./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/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_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:23:03,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:23:03,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:23:03,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:23:03,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:23:03,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:23:03,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:23:03,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:23:03,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:23:03,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:23:03,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:23:03,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:23:03,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:23:03,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:23:03,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:23:03,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:23:03,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:23:03,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:23:03,102 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:23:03,104 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:23:03,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:23:03,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:23:03,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:23:03,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:23:03,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:23:03,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:23:03,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:23:03,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:23:03,126 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:23:03,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:23:03,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:23:03,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:23:03,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:23:03,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:23:03,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:23:03,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:23:03,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:23:03,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:23:03,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:23:03,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:23:03,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:23:03,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:23:03,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:23:03,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:23:03,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:23:03,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:23:03,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:23:03,187 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:23:03,187 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:23:03,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:23:03,187 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:23:03,188 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:23:03,189 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:23:03,189 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:23:03,189 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:23:03,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:23:03,190 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:23:03,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:23:03,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:23:03,190 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:23:03,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:23:03,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:23:03,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:23:03,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:23:03,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:23:03,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:23:03,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:23:03,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:23:03,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:23:03,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:23:03,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:23:03,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:23:03,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:23:03,196 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:23:03,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:23:03,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:23:03,197 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:23:03,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:23:03,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:23:03,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:23:03,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7001fc39e766418166b5245dd523731096962c63b3f1d8b8399a7fc1e7a88c5f [2022-11-19 07:23:03,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:23:03,518 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:23:03,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:23:03,522 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:23:03,523 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:23:03,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/../../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 [2022-11-19 07:23:03,606 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/data/e0ab4249e/e159526c7e8c44d7ad2b82a9c2464835/FLAG269ce7586 [2022-11-19 07:23:04,654 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:23:04,659 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/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 [2022-11-19 07:23:04,702 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/data/e0ab4249e/e159526c7e8c44d7ad2b82a9c2464835/FLAG269ce7586 [2022-11-19 07:23:05,034 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/data/e0ab4249e/e159526c7e8c44d7ad2b82a9c2464835 [2022-11-19 07:23:05,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:23:05,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:23:05,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:23:05,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:23:05,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:23:05,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:23:05" (1/1) ... [2022-11-19 07:23:05,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a739da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:05, skipping insertion in model container [2022-11-19 07:23:05,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:23:05" (1/1) ... [2022-11-19 07:23:05,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:23:05,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:23:05,829 WARN L1258 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6037] [2022-11-19 07:23:05,829 WARN L1258 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6038-6039] [2022-11-19 07:23:06,439 WARN L234 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_3e658a31-e28c-46c3-81bd-28f5a34f7367/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] [2022-11-19 07:23:07,522 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-19 07:23:07,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:23:07,580 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:23:07,766 WARN L1258 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6037] [2022-11-19 07:23:07,766 WARN L1258 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6038-6039] [2022-11-19 07:23:07,782 WARN L234 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_3e658a31-e28c-46c3-81bd-28f5a34f7367/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] [2022-11-19 07:23:08,148 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-19 07:23:08,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:23:08,241 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:23:08,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08 WrapperNode [2022-11-19 07:23:08,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:23:08,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:23:08,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:23:08,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:23:08,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,595 INFO L138 Inliner]: procedures = 259, calls = 2016, calls flagged for inlining = 128, calls inlined = 102, statements flattened = 4868 [2022-11-19 07:23:08,596 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:23:08,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:23:08,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:23:08,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:23:08,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,690 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,846 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:23:08,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:23:08,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:23:08,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:23:08,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (1/1) ... [2022-11-19 07:23:08,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:23:08,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:08,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:23:08,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:23:08,974 INFO L130 BoogieDeclarations]: Found specification of procedure he_remove_one [2022-11-19 07:23:08,974 INFO L138 BoogieDeclarations]: Found implementation of procedure he_remove_one [2022-11-19 07:23:08,974 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-19 07:23:08,975 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-19 07:23:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure remove_wait_queue [2022-11-19 07:23:08,975 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_wait_queue [2022-11-19 07:23:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-19 07:23:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:23:08,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:23:08,975 INFO L130 BoogieDeclarations]: Found specification of procedure he_close [2022-11-19 07:23:08,976 INFO L138 BoogieDeclarations]: Found implementation of procedure he_close [2022-11-19 07:23:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_alloc [2022-11-19 07:23:08,976 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_alloc [2022-11-19 07:23:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-19 07:23:08,976 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-19 07:23:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-19 07:23:08,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-19 07:23:08,976 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:23:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:23:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure he_phy_get [2022-11-19 07:23:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure he_phy_get [2022-11-19 07:23:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2022-11-19 07:23:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2022-11-19 07:23:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_word [2022-11-19 07:23:08,977 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_word [2022-11-19 07:23:08,977 INFO L130 BoogieDeclarations]: Found specification of procedure __alloc_tpd [2022-11-19 07:23:08,978 INFO L138 BoogieDeclarations]: Found implementation of procedure __alloc_tpd [2022-11-19 07:23:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure rate_to_atmf [2022-11-19 07:23:08,978 INFO L138 BoogieDeclarations]: Found implementation of procedure rate_to_atmf [2022-11-19 07:23:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:23:08,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:23:08,978 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 07:23:08,978 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 07:23:08,979 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 07:23:08,979 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 07:23:08,979 INFO L130 BoogieDeclarations]: Found specification of procedure he_phy_put [2022-11-19 07:23:08,979 INFO L138 BoogieDeclarations]: Found implementation of procedure he_phy_put [2022-11-19 07:23:08,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 07:23:08,979 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 07:23:08,979 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:23:08,979 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:23:08,980 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-19 07:23:08,980 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-19 07:23:08,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:23:08,980 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 07:23:08,980 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 07:23:08,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:23:08,980 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_create [2022-11-19 07:23:08,980 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_create [2022-11-19 07:23:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-19 07:23:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-19 07:23:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 07:23:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 07:23:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_destroy [2022-11-19 07:23:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_destroy [2022-11-19 07:23:08,981 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_single [2022-11-19 07:23:08,981 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_single [2022-11-19 07:23:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure he_readl_internal [2022-11-19 07:23:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure he_readl_internal [2022-11-19 07:23:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:23:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:23:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-11-19 07:23:08,982 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-11-19 07:23:08,982 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_word [2022-11-19 07:23:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_word [2022-11-19 07:23:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_byte [2022-11-19 07:23:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_byte [2022-11-19 07:23:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:23:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:23:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure he_send [2022-11-19 07:23:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure he_send [2022-11-19 07:23:08,983 INFO L130 BoogieDeclarations]: Found specification of procedure add_wait_queue [2022-11-19 07:23:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure add_wait_queue [2022-11-19 07:23:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 07:23:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 07:23:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-11-19 07:23:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-11-19 07:23:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2022-11-19 07:23:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2022-11-19 07:23:08,984 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 07:23:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 07:23:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure he_writel_internal [2022-11-19 07:23:08,985 INFO L138 BoogieDeclarations]: Found implementation of procedure he_writel_internal [2022-11-19 07:23:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure he_ioctl [2022-11-19 07:23:08,985 INFO L138 BoogieDeclarations]: Found implementation of procedure he_ioctl [2022-11-19 07:23:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:23:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure he_open [2022-11-19 07:23:08,985 INFO L138 BoogieDeclarations]: Found implementation of procedure he_open [2022-11-19 07:23:08,985 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-19 07:23:08,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-19 07:23:08,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-19 07:23:08,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-19 07:23:08,986 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:23:08,986 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:23:08,986 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-19 07:23:08,986 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-19 07:23:08,986 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-19 07:23:08,987 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-19 07:23:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:23:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-19 07:23:08,988 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-19 07:23:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure he_stop [2022-11-19 07:23:08,989 INFO L138 BoogieDeclarations]: Found implementation of procedure he_stop [2022-11-19 07:23:08,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:23:08,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:23:08,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:23:08,989 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-19 07:23:08,989 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-19 07:23:08,989 INFO L130 BoogieDeclarations]: Found specification of procedure __enqueue_tpd [2022-11-19 07:23:08,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __enqueue_tpd [2022-11-19 07:23:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-19 07:23:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-19 07:23:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:23:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2022-11-19 07:23:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2022-11-19 07:23:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-19 07:23:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-19 07:23:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-19 07:23:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-19 07:23:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:23:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_dword [2022-11-19 07:23:08,991 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_dword [2022-11-19 07:23:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:23:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-19 07:23:08,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-19 07:23:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-19 07:23:08,991 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-19 07:23:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-19 07:23:08,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-19 07:23:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-19 07:23:08,992 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-19 07:23:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure atm_dev_deregister [2022-11-19 07:23:08,992 INFO L138 BoogieDeclarations]: Found implementation of procedure atm_dev_deregister [2022-11-19 07:23:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure read_prom_byte [2022-11-19 07:23:08,992 INFO L138 BoogieDeclarations]: Found implementation of procedure read_prom_byte [2022-11-19 07:23:08,992 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-19 07:23:08,993 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-19 07:23:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-19 07:23:08,993 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-19 07:23:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-19 07:23:08,993 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-19 07:23:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 07:23:08,993 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 07:23:08,993 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2022-11-19 07:23:08,994 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2022-11-19 07:23:08,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:23:08,994 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-11-19 07:23:08,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-11-19 07:23:08,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:23:08,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:23:08,994 INFO L130 BoogieDeclarations]: Found specification of procedure dma_pool_free [2022-11-19 07:23:08,994 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_pool_free [2022-11-19 07:23:09,820 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:23:09,826 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:23:10,375 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:23:14,513 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:23:16,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:23:16,348 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:23:16,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:23:16 BoogieIcfgContainer [2022-11-19 07:23:16,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:23:16,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:23:16,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:23:16,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:23:16,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:23:05" (1/3) ... [2022-11-19 07:23:16,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147e87fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:23:16, skipping insertion in model container [2022-11-19 07:23:16,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:23:08" (2/3) ... [2022-11-19 07:23:16,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147e87fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:23:16, skipping insertion in model container [2022-11-19 07:23:16,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:23:16" (3/3) ... [2022-11-19 07:23:16,365 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_bitvector_linux-3.16-rc1.tar.xz-43_2a-drivers--atm--he.ko-entry_point.cil.out.i [2022-11-19 07:23:16,386 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:23:16,386 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:23:16,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:23:16,474 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d1116b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:23:16,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:23:16,483 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) [2022-11-19 07:23:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-19 07:23:16,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:16,503 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:16,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -164664384, now seen corresponding path program 1 times [2022-11-19 07:23:16,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:16,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770453364] [2022-11-19 07:23:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:23:17,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:17,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770453364] [2022-11-19 07:23:17,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770453364] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:17,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:17,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88979856] [2022-11-19 07:23:17,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:17,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:17,283 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) [2022-11-19 07:23:20,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:20,476 INFO L93 Difference]: Finished difference Result 3222 states and 4796 transitions. [2022-11-19 07:23:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:20,479 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 [2022-11-19 07:23:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:20,522 INFO L225 Difference]: With dead ends: 3222 [2022-11-19 07:23:20,522 INFO L226 Difference]: Without dead ends: 1860 [2022-11-19 07:23:20,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:20,544 INFO L413 NwaCegarLoop]: 2171 mSDtfsCounter, 766 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 3960 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:20,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 3960 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:23:20,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-11-19 07:23:20,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1850. [2022-11-19 07:23:20,852 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) [2022-11-19 07:23:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2717 transitions. [2022-11-19 07:23:20,870 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2717 transitions. Word has length 56 [2022-11-19 07:23:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:20,871 INFO L495 AbstractCegarLoop]: Abstraction has 1850 states and 2717 transitions. [2022-11-19 07:23:20,872 INFO L496 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) [2022-11-19 07:23:20,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2717 transitions. [2022-11-19 07:23:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 07:23:20,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:20,880 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:20,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:23:20,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1051276609, now seen corresponding path program 1 times [2022-11-19 07:23:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:20,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754084839] [2022-11-19 07:23:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:20,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:23:21,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754084839] [2022-11-19 07:23:21,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754084839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:21,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:21,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813836726] [2022-11-19 07:23:21,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:21,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:21,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:21,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:21,110 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) [2022-11-19 07:23:23,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:24,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:24,130 INFO L93 Difference]: Finished difference Result 4379 states and 6411 transitions. [2022-11-19 07:23:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:24,132 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 [2022-11-19 07:23:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:24,152 INFO L225 Difference]: With dead ends: 4379 [2022-11-19 07:23:24,152 INFO L226 Difference]: Without dead ends: 2540 [2022-11-19 07:23:24,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:24,164 INFO L413 NwaCegarLoop]: 2372 mSDtfsCounter, 901 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 4176 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:24,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 4176 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 07:23:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-11-19 07:23:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2537. [2022-11-19 07:23:24,417 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) [2022-11-19 07:23:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 3706 transitions. [2022-11-19 07:23:24,437 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 3706 transitions. Word has length 55 [2022-11-19 07:23:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:24,438 INFO L495 AbstractCegarLoop]: Abstraction has 2537 states and 3706 transitions. [2022-11-19 07:23:24,438 INFO L496 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) [2022-11-19 07:23:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 3706 transitions. [2022-11-19 07:23:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 07:23:24,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:24,444 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:24,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:23:24,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:24,447 INFO L85 PathProgramCache]: Analyzing trace with hash 541475436, now seen corresponding path program 1 times [2022-11-19 07:23:24,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:24,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719633470] [2022-11-19 07:23:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:24,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-19 07:23:24,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:24,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719633470] [2022-11-19 07:23:24,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719633470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:24,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:24,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:24,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451012379] [2022-11-19 07:23:24,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:24,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:24,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:24,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:24,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:24,691 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) [2022-11-19 07:23:27,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:27,711 INFO L93 Difference]: Finished difference Result 3828 states and 5563 transitions. [2022-11-19 07:23:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:27,713 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 [2022-11-19 07:23:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:27,741 INFO L225 Difference]: With dead ends: 3828 [2022-11-19 07:23:27,741 INFO L226 Difference]: Without dead ends: 3825 [2022-11-19 07:23:27,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:27,746 INFO L413 NwaCegarLoop]: 2020 mSDtfsCounter, 955 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3702 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:27,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 3702 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 318 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 07:23:27,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2022-11-19 07:23:27,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3778. [2022-11-19 07:23:27,978 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) [2022-11-19 07:23:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 5477 transitions. [2022-11-19 07:23:28,010 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 5477 transitions. Word has length 70 [2022-11-19 07:23:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:28,013 INFO L495 AbstractCegarLoop]: Abstraction has 3778 states and 5477 transitions. [2022-11-19 07:23:28,013 INFO L496 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) [2022-11-19 07:23:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 5477 transitions. [2022-11-19 07:23:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:23:28,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:28,020 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:28,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:23:28,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:28,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1593109290, now seen corresponding path program 1 times [2022-11-19 07:23:28,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:28,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371773426] [2022-11-19 07:23:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:28,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-19 07:23:28,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:28,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371773426] [2022-11-19 07:23:28,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371773426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:28,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:28,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:28,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472379496] [2022-11-19 07:23:28,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:28,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:28,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:28,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:28,344 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) [2022-11-19 07:23:31,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:31,895 INFO L93 Difference]: Finished difference Result 9243 states and 13329 transitions. [2022-11-19 07:23:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:31,896 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 [2022-11-19 07:23:31,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:31,939 INFO L225 Difference]: With dead ends: 9243 [2022-11-19 07:23:31,939 INFO L226 Difference]: Without dead ends: 5484 [2022-11-19 07:23:31,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:31,968 INFO L413 NwaCegarLoop]: 2290 mSDtfsCounter, 1022 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:31,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 4066 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 417 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 07:23:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2022-11-19 07:23:32,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 5463. [2022-11-19 07:23:32,379 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) [2022-11-19 07:23:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 7810 transitions. [2022-11-19 07:23:32,413 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 7810 transitions. Word has length 112 [2022-11-19 07:23:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:32,416 INFO L495 AbstractCegarLoop]: Abstraction has 5463 states and 7810 transitions. [2022-11-19 07:23:32,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (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) [2022-11-19 07:23:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 7810 transitions. [2022-11-19 07:23:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:23:32,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:32,427 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:32,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:23:32,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:32,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:32,431 INFO L85 PathProgramCache]: Analyzing trace with hash -340679902, now seen corresponding path program 1 times [2022-11-19 07:23:32,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:32,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344137289] [2022-11-19 07:23:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:32,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:33,440 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-19 07:23:33,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:33,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344137289] [2022-11-19 07:23:33,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344137289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:33,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:33,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:23:33,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456172162] [2022-11-19 07:23:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:33,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:23:33,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:23:33,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:33,448 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) [2022-11-19 07:23:36,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:37,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:37,325 INFO L93 Difference]: Finished difference Result 12421 states and 18046 transitions. [2022-11-19 07:23:37,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:23:37,325 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 [2022-11-19 07:23:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:37,374 INFO L225 Difference]: With dead ends: 12421 [2022-11-19 07:23:37,375 INFO L226 Difference]: Without dead ends: 6977 [2022-11-19 07:23:37,402 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:23:37,403 INFO L413 NwaCegarLoop]: 2161 mSDtfsCounter, 232 mSDsluCounter, 6200 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 8361 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:37,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 8361 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-11-19 07:23:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6977 states. [2022-11-19 07:23:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6977 to 5487. [2022-11-19 07:23:37,771 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) [2022-11-19 07:23:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 7851 transitions. [2022-11-19 07:23:37,801 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 7851 transitions. Word has length 111 [2022-11-19 07:23:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:37,802 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 7851 transitions. [2022-11-19 07:23:37,802 INFO L496 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) [2022-11-19 07:23:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 7851 transitions. [2022-11-19 07:23:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:23:37,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:37,806 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:37,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:23:37,807 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -103572761, now seen corresponding path program 1 times [2022-11-19 07:23:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:37,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306962717] [2022-11-19 07:23:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:37,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-19 07:23:39,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:39,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306962717] [2022-11-19 07:23:39,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306962717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:39,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:39,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:23:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655566983] [2022-11-19 07:23:39,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:39,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:23:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:39,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:23:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:23:39,615 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) [2022-11-19 07:23:44,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:45,555 INFO L93 Difference]: Finished difference Result 13519 states and 19876 transitions. [2022-11-19 07:23:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:23:45,556 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 [2022-11-19 07:23:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:45,607 INFO L225 Difference]: With dead ends: 13519 [2022-11-19 07:23:45,607 INFO L226 Difference]: Without dead ends: 8051 [2022-11-19 07:23:45,630 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:23:45,631 INFO L413 NwaCegarLoop]: 2110 mSDtfsCounter, 1053 mSDsluCounter, 10259 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 245 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 12369 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:45,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 12369 Invalid, 1440 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [245 Valid, 1194 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-11-19 07:23:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2022-11-19 07:23:46,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5723. [2022-11-19 07:23:46,090 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) [2022-11-19 07:23:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 8220 transitions. [2022-11-19 07:23:46,120 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 8220 transitions. Word has length 115 [2022-11-19 07:23:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:46,121 INFO L495 AbstractCegarLoop]: Abstraction has 5723 states and 8220 transitions. [2022-11-19 07:23:46,122 INFO L496 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) [2022-11-19 07:23:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 8220 transitions. [2022-11-19 07:23:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-19 07:23:46,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:46,126 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:46,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:23:46,127 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash 815341862, now seen corresponding path program 1 times [2022-11-19 07:23:46,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:46,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793011148] [2022-11-19 07:23:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:46,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-19 07:23:46,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:46,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793011148] [2022-11-19 07:23:46,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793011148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:46,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:46,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:23:46,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838956305] [2022-11-19 07:23:46,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:46,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:23:46,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:23:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:23:46,467 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) [2022-11-19 07:23:49,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:50,825 INFO L93 Difference]: Finished difference Result 13093 states and 19144 transitions. [2022-11-19 07:23:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:23:50,826 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 [2022-11-19 07:23:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:50,869 INFO L225 Difference]: With dead ends: 13093 [2022-11-19 07:23:50,870 INFO L226 Difference]: Without dead ends: 7389 [2022-11-19 07:23:50,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:50,896 INFO L413 NwaCegarLoop]: 2075 mSDtfsCounter, 409 mSDsluCounter, 3863 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 5938 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:50,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 5938 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 538 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-19 07:23:50,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-11-19 07:23:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 5739. [2022-11-19 07:23:51,365 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) [2022-11-19 07:23:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 8236 transitions. [2022-11-19 07:23:51,395 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 8236 transitions. Word has length 121 [2022-11-19 07:23:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:51,396 INFO L495 AbstractCegarLoop]: Abstraction has 5739 states and 8236 transitions. [2022-11-19 07:23:51,396 INFO L496 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) [2022-11-19 07:23:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 8236 transitions. [2022-11-19 07:23:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-19 07:23:51,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:51,404 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:51,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:23:51,405 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:51,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:51,405 INFO L85 PathProgramCache]: Analyzing trace with hash 884680085, now seen corresponding path program 1 times [2022-11-19 07:23:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:51,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567401820] [2022-11-19 07:23:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-19 07:23:51,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567401820] [2022-11-19 07:23:51,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567401820] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:51,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:51,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917182510] [2022-11-19 07:23:51,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:51,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:51,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:51,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:51,885 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) [2022-11-19 07:23:54,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:55,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:55,413 INFO L93 Difference]: Finished difference Result 11515 states and 16542 transitions. [2022-11-19 07:23:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:55,415 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 [2022-11-19 07:23:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:55,444 INFO L225 Difference]: With dead ends: 11515 [2022-11-19 07:23:55,445 INFO L226 Difference]: Without dead ends: 5795 [2022-11-19 07:23:55,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:55,465 INFO L413 NwaCegarLoop]: 1821 mSDtfsCounter, 4 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:55,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 3625 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-19 07:23:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2022-11-19 07:23:55,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 5759. [2022-11-19 07:23:55,858 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) [2022-11-19 07:23:55,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5759 states to 5759 states and 8256 transitions. [2022-11-19 07:23:55,885 INFO L78 Accepts]: Start accepts. Automaton has 5759 states and 8256 transitions. Word has length 241 [2022-11-19 07:23:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:55,886 INFO L495 AbstractCegarLoop]: Abstraction has 5759 states and 8256 transitions. [2022-11-19 07:23:55,887 INFO L496 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) [2022-11-19 07:23:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5759 states and 8256 transitions. [2022-11-19 07:23:55,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-19 07:23:55,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:55,897 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:23:55,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:23:55,898 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:55,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1588879885, now seen corresponding path program 1 times [2022-11-19 07:23:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530132726] [2022-11-19 07:23:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-11-19 07:23:56,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:56,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530132726] [2022-11-19 07:23:56,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530132726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:23:56,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544042560] [2022-11-19 07:23:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:56,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:56,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:56,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:56,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:23:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 3208 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:23:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-11-19 07:23:57,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:57,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544042560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:57,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:23:57,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-19 07:23:57,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540004730] [2022-11-19 07:23:57,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:57,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:57,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:57,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:57,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:23:57,900 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) [2022-11-19 07:24:00,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:01,181 INFO L93 Difference]: Finished difference Result 11619 states and 16698 transitions. [2022-11-19 07:24:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:01,182 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 [2022-11-19 07:24:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:01,211 INFO L225 Difference]: With dead ends: 11619 [2022-11-19 07:24:01,211 INFO L226 Difference]: Without dead ends: 5879 [2022-11-19 07:24:01,233 INFO L412 NwaCegarLoop]: 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 [2022-11-19 07:24:01,234 INFO L413 NwaCegarLoop]: 1832 mSDtfsCounter, 9 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:01,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 3649 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 336 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-11-19 07:24:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5879 states. [2022-11-19 07:24:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5879 to 5771. [2022-11-19 07:24:01,654 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) [2022-11-19 07:24:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5771 states to 5771 states and 8268 transitions. [2022-11-19 07:24:01,681 INFO L78 Accepts]: Start accepts. Automaton has 5771 states and 8268 transitions. Word has length 297 [2022-11-19 07:24:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:01,682 INFO L495 AbstractCegarLoop]: Abstraction has 5771 states and 8268 transitions. [2022-11-19 07:24:01,682 INFO L496 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) [2022-11-19 07:24:01,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5771 states and 8268 transitions. [2022-11-19 07:24:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-11-19 07:24:01,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:01,695 INFO L195 NwaCegarLoop]: 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] [2022-11-19 07:24:01,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:01,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:01,922 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1443332042, now seen corresponding path program 1 times [2022-11-19 07:24:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:01,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287782341] [2022-11-19 07:24:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2022-11-19 07:24:02,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287782341] [2022-11-19 07:24:02,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287782341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:02,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502176780] [2022-11-19 07:24:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:02,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:02,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:02,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:02,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e658a31-e28c-46c3-81bd-28f5a34f7367/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:24:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:04,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 3688 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:24:04,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 344 proven. 1 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-11-19 07:24:04,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1112 trivial. 0 not checked. [2022-11-19 07:24:04,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502176780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:04,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009399947] [2022-11-19 07:24:04,749 INFO L159 IcfgInterpreter]: Started Sifa with 199 locations of interest [2022-11-19 07:24:04,750 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:24:04,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:24:04,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:24:04,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs