO L93 Difference]: Finished difference Result 12421 states and 18046 transitions. [2021-11-23 03:31:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:31:20,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 111 [2021-11-23 03:31:20,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:20,165 INFO L225 Difference]: With dead ends: 12421 [2021-11-23 03:31:20,165 INFO L226 Difference]: Without dead ends: 6977 [2021-11-23 03:31:20,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:20,198 INFO L933 BasicCegarLoop]: 2156 mSDtfsCounter, 232 mSDsluCounter, 6724 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 8350 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:20,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 8350 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 731 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-23 03:31:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6977 states. [2021-11-23 03:31:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6977 to 5487. [2021-11-23 03:31:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 3419 states have (on average 1.3082772740567417) internal successors, (4473), 3476 states have internal predecessors, (4473), 1648 states have call successors, (1648), 418 states have call predecessors, (1648), 419 states have return successors, (1730), 1629 states have call predecessors, (1730), 1647 states have call successors, (1730) [2021-11-23 03:31:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 7851 transitions. [2021-11-23 03:31:20,577 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 7851 transitions. Word has length 111 [2021-11-23 03:31:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:20,578 INFO L470 AbstractCegarLoop]: Abstraction has 5487 states and 7851 transitions. [2021-11-23 03:31:20,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-23 03:31:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 7851 transitions. [2021-11-23 03:31:20,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 03:31:20,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:20,584 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2021-11-23 03:31:20,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:31:20,584 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash -629352240, now seen corresponding path program 1 times [2021-11-23 03:31:20,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:20,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138728147] [2021-11-23 03:31:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:20,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 03:31:21,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:21,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138728147] [2021-11-23 03:31:21,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138728147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:21,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:21,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:31:21,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846268100] [2021-11-23 03:31:21,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:21,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:31:21,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:31:21,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:31:21,049 INFO L87 Difference]: Start difference. First operand 5487 states and 7851 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-23 03:31:25,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:28,274 WARN L534 Checker$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 03:31:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:28,644 INFO L93 Difference]: Finished difference Result 13519 states and 19876 transitions. [2021-11-23 03:31:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:31:28,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2021-11-23 03:31:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:28,710 INFO L225 Difference]: With dead ends: 13519 [2021-11-23 03:31:28,711 INFO L226 Difference]: Without dead ends: 8051 [2021-11-23 03:31:28,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:31:28,742 INFO L933 BasicCegarLoop]: 2106 mSDtfsCounter, 1054 mSDsluCounter, 11133 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 245 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 12363 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:28,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 12363 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 1188 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 03:31:28,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-11-23 03:31:29,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5723. [2021-11-23 03:31:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 3561 states have (on average 1.306093793878124) internal successors, (4651), 3618 states have internal predecessors, (4651), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2021-11-23 03:31:29,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 8220 transitions. [2021-11-23 03:31:29,139 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 8220 transitions. Word has length 115 [2021-11-23 03:31:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:29,139 INFO L470 AbstractCegarLoop]: Abstraction has 5723 states and 8220 transitions. [2021-11-23 03:31:29,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-23 03:31:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 8220 transitions. [2021-11-23 03:31:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-23 03:31:29,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:29,145 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:31:29,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:31:29,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:29,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:29,146 INFO L85 PathProgramCache]: Analyzing trace with hash -149857921, now seen corresponding path program 1 times [2021-11-23 03:31:29,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:29,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420184305] [2021-11-23 03:31:29,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:29,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-23 03:31:29,283 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420184305] [2021-11-23 03:31:29,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420184305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:29,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:29,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:31:29,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758971753] [2021-11-23 03:31:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:29,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:31:29,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:31:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:29,286 INFO L87 Difference]: Start difference. First operand 5723 states and 8220 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:31:32,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:34,728 WARN L534 Checker$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 03:31:35,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:35,298 INFO L93 Difference]: Finished difference Result 13093 states and 19144 transitions. [2021-11-23 03:31:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:31:35,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2021-11-23 03:31:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:35,339 INFO L225 Difference]: With dead ends: 13093 [2021-11-23 03:31:35,340 INFO L226 Difference]: Without dead ends: 7389 [2021-11-23 03:31:35,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:31:35,370 INFO L933 BasicCegarLoop]: 2059 mSDtfsCounter, 426 mSDsluCounter, 4204 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 5919 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:35,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 5919 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 543 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-23 03:31:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2021-11-23 03:31:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 5739. [2021-11-23 03:31:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5739 states, 3577 states have (on average 1.3047246295778585) internal successors, (4667), 3634 states have internal predecessors, (4667), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2021-11-23 03:31:35,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 8236 transitions. [2021-11-23 03:31:35,744 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 8236 transitions. Word has length 121 [2021-11-23 03:31:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:35,744 INFO L470 AbstractCegarLoop]: Abstraction has 5739 states and 8236 transitions. [2021-11-23 03:31:35,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 03:31:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 8236 transitions. [2021-11-23 03:31:35,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-23 03:31:35,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:35,755 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 4, 3, 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] [2021-11-23 03:31:35,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:31:35,756 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:35,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 71703760, now seen corresponding path program 1 times [2021-11-23 03:31:35,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:35,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134348701] [2021-11-23 03:31:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:35,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-23 03:31:35,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:35,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134348701] [2021-11-23 03:31:35,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134348701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:35,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:31:35,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:31:35,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081676860] [2021-11-23 03:31:35,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:35,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:31:35,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:31:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:31:35,984 INFO L87 Difference]: Start difference. First operand 5739 states and 8236 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-23 03:31:38,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:41,171 WARN L534 Checker$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 03:31:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:41,679 INFO L93 Difference]: Finished difference Result 11515 states and 16542 transitions. [2021-11-23 03:31:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:41,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 241 [2021-11-23 03:31:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:41,714 INFO L225 Difference]: With dead ends: 11515 [2021-11-23 03:31:41,714 INFO L226 Difference]: Without dead ends: 5795 [2021-11-23 03:31:41,734 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 03:31:41,735 INFO L933 BasicCegarLoop]: 1818 mSDtfsCounter, 4 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:41,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 3624 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 03:31:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2021-11-23 03:31:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 5759. [2021-11-23 03:31:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5759 states, 3597 states have (on average 1.303030303030303) internal successors, (4687), 3654 states have internal predecessors, (4687), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2021-11-23 03:31:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 8256 transitions. [2021-11-23 03:31:42,093 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 8256 transitions. Word has length 241 [2021-11-23 03:31:42,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:42,093 INFO L470 AbstractCegarLoop]: Abstraction has 5759 states and 8256 transitions. [2021-11-23 03:31:42,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-23 03:31:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 8256 transitions. [2021-11-23 03:31:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-23 03:31:42,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:42,110 INFO L514 BasicCegarLoop]: trace histogram [14, 8, 8, 8, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:31:42,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:31:42,111 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1030718864, now seen corresponding path program 1 times [2021-11-23 03:31:42,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:42,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814632901] [2021-11-23 03:31:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:42,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-11-23 03:31:42,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:42,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814632901] [2021-11-23 03:31:42,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814632901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:31:42,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753842022] [2021-11-23 03:31:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:42,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:42,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:42,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:31:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:31:43,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 03:31:44,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:31:44,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753842022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:31:44,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:31:44,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-11-23 03:31:44,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716299172] [2021-11-23 03:31:44,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:31:44,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:31:44,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:31:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:31:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:44,016 INFO L87 Difference]: Start difference. First operand 5759 states and 8256 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-23 03:31:46,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:31:48,922 WARN L534 Checker$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 03:31:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:31:49,254 INFO L93 Difference]: Finished difference Result 11619 states and 16698 transitions. [2021-11-23 03:31:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:31:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 297 [2021-11-23 03:31:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:31:49,283 INFO L225 Difference]: With dead ends: 11619 [2021-11-23 03:31:49,283 INFO L226 Difference]: Without dead ends: 5879 [2021-11-23 03:31:49,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:31:49,302 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 9 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3642 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:31:49,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 3642 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 341 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 03:31:49,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2021-11-23 03:31:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 5771. [2021-11-23 03:31:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5771 states, 3609 states have (on average 1.3020227209753394) internal successors, (4699), 3666 states have internal predecessors, (4699), 1742 states have call successors, (1742), 418 states have call predecessors, (1742), 419 states have return successors, (1827), 1723 states have call predecessors, (1827), 1741 states have call successors, (1827) [2021-11-23 03:31:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 8268 transitions. [2021-11-23 03:31:49,620 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 8268 transitions. Word has length 297 [2021-11-23 03:31:49,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:31:49,621 INFO L470 AbstractCegarLoop]: Abstraction has 5771 states and 8268 transitions. [2021-11-23 03:31:49,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-23 03:31:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 8268 transitions. [2021-11-23 03:31:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-11-23 03:31:49,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:31:49,636 INFO L514 BasicCegarLoop]: trace histogram [26, 15, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:31:49,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 03:31:49,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:31:49,859 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:31:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:31:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1112110004, now seen corresponding path program 1 times [2021-11-23 03:31:49,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:31:49,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472067553] [2021-11-23 03:31:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:49,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:31:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-11-23 03:31:50,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:31:50,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472067553] [2021-11-23 03:31:50,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472067553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:31:50,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506468588] [2021-11-23 03:31:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:31:50,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:31:50,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:31:50,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:31:50,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_955d5a7d-db79-496a-99d9-ca7519f7f260/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:31:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:31:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 3399 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:31:51,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:31:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 344 proven. 1 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2021-11-23 03:31:52,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2021-11-23 03:31:53,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506468588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:31:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098190917] [2021-11-23 03:31:53,244 INFO L159 IcfgInterpreter]: Started Sifa with 199 locations of interest [2021-11-23 03:31:53,244 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:31:53,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:31:53,255 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:31:53,256 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs