./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 66bf0b457d4d5112c0b99aeef3b038fb34481370a385df3d77d1a982d2cba2ad --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:44:55,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:44:55,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:44:55,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:44:55,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:44:55,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:44:55,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:44:55,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:44:55,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:44:55,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:44:55,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:44:55,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:44:55,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:44:55,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:44:55,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:44:55,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:44:55,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:44:55,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:44:55,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:44:55,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:44:55,058 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:44:55,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:44:55,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:44:55,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:44:55,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:44:55,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:44:55,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:44:55,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:44:55,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:44:55,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:44:55,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:44:55,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:44:55,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:44:55,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:44:55,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:44:55,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:44:55,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:44:55,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:44:55,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:44:55,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:44:55,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:44:55,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:44:55,121 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:44:55,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:44:55,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:44:55,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:44:55,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:44:55,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:44:55,123 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:44:55,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:44:55,124 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:44:55,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:44:55,124 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:44:55,125 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:44:55,125 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:44:55,125 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:44:55,125 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:44:55,126 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:44:55,126 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:44:55,126 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:44:55,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:44:55,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:44:55,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:44:55,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:44:55,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:44:55,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:44:55,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:44:55,128 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:44:55,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:44:55,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:44:55,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:44:55,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:44:55,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:44:55,130 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:44:55,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:44:55,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:44:55,130 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:44:55,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:44:55,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:44:55,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:44:55,131 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_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66bf0b457d4d5112c0b99aeef3b038fb34481370a385df3d77d1a982d2cba2ad [2022-11-03 03:44:55,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:44:55,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:44:55,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:44:55,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:44:55,412 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:44:55,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i [2022-11-03 03:44:55,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/data/8d350e3b7/91592249126f40bfb04c42a838f066f4/FLAG8e93365bd [2022-11-03 03:44:56,399 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:44:56,403 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i [2022-11-03 03:44:56,464 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/data/8d350e3b7/91592249126f40bfb04c42a838f066f4/FLAG8e93365bd [2022-11-03 03:44:56,872 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/data/8d350e3b7/91592249126f40bfb04c42a838f066f4 [2022-11-03 03:44:56,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:44:56,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:44:56,885 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:44:56,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:44:56,889 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:44:56,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:56" (1/1) ... [2022-11-03 03:44:56,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661f1d4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:44:56, skipping insertion in model container [2022-11-03 03:44:56,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:44:56" (1/1) ... [2022-11-03 03:44:56,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:44:57,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:45:00,283 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i[348806,348819] [2022-11-03 03:45:00,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:00,626 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:45:01,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i[348806,348819] [2022-11-03 03:45:01,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:45:01,485 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:45:01,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01 WrapperNode [2022-11-03 03:45:01,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:45:01,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:01,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:45:01,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:45:01,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:01,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:01,883 INFO L138 Inliner]: procedures = 566, calls = 3591, calls flagged for inlining = 221, calls inlined = 180, statements flattened = 6315 [2022-11-03 03:45:01,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:45:01,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:45:01,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:45:01,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:45:01,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:01,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:01,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:01,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:02,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:02,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:02,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:02,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:02,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:45:02,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:45:02,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:45:02,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:45:02,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (1/1) ... [2022-11-03 03:45:02,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:45:02,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:02,282 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:45:02,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:45:02,340 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-03 03:45:02,341 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-03 03:45:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure bio_endio [2022-11-03 03:45:02,341 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_endio [2022-11-03 03:45:02,341 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2022-11-03 03:45:02,341 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2022-11-03 03:45:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_create [2022-11-03 03:45:02,342 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_create [2022-11-03 03:45:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 03:45:02,342 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 03:45:02,342 INFO L130 BoogieDeclarations]: Found specification of procedure __disable_intr [2022-11-03 03:45:02,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __disable_intr [2022-11-03 03:45:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_hw_buffers_init [2022-11-03 03:45:02,343 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_hw_buffers_init [2022-11-03 03:45:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_page [2022-11-03 03:45:02,343 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_page [2022-11-03 03:45:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure config_data_crc32 [2022-11-03 03:45:02,343 INFO L138 BoogieDeclarations]: Found implementation of procedure config_data_crc32 [2022-11-03 03:45:02,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:45:02,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:45:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_configure [2022-11-03 03:45:02,344 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_configure [2022-11-03 03:45:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-03 03:45:02,344 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-03 03:45:02,344 INFO L130 BoogieDeclarations]: Found specification of procedure creg_queue_cmd [2022-11-03 03:45:02,345 INFO L138 BoogieDeclarations]: Found implementation of procedure creg_queue_cmd [2022-11-03 03:45:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_cleanup_dma_queue [2022-11-03 03:45:02,345 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_cleanup_dma_queue [2022-11-03 03:45:02,345 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_free_dma [2022-11-03 03:45:02,346 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_free_dma [2022-11-03 03:45:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_3 [2022-11-03 03:45:02,346 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_3 [2022-11-03 03:45:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-03 03:45:02,346 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-03 03:45:02,346 INFO L130 BoogieDeclarations]: Found specification of procedure queue_flag_set_unlocked [2022-11-03 03:45:02,347 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_flag_set_unlocked [2022-11-03 03:45:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_cancel [2022-11-03 03:45:02,347 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_cancel [2022-11-03 03:45:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2022-11-03 03:45:02,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2022-11-03 03:45:02,347 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dev_cleanup [2022-11-03 03:45:02,347 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dev_cleanup [2022-11-03 03:45:02,348 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_get_card_state [2022-11-03 03:45:02,348 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_get_card_state [2022-11-03 03:45:02,348 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 03:45:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 03:45:02,349 INFO L130 BoogieDeclarations]: Found specification of procedure ssleep [2022-11-03 03:45:02,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ssleep [2022-11-03 03:45:02,350 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_cram_write [2022-11-03 03:45:02,350 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_cram_write [2022-11-03 03:45:02,351 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2022-11-03 03:45:02,351 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2022-11-03 03:45:02,351 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2022-11-03 03:45:02,352 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2022-11-03 03:45:02,352 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 03:45:02,352 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 03:45:02,352 INFO L130 BoogieDeclarations]: Found specification of procedure config_data_swab [2022-11-03 03:45:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure config_data_swab [2022-11-03 03:45:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:45:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_remove [2022-11-03 03:45:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_remove [2022-11-03 03:45:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_issue_card_cmd [2022-11-03 03:45:02,353 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_issue_card_cmd [2022-11-03 03:45:02,353 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2022-11-03 03:45:02,354 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2022-11-03 03:45:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-03 03:45:02,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-03 03:45:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-03 03:45:02,354 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-03 03:45:02,354 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_detach_dev [2022-11-03 03:45:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_detach_dev [2022-11-03 03:45:02,355 INFO L130 BoogieDeclarations]: Found specification of procedure CR_INTR_DMA [2022-11-03 03:45:02,355 INFO L138 BoogieDeclarations]: Found implementation of procedure CR_INTR_DMA [2022-11-03 03:45:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 03:45:02,356 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 03:45:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure push_tracker [2022-11-03 03:45:02,356 INFO L138 BoogieDeclarations]: Found implementation of procedure push_tracker [2022-11-03 03:45:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-03 03:45:02,356 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-03 03:45:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 03:45:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-03 03:45:02,357 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-03 03:45:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-03 03:45:02,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-03 03:45:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:45:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:45:02,358 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_6 [2022-11-03 03:45:02,358 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_6 [2022-11-03 03:45:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_trylock_reset_lock_of_NOT_ARG_SIGN [2022-11-03 03:45:02,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_trylock_reset_lock_of_NOT_ARG_SIGN [2022-11-03 03:45:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure CREG_DATA [2022-11-03 03:45:02,361 INFO L138 BoogieDeclarations]: Found implementation of procedure CREG_DATA [2022-11-03 03:45:02,361 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2022-11-03 03:45:02,361 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2022-11-03 03:45:02,361 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2022-11-03 03:45:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2022-11-03 03:45:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-03 03:45:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-03 03:45:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure pci_free_consistent [2022-11-03 03:45:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_free_consistent [2022-11-03 03:45:02,362 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc [2022-11-03 03:45:02,362 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_alloc [2022-11-03 03:45:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure card_event_handler [2022-11-03 03:45:02,363 INFO L138 BoogieDeclarations]: Found implementation of procedure card_event_handler [2022-11-03 03:45:02,363 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-03 03:45:02,363 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-03 03:45:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-03 03:45:02,364 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-03 03:45:02,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 03:45:02,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 03:45:02,365 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2022-11-03 03:45:02,367 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2022-11-03 03:45:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_creg_write [2022-11-03 03:45:02,368 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_creg_write [2022-11-03 03:45:02,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:45:02,370 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_6 [2022-11-03 03:45:02,370 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_6 [2022-11-03 03:45:02,371 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2022-11-03 03:45:02,371 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2022-11-03 03:45:02,371 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-11-03 03:45:02,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-11-03 03:45:02,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:45:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_6 [2022-11-03 03:45:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_6 [2022-11-03 03:45:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-03 03:45:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-03 03:45:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:45:02,377 INFO L130 BoogieDeclarations]: Found specification of procedure blk_cleanup_queue [2022-11-03 03:45:02,377 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_cleanup_queue [2022-11-03 03:45:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure dma_intr_coal_val [2022-11-03 03:45:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_intr_coal_val [2022-11-03 03:45:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-03 03:45:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-03 03:45:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_pci_remove [2022-11-03 03:45:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_pci_remove [2022-11-03 03:45:02,378 INFO L130 BoogieDeclarations]: Found specification of procedure __list_splice [2022-11-03 03:45:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_splice [2022-11-03 03:45:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-03 03:45:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-03 03:45:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-03 03:45:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-03 03:45:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-03 03:45:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-03 03:45:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_destroy [2022-11-03 03:45:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_destroy [2022-11-03 03:45:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_queue_reset [2022-11-03 03:45:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_queue_reset [2022-11-03 03:45:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure __issue_creg_rw [2022-11-03 03:45:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __issue_creg_rw [2022-11-03 03:45:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_dev_lock_of_rsxx_cardinfo [2022-11-03 03:45:02,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_dev_lock_of_rsxx_cardinfo [2022-11-03 03:45:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:45:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:45:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-03 03:45:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-03 03:45:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2022-11-03 03:45:02,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2022-11-03 03:45:02,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 03:45:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 03:45:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:45:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:45:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_creg_read [2022-11-03 03:45:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_creg_read [2022-11-03 03:45:02,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_reset_lock_of_NOT_ARG_SIGN [2022-11-03 03:45:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_reset_lock_of_NOT_ARG_SIGN [2022-11-03 03:45:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2022-11-03 03:45:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2022-11-03 03:45:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2022-11-03 03:45:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2022-11-03 03:45:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2022-11-03 03:45:02,383 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2022-11-03 03:45:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure pci_read_config_byte [2022-11-03 03:45:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_read_config_byte [2022-11-03 03:45:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_dev_lock_of_rsxx_cardinfo [2022-11-03 03:45:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_dev_lock_of_rsxx_cardinfo [2022-11-03 03:45:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_trylock [2022-11-03 03:45:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_trylock [2022-11-03 03:45:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_9 [2022-11-03 03:45:02,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_9 [2022-11-03 03:45:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 03:45:02,385 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 03:45:02,385 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:45:02,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:45:02,385 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2022-11-03 03:45:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2022-11-03 03:45:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_complete_dma [2022-11-03 03:45:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_complete_dma [2022-11-03 03:45:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-03 03:45:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-03 03:45:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:45:02,387 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:45:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:45:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:45:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR_OR_NULL [2022-11-03 03:45:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR_OR_NULL [2022-11-03 03:45:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure pci_alloc_consistent [2022-11-03 03:45:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_alloc_consistent [2022-11-03 03:45:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_eeh_failure [2022-11-03 03:45:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_eeh_failure [2022-11-03 03:45:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure card_shutdown [2022-11-03 03:45:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure card_shutdown [2022-11-03 03:45:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 03:45:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 03:45:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:45:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 03:45:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 03:45:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_master [2022-11-03 03:45:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_master [2022-11-03 03:45:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:45:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_reg_access [2022-11-03 03:45:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_reg_access [2022-11-03 03:45:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_3 [2022-11-03 03:45:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_3 [2022-11-03 03:45:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:45:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure creg_kick_queue [2022-11-03 03:45:02,391 INFO L138 BoogieDeclarations]: Found implementation of procedure creg_kick_queue [2022-11-03 03:45:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_3 [2022-11-03 03:45:02,391 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_3 [2022-11-03 03:45:02,391 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-03 03:45:02,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-03 03:45:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 03:45:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 03:45:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-03 03:45:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-03 03:45:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-03 03:45:02,392 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-03 03:45:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_dma_cleanup [2022-11-03 03:45:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_dma_cleanup [2022-11-03 03:45:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-03 03:45:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-03 03:45:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-03 03:45:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-03 03:45:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-03 03:45:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-03 03:45:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2022-11-03 03:45:02,394 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2022-11-03 03:45:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_6 [2022-11-03 03:45:02,395 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_6 [2022-11-03 03:45:02,398 INFO L130 BoogieDeclarations]: Found specification of procedure pci_dma_mapping_error [2022-11-03 03:45:02,398 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_dma_mapping_error [2022-11-03 03:45:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_pci_shutdown [2022-11-03 03:45:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_pci_shutdown [2022-11-03 03:45:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure issue_creg_rw [2022-11-03 03:45:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure issue_creg_rw [2022-11-03 03:45:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_card_state_to_str [2022-11-03 03:45:02,399 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_card_state_to_str [2022-11-03 03:45:02,399 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2022-11-03 03:45:02,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~VOID [2022-11-03 03:45:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_disable_ier [2022-11-03 03:45:02,401 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_disable_ier [2022-11-03 03:45:02,401 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:45:02,401 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:45:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_file [2022-11-03 03:45:02,402 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_file [2022-11-03 03:45:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:45:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-03 03:45:02,402 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-03 03:45:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2022-11-03 03:45:02,402 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2022-11-03 03:45:02,402 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_disable_ier_and_isr [2022-11-03 03:45:02,403 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_disable_ier_and_isr [2022-11-03 03:45:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-03 03:45:02,403 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-03 03:45:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:45:02,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:45:02,403 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_destroy [2022-11-03 03:45:02,403 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_destroy [2022-11-03 03:45:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure get_tracker_dma [2022-11-03 03:45:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure get_tracker_dma [2022-11-03 03:45:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 03:45:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 03:45:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-03 03:45:02,404 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-03 03:45:02,404 INFO L130 BoogieDeclarations]: Found specification of procedure creg_cmd_done [2022-11-03 03:45:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure creg_cmd_done [2022-11-03 03:45:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2022-11-03 03:45:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2022-11-03 03:45:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-03 03:45:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-03 03:45:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_enable_ier_and_isr [2022-11-03 03:45:02,405 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_enable_ier_and_isr [2022-11-03 03:45:02,405 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-03 03:45:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-03 03:45:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_get_card_size8 [2022-11-03 03:45:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_get_card_size8 [2022-11-03 03:45:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_resume_early_9 [2022-11-03 03:45:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_resume_early_9 [2022-11-03 03:45:02,406 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2022-11-03 03:45:02,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ffs [2022-11-03 03:45:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure rsxx_read_hw_log [2022-11-03 03:45:02,407 INFO L138 BoogieDeclarations]: Found implementation of procedure rsxx_read_hw_log [2022-11-03 03:45:02,407 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_3 [2022-11-03 03:45:02,488 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_3 [2022-11-03 03:45:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2022-11-03 03:45:02,489 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2022-11-03 03:45:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-03 03:45:02,489 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-03 03:45:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_free [2022-11-03 03:45:02,489 INFO L138 BoogieDeclarations]: Found implementation of procedure kmem_cache_free [2022-11-03 03:45:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 03:45:02,489 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 03:45:02,489 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_msi [2022-11-03 03:45:02,490 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_msi [2022-11-03 03:45:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_size [2022-11-03 03:45:02,490 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_size [2022-11-03 03:45:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure __enable_intr [2022-11-03 03:45:02,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __enable_intr [2022-11-03 03:45:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:45:02,490 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2022-11-03 03:45:02,490 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2022-11-03 03:45:03,442 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:45:03,446 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:45:03,536 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:45:14,568 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:45:16,116 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:45:16,116 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:45:16,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:16 BoogieIcfgContainer [2022-11-03 03:45:16,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:45:16,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:45:16,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:45:16,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:45:16,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:44:56" (1/3) ... [2022-11-03 03:45:16,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b3e9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:16, skipping insertion in model container [2022-11-03 03:45:16,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:45:01" (2/3) ... [2022-11-03 03:45:16,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b3e9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:45:16, skipping insertion in model container [2022-11-03 03:45:16,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:45:16" (3/3) ... [2022-11-03 03:45:16,134 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--block--rsxx--rsxx.ko-entry_point.cil.out.i [2022-11-03 03:45:16,158 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:45:16,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:45:16,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:45:16,287 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;@247b43bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:45:16,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:45:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 1763 states, 1064 states have (on average 1.324248120300752) internal successors, (1409), 1112 states have internal predecessors, (1409), 551 states have call successors, (551), 147 states have call predecessors, (551), 146 states have return successors, (540), 538 states have call predecessors, (540), 540 states have call successors, (540) [2022-11-03 03:45:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-03 03:45:16,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:16,341 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:16,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash 24630577, now seen corresponding path program 1 times [2022-11-03 03:45:16,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058392195] [2022-11-03 03:45:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:45:17,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058392195] [2022-11-03 03:45:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058392195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:17,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:17,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:17,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390108656] [2022-11-03 03:45:17,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:17,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:17,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:17,617 INFO L87 Difference]: Start difference. First operand has 1763 states, 1064 states have (on average 1.324248120300752) internal successors, (1409), 1112 states have internal predecessors, (1409), 551 states have call successors, (551), 147 states have call predecessors, (551), 146 states have return successors, (540), 538 states have call predecessors, (540), 540 states have call successors, (540) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 03:45:19,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:22,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:25,107 INFO L93 Difference]: Finished difference Result 4444 states and 6321 transitions. [2022-11-03 03:45:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:25,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 225 [2022-11-03 03:45:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:25,148 INFO L225 Difference]: With dead ends: 4444 [2022-11-03 03:45:25,148 INFO L226 Difference]: Without dead ends: 2689 [2022-11-03 03:45:25,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:25,165 INFO L413 NwaCegarLoop]: 2551 mSDtfsCounter, 1302 mSDsluCounter, 2430 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1304 SdHoareTripleChecker+Valid, 4716 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:25,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1304 Valid, 4716 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 609 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-03 03:45:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2022-11-03 03:45:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2673. [2022-11-03 03:45:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2673 states, 1650 states have (on average 1.3151515151515152) internal successors, (2170), 1695 states have internal predecessors, (2170), 779 states have call successors, (779), 244 states have call predecessors, (779), 243 states have return successors, (769), 765 states have call predecessors, (769), 769 states have call successors, (769) [2022-11-03 03:45:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2673 states to 2673 states and 3718 transitions. [2022-11-03 03:45:25,388 INFO L78 Accepts]: Start accepts. Automaton has 2673 states and 3718 transitions. Word has length 225 [2022-11-03 03:45:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:25,394 INFO L495 AbstractCegarLoop]: Abstraction has 2673 states and 3718 transitions. [2022-11-03 03:45:25,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 03:45:25,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2673 states and 3718 transitions. [2022-11-03 03:45:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-03 03:45:25,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:25,413 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:45:25,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:25,415 INFO L85 PathProgramCache]: Analyzing trace with hash -595734335, now seen corresponding path program 1 times [2022-11-03 03:45:25,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:25,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881181244] [2022-11-03 03:45:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:45:26,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:26,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881181244] [2022-11-03 03:45:26,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881181244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:26,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:26,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:26,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430318749] [2022-11-03 03:45:26,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:26,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:26,255 INFO L87 Difference]: Start difference. First operand 2673 states and 3718 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:28,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:30,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:32,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:32,728 INFO L93 Difference]: Finished difference Result 2890 states and 3978 transitions. [2022-11-03 03:45:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:32,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 232 [2022-11-03 03:45:32,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:32,750 INFO L225 Difference]: With dead ends: 2890 [2022-11-03 03:45:32,750 INFO L226 Difference]: Without dead ends: 2886 [2022-11-03 03:45:32,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:32,756 INFO L413 NwaCegarLoop]: 2313 mSDtfsCounter, 2256 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2258 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:32,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2258 Valid, 2646 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 03:45:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-11-03 03:45:32,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2884. [2022-11-03 03:45:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 1783 states have (on average 1.313516545148626) internal successors, (2342), 1829 states have internal predecessors, (2342), 819 states have call successors, (819), 282 states have call predecessors, (819), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-03 03:45:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 3972 transitions. [2022-11-03 03:45:32,913 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 3972 transitions. Word has length 232 [2022-11-03 03:45:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:32,916 INFO L495 AbstractCegarLoop]: Abstraction has 2884 states and 3972 transitions. [2022-11-03 03:45:32,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 3972 transitions. [2022-11-03 03:45:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-03 03:45:32,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:32,925 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:32,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:45:32,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:32,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1288745778, now seen corresponding path program 1 times [2022-11-03 03:45:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:32,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156972533] [2022-11-03 03:45:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:32,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:45:33,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:33,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156972533] [2022-11-03 03:45:33,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156972533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:33,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:33,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512430943] [2022-11-03 03:45:33,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:33,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:33,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:33,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:33,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:33,478 INFO L87 Difference]: Start difference. First operand 2884 states and 3972 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:36,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:38,138 INFO L93 Difference]: Finished difference Result 2888 states and 3974 transitions. [2022-11-03 03:45:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:38,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 233 [2022-11-03 03:45:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:38,157 INFO L225 Difference]: With dead ends: 2888 [2022-11-03 03:45:38,157 INFO L226 Difference]: Without dead ends: 2885 [2022-11-03 03:45:38,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:38,161 INFO L413 NwaCegarLoop]: 2312 mSDtfsCounter, 2282 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2284 SdHoareTripleChecker+Valid, 2623 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:38,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2284 Valid, 2623 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 348 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 03:45:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2022-11-03 03:45:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2883. [2022-11-03 03:45:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2883 states, 1783 states have (on average 1.3129556926528323) internal successors, (2341), 1828 states have internal predecessors, (2341), 818 states have call successors, (818), 282 states have call predecessors, (818), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-03 03:45:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2883 states to 2883 states and 3970 transitions. [2022-11-03 03:45:38,362 INFO L78 Accepts]: Start accepts. Automaton has 2883 states and 3970 transitions. Word has length 233 [2022-11-03 03:45:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:38,363 INFO L495 AbstractCegarLoop]: Abstraction has 2883 states and 3970 transitions. [2022-11-03 03:45:38,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2883 states and 3970 transitions. [2022-11-03 03:45:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-03 03:45:38,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:38,370 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:45:38,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:38,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1297259164, now seen corresponding path program 1 times [2022-11-03 03:45:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:38,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945802501] [2022-11-03 03:45:38,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:38,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:45:38,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945802501] [2022-11-03 03:45:38,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945802501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:38,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801673418] [2022-11-03 03:45:38,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:38,922 INFO L87 Difference]: Start difference. First operand 2883 states and 3970 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:40,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:43,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:45,061 INFO L93 Difference]: Finished difference Result 2887 states and 3972 transitions. [2022-11-03 03:45:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:45,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 234 [2022-11-03 03:45:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:45,087 INFO L225 Difference]: With dead ends: 2887 [2022-11-03 03:45:45,089 INFO L226 Difference]: Without dead ends: 2884 [2022-11-03 03:45:45,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:45,096 INFO L413 NwaCegarLoop]: 2310 mSDtfsCounter, 2279 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2281 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:45,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2281 Valid, 2621 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 347 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-11-03 03:45:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-11-03 03:45:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2882. [2022-11-03 03:45:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 1783 states have (on average 1.3123948401570387) internal successors, (2340), 1827 states have internal predecessors, (2340), 817 states have call successors, (817), 282 states have call predecessors, (817), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-03 03:45:45,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 3968 transitions. [2022-11-03 03:45:45,313 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 3968 transitions. Word has length 234 [2022-11-03 03:45:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:45,314 INFO L495 AbstractCegarLoop]: Abstraction has 2882 states and 3968 transitions. [2022-11-03 03:45:45,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:45,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 3968 transitions. [2022-11-03 03:45:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-03 03:45:45,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:45,320 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:45,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:45:45,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1561169263, now seen corresponding path program 1 times [2022-11-03 03:45:45,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:45,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170850844] [2022-11-03 03:45:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:45:45,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:45,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170850844] [2022-11-03 03:45:45,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170850844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:45,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:45,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:45,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282572650] [2022-11-03 03:45:45,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:45,814 INFO L87 Difference]: Start difference. First operand 2882 states and 3968 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:47,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:50,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:51,686 INFO L93 Difference]: Finished difference Result 2886 states and 3970 transitions. [2022-11-03 03:45:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:51,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 235 [2022-11-03 03:45:51,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:51,706 INFO L225 Difference]: With dead ends: 2886 [2022-11-03 03:45:51,706 INFO L226 Difference]: Without dead ends: 2883 [2022-11-03 03:45:51,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:51,710 INFO L413 NwaCegarLoop]: 2308 mSDtfsCounter, 2276 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2278 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:51,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2278 Valid, 2619 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 347 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 03:45:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-11-03 03:45:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2881. [2022-11-03 03:45:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 1783 states have (on average 1.311833987661245) internal successors, (2339), 1826 states have internal predecessors, (2339), 816 states have call successors, (816), 282 states have call predecessors, (816), 281 states have return successors, (811), 807 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-03 03:45:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 3966 transitions. [2022-11-03 03:45:51,892 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 3966 transitions. Word has length 235 [2022-11-03 03:45:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:51,893 INFO L495 AbstractCegarLoop]: Abstraction has 2881 states and 3966 transitions. [2022-11-03 03:45:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 3966 transitions. [2022-11-03 03:45:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-03 03:45:51,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:51,899 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:51,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:45:51,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1152442873, now seen corresponding path program 1 times [2022-11-03 03:45:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:51,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957603478] [2022-11-03 03:45:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:45:52,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957603478] [2022-11-03 03:45:52,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957603478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:52,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:52,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:52,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38651452] [2022-11-03 03:45:52,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:52,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:52,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:52,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:52,384 INFO L87 Difference]: Start difference. First operand 2881 states and 3966 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, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:45:54,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:56,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:00,138 INFO L93 Difference]: Finished difference Result 5440 states and 7627 transitions. [2022-11-03 03:46:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:00,139 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, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 236 [2022-11-03 03:46:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:00,170 INFO L225 Difference]: With dead ends: 5440 [2022-11-03 03:46:00,170 INFO L226 Difference]: Without dead ends: 5437 [2022-11-03 03:46:00,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:00,175 INFO L413 NwaCegarLoop]: 3395 mSDtfsCounter, 2324 mSDsluCounter, 2414 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 5539 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:00,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2324 Valid, 5539 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 681 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-03 03:46:00,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2022-11-03 03:46:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 5380. [2022-11-03 03:46:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5380 states, 3350 states have (on average 1.315820895522388) internal successors, (4408), 3416 states have internal predecessors, (4408), 1508 states have call successors, (1508), 510 states have call predecessors, (1508), 521 states have return successors, (1587), 1520 states have call predecessors, (1587), 1503 states have call successors, (1587) [2022-11-03 03:46:00,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5380 states to 5380 states and 7503 transitions. [2022-11-03 03:46:00,528 INFO L78 Accepts]: Start accepts. Automaton has 5380 states and 7503 transitions. Word has length 236 [2022-11-03 03:46:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:00,530 INFO L495 AbstractCegarLoop]: Abstraction has 5380 states and 7503 transitions. [2022-11-03 03:46:00,530 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, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:46:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 5380 states and 7503 transitions. [2022-11-03 03:46:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-03 03:46:00,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:00,536 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:00,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:46:00,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:00,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1366821804, now seen corresponding path program 1 times [2022-11-03 03:46:00,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:00,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823739197] [2022-11-03 03:46:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:00,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:46:00,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:00,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823739197] [2022-11-03 03:46:00,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823739197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:00,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:00,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756109924] [2022-11-03 03:46:00,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:00,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:00,927 INFO L87 Difference]: Start difference. First operand 5380 states and 7503 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:46:02,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:05,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:06,696 INFO L93 Difference]: Finished difference Result 5384 states and 7505 transitions. [2022-11-03 03:46:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 237 [2022-11-03 03:46:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:06,725 INFO L225 Difference]: With dead ends: 5384 [2022-11-03 03:46:06,725 INFO L226 Difference]: Without dead ends: 5369 [2022-11-03 03:46:06,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:06,730 INFO L413 NwaCegarLoop]: 2260 mSDtfsCounter, 2272 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:06,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2274 Valid, 2571 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 337 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 03:46:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5369 states. [2022-11-03 03:46:07,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5369 to 5367. [2022-11-03 03:46:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 3341 states have (on average 1.3151750972762646) internal successors, (4394), 3406 states have internal predecessors, (4394), 1504 states have call successors, (1504), 510 states have call predecessors, (1504), 521 states have return successors, (1584), 1517 states have call predecessors, (1584), 1500 states have call successors, (1584) [2022-11-03 03:46:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 7482 transitions. [2022-11-03 03:46:07,086 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 7482 transitions. Word has length 237 [2022-11-03 03:46:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:07,087 INFO L495 AbstractCegarLoop]: Abstraction has 5367 states and 7482 transitions. [2022-11-03 03:46:07,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-03 03:46:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 7482 transitions. [2022-11-03 03:46:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-03 03:46:07,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:07,094 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:07,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:46:07,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:07,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:07,095 INFO L85 PathProgramCache]: Analyzing trace with hash -899765645, now seen corresponding path program 1 times [2022-11-03 03:46:07,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:07,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333422317] [2022-11-03 03:46:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:07,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2022-11-03 03:46:07,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:07,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333422317] [2022-11-03 03:46:07,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333422317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:07,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:07,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:07,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374940059] [2022-11-03 03:46:07,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:07,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:07,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:07,624 INFO L87 Difference]: Start difference. First operand 5367 states and 7482 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 03:46:09,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:11,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:14,841 INFO L93 Difference]: Finished difference Result 15520 states and 21638 transitions. [2022-11-03 03:46:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:14,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 263 [2022-11-03 03:46:14,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:14,900 INFO L225 Difference]: With dead ends: 15520 [2022-11-03 03:46:14,901 INFO L226 Difference]: Without dead ends: 10192 [2022-11-03 03:46:14,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:14,927 INFO L413 NwaCegarLoop]: 2692 mSDtfsCounter, 2185 mSDsluCounter, 2430 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 4851 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:14,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2187 Valid, 4851 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 573 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 03:46:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10192 states. [2022-11-03 03:46:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10192 to 10176. [2022-11-03 03:46:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 6334 states have (on average 1.3167035048942217) internal successors, (8340), 6466 states have internal predecessors, (8340), 2852 states have call successors, (2852), 968 states have call predecessors, (2852), 989 states have return successors, (3003), 2872 states have call predecessors, (3003), 2848 states have call successors, (3003) [2022-11-03 03:46:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 14195 transitions. [2022-11-03 03:46:15,716 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 14195 transitions. Word has length 263 [2022-11-03 03:46:15,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:15,717 INFO L495 AbstractCegarLoop]: Abstraction has 10176 states and 14195 transitions. [2022-11-03 03:46:15,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-03 03:46:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 14195 transitions. [2022-11-03 03:46:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-03 03:46:15,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:15,724 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:15,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:46:15,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:15,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:15,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1498063396, now seen corresponding path program 1 times [2022-11-03 03:46:15,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:15,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519732751] [2022-11-03 03:46:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2022-11-03 03:46:17,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519732751] [2022-11-03 03:46:17,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519732751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:17,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:17,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:17,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131593317] [2022-11-03 03:46:17,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:17,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:17,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:17,439 INFO L87 Difference]: Start difference. First operand 10176 states and 14195 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 03:46:19,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:21,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:25,200 INFO L93 Difference]: Finished difference Result 15295 states and 21618 transitions. [2022-11-03 03:46:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 271 [2022-11-03 03:46:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:25,285 INFO L225 Difference]: With dead ends: 15295 [2022-11-03 03:46:25,285 INFO L226 Difference]: Without dead ends: 15276 [2022-11-03 03:46:25,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:25,295 INFO L413 NwaCegarLoop]: 2950 mSDtfsCounter, 2329 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2329 SdHoareTripleChecker+Valid, 5095 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:25,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2329 Valid, 5095 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 598 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-11-03 03:46:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15276 states. [2022-11-03 03:46:26,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15276 to 15273. [2022-11-03 03:46:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15273 states, 9499 states have (on average 1.3160332666596484) internal successors, (12501), 9706 states have internal predecessors, (12501), 4289 states have call successors, (4289), 1464 states have call predecessors, (4289), 1484 states have return successors, (4793), 4298 states have call predecessors, (4793), 4285 states have call successors, (4793) [2022-11-03 03:46:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15273 states to 15273 states and 21583 transitions. [2022-11-03 03:46:26,404 INFO L78 Accepts]: Start accepts. Automaton has 15273 states and 21583 transitions. Word has length 271 [2022-11-03 03:46:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:26,405 INFO L495 AbstractCegarLoop]: Abstraction has 15273 states and 21583 transitions. [2022-11-03 03:46:26,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 03:46:26,405 INFO L276 IsEmpty]: Start isEmpty. Operand 15273 states and 21583 transitions. [2022-11-03 03:46:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-11-03 03:46:26,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:26,415 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-03 03:46:26,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:46:26,415 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:26,416 INFO L85 PathProgramCache]: Analyzing trace with hash -740049437, now seen corresponding path program 1 times [2022-11-03 03:46:26,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:26,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461099721] [2022-11-03 03:46:26,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:26,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-11-03 03:46:26,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461099721] [2022-11-03 03:46:26,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461099721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:26,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:46:26,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:46:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517632114] [2022-11-03 03:46:26,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:46:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:46:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:26,834 INFO L87 Difference]: Start difference. First operand 15273 states and 21583 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 03:46:28,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:31,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:34,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:34,505 INFO L93 Difference]: Finished difference Result 33153 states and 46703 transitions. [2022-11-03 03:46:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:34,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 298 [2022-11-03 03:46:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:34,599 INFO L225 Difference]: With dead ends: 33153 [2022-11-03 03:46:34,600 INFO L226 Difference]: Without dead ends: 17919 [2022-11-03 03:46:34,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:34,674 INFO L413 NwaCegarLoop]: 3206 mSDtfsCounter, 2275 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2277 SdHoareTripleChecker+Valid, 4398 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:34,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2277 Valid, 4398 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 576 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-11-03 03:46:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17919 states. [2022-11-03 03:46:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17919 to 17861. [2022-11-03 03:46:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17861 states, 11150 states have (on average 1.3154260089686098) internal successors, (14667), 11385 states have internal predecessors, (14667), 4936 states have call successors, (4936), 1750 states have call predecessors, (4936), 1774 states have return successors, (5500), 4942 states have call predecessors, (5500), 4932 states have call successors, (5500) [2022-11-03 03:46:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17861 states to 17861 states and 25103 transitions. [2022-11-03 03:46:36,153 INFO L78 Accepts]: Start accepts. Automaton has 17861 states and 25103 transitions. Word has length 298 [2022-11-03 03:46:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:36,153 INFO L495 AbstractCegarLoop]: Abstraction has 17861 states and 25103 transitions. [2022-11-03 03:46:36,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-03 03:46:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 17861 states and 25103 transitions. [2022-11-03 03:46:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-11-03 03:46:36,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:36,164 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:36,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:46:36,164 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:36,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1403936262, now seen corresponding path program 1 times [2022-11-03 03:46:36,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:36,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264135800] [2022-11-03 03:46:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:36,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2022-11-03 03:46:40,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264135800] [2022-11-03 03:46:40,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264135800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:46:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20089241] [2022-11-03 03:46:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:40,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:40,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:40,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:40,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:46:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 6579 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:46:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-03 03:46:42,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:42,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20089241] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:42,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:46:42,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-03 03:46:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537165812] [2022-11-03 03:46:42,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:42,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:46:42,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:42,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:46:42,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:46:42,429 INFO L87 Difference]: Start difference. First operand 17861 states and 25103 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 03:46:44,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:47,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:51,906 INFO L93 Difference]: Finished difference Result 35708 states and 51057 transitions. [2022-11-03 03:46:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:46:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) Word has length 310 [2022-11-03 03:46:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:51,996 INFO L225 Difference]: With dead ends: 35708 [2022-11-03 03:46:51,996 INFO L226 Difference]: Without dead ends: 17903 [2022-11-03 03:46:52,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:46:52,064 INFO L413 NwaCegarLoop]: 2168 mSDtfsCounter, 2 mSDsluCounter, 7318 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8662 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:52,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8662 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1116 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2022-11-03 03:46:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17903 states. [2022-11-03 03:46:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17903 to 17871. [2022-11-03 03:46:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17871 states, 11157 states have (on average 1.315228107914314) internal successors, (14674), 11393 states have internal predecessors, (14674), 4936 states have call successors, (4936), 1750 states have call predecessors, (4936), 1777 states have return successors, (5513), 4944 states have call predecessors, (5513), 4932 states have call successors, (5513) [2022-11-03 03:46:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17871 states to 17871 states and 25123 transitions. [2022-11-03 03:46:53,273 INFO L78 Accepts]: Start accepts. Automaton has 17871 states and 25123 transitions. Word has length 310 [2022-11-03 03:46:53,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:53,274 INFO L495 AbstractCegarLoop]: Abstraction has 17871 states and 25123 transitions. [2022-11-03 03:46:53,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 03:46:53,274 INFO L276 IsEmpty]: Start isEmpty. Operand 17871 states and 25123 transitions. [2022-11-03 03:46:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-11-03 03:46:53,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:53,284 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:53,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:53,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:53,500 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:53,501 INFO L85 PathProgramCache]: Analyzing trace with hash -488031274, now seen corresponding path program 1 times [2022-11-03 03:46:53,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:53,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105294460] [2022-11-03 03:46:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:53,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-11-03 03:46:56,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:56,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105294460] [2022-11-03 03:46:56,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105294460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:46:56,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383943733] [2022-11-03 03:46:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:56,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:56,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:56,975 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:56,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:46:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:59,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 6587 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:46:59,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2022-11-03 03:46:59,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:46:59,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383943733] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:46:59,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:46:59,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2022-11-03 03:46:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569564988] [2022-11-03 03:46:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:46:59,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:46:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:46:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:46:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:46:59,188 INFO L87 Difference]: Start difference. First operand 17871 states and 25123 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 03:47:01,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:03,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:08,234 INFO L93 Difference]: Finished difference Result 35728 states and 51097 transitions. [2022-11-03 03:47:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:47:08,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) Word has length 312 [2022-11-03 03:47:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:08,319 INFO L225 Difference]: With dead ends: 35728 [2022-11-03 03:47:08,320 INFO L226 Difference]: Without dead ends: 17913 [2022-11-03 03:47:08,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:47:08,384 INFO L413 NwaCegarLoop]: 2168 mSDtfsCounter, 2 mSDsluCounter, 7318 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8662 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:08,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8662 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1114 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-11-03 03:47:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17913 states. [2022-11-03 03:47:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17913 to 17871. [2022-11-03 03:47:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17871 states, 11157 states have (on average 1.315228107914314) internal successors, (14674), 11393 states have internal predecessors, (14674), 4936 states have call successors, (4936), 1750 states have call predecessors, (4936), 1777 states have return successors, (5513), 4944 states have call predecessors, (5513), 4932 states have call successors, (5513) [2022-11-03 03:47:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17871 states to 17871 states and 25123 transitions. [2022-11-03 03:47:09,724 INFO L78 Accepts]: Start accepts. Automaton has 17871 states and 25123 transitions. Word has length 312 [2022-11-03 03:47:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:09,725 INFO L495 AbstractCegarLoop]: Abstraction has 17871 states and 25123 transitions. [2022-11-03 03:47:09,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (43), 2 states have call predecessors, (43), 3 states have return successors, (37), 3 states have call predecessors, (37), 2 states have call successors, (37) [2022-11-03 03:47:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 17871 states and 25123 transitions. [2022-11-03 03:47:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2022-11-03 03:47:09,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:09,745 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:09,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:47:09,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:47:09,965 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:09,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1854717845, now seen corresponding path program 1 times [2022-11-03 03:47:09,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:09,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416210883] [2022-11-03 03:47:09,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:09,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2022-11-03 03:47:11,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:11,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416210883] [2022-11-03 03:47:11,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416210883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:11,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:11,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:47:11,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905406974] [2022-11-03 03:47:11,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:11,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:47:11,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:11,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:47:11,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:11,487 INFO L87 Difference]: Start difference. First operand 17871 states and 25123 transitions. Second operand has 6 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-03 03:47:14,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:16,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:19,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:23,761 INFO L93 Difference]: Finished difference Result 17989 states and 25273 transitions. [2022-11-03 03:47:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:47:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) Word has length 372 [2022-11-03 03:47:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:23,838 INFO L225 Difference]: With dead ends: 17989 [2022-11-03 03:47:23,838 INFO L226 Difference]: Without dead ends: 17986 [2022-11-03 03:47:23,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:47:23,852 INFO L413 NwaCegarLoop]: 2366 mSDtfsCounter, 903 mSDsluCounter, 7101 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 365 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 8654 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:23,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 8654 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1162 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2022-11-03 03:47:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17986 states. [2022-11-03 03:47:24,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17986 to 17982. [2022-11-03 03:47:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17982 states, 11225 states have (on average 1.3149220489977729) internal successors, (14760), 11461 states have internal predecessors, (14760), 4960 states have call successors, (4960), 1769 states have call predecessors, (4960), 1796 states have return successors, (5537), 4969 states have call predecessors, (5537), 4957 states have call successors, (5537) [2022-11-03 03:47:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17982 states to 17982 states and 25257 transitions. [2022-11-03 03:47:24,931 INFO L78 Accepts]: Start accepts. Automaton has 17982 states and 25257 transitions. Word has length 372 [2022-11-03 03:47:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:24,932 INFO L495 AbstractCegarLoop]: Abstraction has 17982 states and 25257 transitions. [2022-11-03 03:47:24,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (60), 3 states have call predecessors, (60), 2 states have return successors, (53), 3 states have call predecessors, (53), 2 states have call successors, (53) [2022-11-03 03:47:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17982 states and 25257 transitions. [2022-11-03 03:47:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-03 03:47:24,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:24,954 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:24,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:47:24,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:24,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash 885118685, now seen corresponding path program 1 times [2022-11-03 03:47:24,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:24,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96985947] [2022-11-03 03:47:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:24,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2022-11-03 03:47:25,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:25,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96985947] [2022-11-03 03:47:25,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96985947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:25,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:25,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:25,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120585212] [2022-11-03 03:47:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:25,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:25,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:25,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:25,501 INFO L87 Difference]: Start difference. First operand 17982 states and 25257 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-03 03:47:27,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:29,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:34,047 INFO L93 Difference]: Finished difference Result 49937 states and 70269 transitions. [2022-11-03 03:47:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:34,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) Word has length 383 [2022-11-03 03:47:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:34,332 INFO L225 Difference]: With dead ends: 49937 [2022-11-03 03:47:34,332 INFO L226 Difference]: Without dead ends: 32011 [2022-11-03 03:47:34,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:34,387 INFO L413 NwaCegarLoop]: 3411 mSDtfsCounter, 2202 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 5573 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:34,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2203 Valid, 5573 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 695 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 03:47:34,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32011 states. [2022-11-03 03:47:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32011 to 31992. [2022-11-03 03:47:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31992 states, 19919 states have (on average 1.3148250414177418) internal successors, (26190), 20366 states have internal predecessors, (26190), 8920 states have call successors, (8920), 3104 states have call predecessors, (8920), 3152 states have return successors, (9943), 8931 states have call predecessors, (9943), 8917 states have call successors, (9943) [2022-11-03 03:47:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31992 states to 31992 states and 45053 transitions. [2022-11-03 03:47:36,372 INFO L78 Accepts]: Start accepts. Automaton has 31992 states and 45053 transitions. Word has length 383 [2022-11-03 03:47:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:36,373 INFO L495 AbstractCegarLoop]: Abstraction has 31992 states and 45053 transitions. [2022-11-03 03:47:36,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 2 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (47), 2 states have call predecessors, (47), 2 states have call successors, (47) [2022-11-03 03:47:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 31992 states and 45053 transitions. [2022-11-03 03:47:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-11-03 03:47:36,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:36,398 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 10, 10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 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] [2022-11-03 03:47:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 03:47:36,399 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2039002772, now seen corresponding path program 1 times [2022-11-03 03:47:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003396453] [2022-11-03 03:47:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-11-03 03:47:37,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:37,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003396453] [2022-11-03 03:47:37,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003396453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:37,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:47:37,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:47:37,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378591286] [2022-11-03 03:47:37,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:37,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:37,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:37,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:37,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:37,086 INFO L87 Difference]: Start difference. First operand 31992 states and 45053 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-03 03:47:39,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:41,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:47:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:47:46,200 INFO L93 Difference]: Finished difference Result 73884 states and 103779 transitions. [2022-11-03 03:47:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:47:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 388 [2022-11-03 03:47:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:47:46,331 INFO L225 Difference]: With dead ends: 73884 [2022-11-03 03:47:46,331 INFO L226 Difference]: Without dead ends: 44331 [2022-11-03 03:47:46,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:47:46,406 INFO L413 NwaCegarLoop]: 3420 mSDtfsCounter, 1970 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 21 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1972 SdHoareTripleChecker+Valid, 5083 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:47:46,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1972 Valid, 5083 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 696 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 03:47:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44331 states. [2022-11-03 03:47:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44331 to 44319. [2022-11-03 03:47:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44319 states, 27772 states have (on average 1.314237361371165) internal successors, (36499), 28398 states have internal predecessors, (36499), 12023 states have call successors, (12023), 4451 states have call predecessors, (12023), 4523 states have return successors, (13338), 12035 states have call predecessors, (13338), 12020 states have call successors, (13338) [2022-11-03 03:47:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44319 states to 44319 states and 61860 transitions. [2022-11-03 03:47:49,373 INFO L78 Accepts]: Start accepts. Automaton has 44319 states and 61860 transitions. Word has length 388 [2022-11-03 03:47:49,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:47:49,375 INFO L495 AbstractCegarLoop]: Abstraction has 44319 states and 61860 transitions. [2022-11-03 03:47:49,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-03 03:47:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 44319 states and 61860 transitions. [2022-11-03 03:47:49,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2022-11-03 03:47:49,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:47:49,404 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:47:49,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 03:47:49,404 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:47:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:47:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash 708133309, now seen corresponding path program 1 times [2022-11-03 03:47:49,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:47:49,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778381745] [2022-11-03 03:47:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:49,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:47:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2022-11-03 03:47:53,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:47:53,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778381745] [2022-11-03 03:47:53,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778381745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:47:53,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725902312] [2022-11-03 03:47:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:47:53,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:47:53,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:47:53,813 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:47:53,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:47:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:47:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 7559 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:47:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:47:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-11-03 03:47:56,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:47:56,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725902312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:47:56,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:47:56,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 03:47:56,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259415985] [2022-11-03 03:47:56,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:47:56,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:47:56,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:47:56,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:47:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:47:56,399 INFO L87 Difference]: Start difference. First operand 44319 states and 61860 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (63), 3 states have call predecessors, (63), 3 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2022-11-03 03:47:58,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:48:00,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:48:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:04,423 INFO L93 Difference]: Finished difference Result 88504 states and 123451 transitions. [2022-11-03 03:48:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (63), 3 states have call predecessors, (63), 3 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 445 [2022-11-03 03:48:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:04,654 INFO L225 Difference]: With dead ends: 88504 [2022-11-03 03:48:04,655 INFO L226 Difference]: Without dead ends: 44241 [2022-11-03 03:48:04,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:04,901 INFO L413 NwaCegarLoop]: 2173 mSDtfsCounter, 2306 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2306 SdHoareTripleChecker+Valid, 2239 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:04,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2306 Valid, 2239 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 03:48:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44241 states. [2022-11-03 03:48:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44241 to 44241. [2022-11-03 03:48:07,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44241 states, 27733 states have (on average 1.3132729960696643) internal successors, (36421), 28359 states have internal predecessors, (36421), 11984 states have call successors, (11984), 4451 states have call predecessors, (11984), 4523 states have return successors, (13221), 11996 states have call predecessors, (13221), 11981 states have call successors, (13221) [2022-11-03 03:48:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44241 states to 44241 states and 61626 transitions. [2022-11-03 03:48:08,117 INFO L78 Accepts]: Start accepts. Automaton has 44241 states and 61626 transitions. Word has length 445 [2022-11-03 03:48:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:08,118 INFO L495 AbstractCegarLoop]: Abstraction has 44241 states and 61626 transitions. [2022-11-03 03:48:08,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 3 states have call successors, (63), 3 states have call predecessors, (63), 3 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2022-11-03 03:48:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 44241 states and 61626 transitions. [2022-11-03 03:48:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-11-03 03:48:08,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:08,134 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:08,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:48:08,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:08,349 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1017664662, now seen corresponding path program 1 times [2022-11-03 03:48:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:08,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710217809] [2022-11-03 03:48:08,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-03 03:48:10,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:10,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710217809] [2022-11-03 03:48:10,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710217809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:10,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434938632] [2022-11-03 03:48:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:10,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:10,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:10,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:10,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:48:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 6114 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-03 03:48:12,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:12,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434938632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:12,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:12,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 03:48:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228054254] [2022-11-03 03:48:12,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:12,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:12,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:12,406 INFO L87 Difference]: Start difference. First operand 44241 states and 61626 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 03:48:14,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:48:16,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:48:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:21,110 INFO L93 Difference]: Finished difference Result 88350 states and 122984 transitions. [2022-11-03 03:48:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:21,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 369 [2022-11-03 03:48:21,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:21,271 INFO L225 Difference]: With dead ends: 88350 [2022-11-03 03:48:21,271 INFO L226 Difference]: Without dead ends: 44165 [2022-11-03 03:48:21,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:21,372 INFO L413 NwaCegarLoop]: 2301 mSDtfsCounter, 2258 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2260 SdHoareTripleChecker+Valid, 2676 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:21,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2260 Valid, 2676 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 360 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 03:48:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44165 states. [2022-11-03 03:48:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44165 to 44163. [2022-11-03 03:48:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44163 states, 27694 states have (on average 1.3123059146385498) internal successors, (36343), 28320 states have internal predecessors, (36343), 11945 states have call successors, (11945), 4451 states have call predecessors, (11945), 4523 states have return successors, (13104), 11957 states have call predecessors, (13104), 11942 states have call successors, (13104) [2022-11-03 03:48:24,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44163 states to 44163 states and 61392 transitions. [2022-11-03 03:48:24,181 INFO L78 Accepts]: Start accepts. Automaton has 44163 states and 61392 transitions. Word has length 369 [2022-11-03 03:48:24,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:48:24,182 INFO L495 AbstractCegarLoop]: Abstraction has 44163 states and 61392 transitions. [2022-11-03 03:48:24,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 03:48:24,182 INFO L276 IsEmpty]: Start isEmpty. Operand 44163 states and 61392 transitions. [2022-11-03 03:48:24,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-11-03 03:48:24,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:48:24,388 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:48:24,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-03 03:48:24,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 03:48:24,601 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:48:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:48:24,601 INFO L85 PathProgramCache]: Analyzing trace with hash 339614057, now seen corresponding path program 1 times [2022-11-03 03:48:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:48:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059964666] [2022-11-03 03:48:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:24,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:48:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-03 03:48:26,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:48:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059964666] [2022-11-03 03:48:26,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059964666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:48:26,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968151699] [2022-11-03 03:48:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:48:26,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:48:26,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:48:26,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:48:26,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1495ac12-41ca-4a84-ad55-021aa2885ae2/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:48:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:48:28,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 6110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:48:28,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:48:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-03 03:48:28,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:48:28,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968151699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:48:28,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:48:28,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-03 03:48:28,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740363708] [2022-11-03 03:48:28,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:48:28,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:48:28,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:48:28,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:48:28,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:28,830 INFO L87 Difference]: Start difference. First operand 44163 states and 61392 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) [2022-11-03 03:48:29,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:48:32,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:48:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:48:36,479 INFO L93 Difference]: Finished difference Result 88194 states and 122516 transitions. [2022-11-03 03:48:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:48:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 2 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (49), 2 states have call predecessors, (49), 2 states have call successors, (49) Word has length 367 [2022-11-03 03:48:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:48:36,629 INFO L225 Difference]: With dead ends: 88194 [2022-11-03 03:48:36,629 INFO L226 Difference]: Without dead ends: 44087 [2022-11-03 03:48:36,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 03:48:36,901 INFO L413 NwaCegarLoop]: 2286 mSDtfsCounter, 2312 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:48:36,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2314 Valid, 2595 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 03:48:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44087 states.