./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:54:48,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:54:48,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:54:48,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:54:48,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:54:48,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:54:48,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:54:48,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:54:48,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:54:48,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:54:48,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:54:48,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:54:48,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:54:48,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:54:48,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:54:48,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:54:48,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:54:48,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:54:48,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:54:48,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:54:48,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:54:48,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:54:48,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:54:48,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:54:48,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:54:48,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:54:48,725 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:54:48,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:54:48,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:54:48,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:54:48,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:54:48,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:54:48,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:54:48,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:54:48,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:54:48,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:54:48,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:54:48,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:54:48,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:54:48,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:54:48,739 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:54:48,740 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:54:48,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:54:48,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:54:48,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:54:48,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:54:48,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:54:48,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:54:48,771 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:54:48,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:54:48,772 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:54:48,772 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:54:48,772 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:54:48,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:54:48,773 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:54:48,773 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:54:48,773 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:54:48,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:54:48,774 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:54:48,774 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:54:48,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:54:48,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:54:48,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:54:48,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:54:48,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:54:48,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:54:48,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:54:48,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:54:48,776 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:54:48,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:54:48,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:54:48,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:48,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:54:48,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:54:48,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:54:48,778 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:54:48,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:54:48,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:54:48,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:54:48,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:54:48,779 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc [2021-11-25 18:54:49,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:54:49,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:54:49,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:54:49,070 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:54:49,071 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:54:49,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2021-11-25 18:54:49,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/data/154f29b10/59c7ca56af354e5e906db853391a395c/FLAG15ecf9421 [2021-11-25 18:54:49,941 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:54:49,942 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2021-11-25 18:54:49,980 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/data/154f29b10/59c7ca56af354e5e906db853391a395c/FLAG15ecf9421 [2021-11-25 18:54:50,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/data/154f29b10/59c7ca56af354e5e906db853391a395c [2021-11-25 18:54:50,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:54:50,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:54:50,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:50,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:54:50,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:54:50,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:50" (1/1) ... [2021-11-25 18:54:50,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f3e88e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:50, skipping insertion in model container [2021-11-25 18:54:50,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:50" (1/1) ... [2021-11-25 18:54:50,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:54:50,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:54:51,643 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_d7002ef5-7794-43fe-bf8b-10294bef18d1/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2021-11-25 18:54:51,775 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:51,815 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:54:51,991 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_d7002ef5-7794-43fe-bf8b-10294bef18d1/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2021-11-25 18:54:52,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:52,124 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:54:52,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52 WrapperNode [2021-11-25 18:54:52,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:52,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:52,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:54:52,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:54:52,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,323 INFO L137 Inliner]: procedures = 196, calls = 979, calls flagged for inlining = 91, calls inlined = 82, statements flattened = 2523 [2021-11-25 18:54:52,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:52,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:54:52,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:54:52,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:54:52,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:54:52,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:54:52,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:54:52,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:54:52,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (1/1) ... [2021-11-25 18:54:52,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:52,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:52,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:54:52,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:54:52,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:54:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_exit [2021-11-25 18:54:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_exit [2021-11-25 18:54:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-25 18:54:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-25 18:54:52,628 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:54:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:54:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_report [2021-11-25 18:54:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_report [2021-11-25 18:54:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2021-11-25 18:54:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2021-11-25 18:54:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 18:54:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 18:54:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 18:54:52,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 18:54:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-25 18:54:52,631 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-25 18:54:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_rfk_state [2021-11-25 18:54:52,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_rfk_state [2021-11-25 18:54:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:54:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:54:52,632 INFO L130 BoogieDeclarations]: Found specification of procedure read_ec_data [2021-11-25 18:54:52,632 INFO L138 BoogieDeclarations]: Found implementation of procedure read_ec_data [2021-11-25 18:54:52,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:54:52,632 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-25 18:54:52,632 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-25 18:54:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_touchpad_state [2021-11-25 18:54:52,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_touchpad_state [2021-11-25 18:54:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:54:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 18:54:52,633 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 18:54:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_init [2021-11-25 18:54:52,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_init [2021-11-25 18:54:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure acpi_evaluate_integer [2021-11-25 18:54:52,634 INFO L138 BoogieDeclarations]: Found implementation of procedure acpi_evaluate_integer [2021-11-25 18:54:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-25 18:54:52,634 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-25 18:54:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_notify [2021-11-25 18:54:52,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_notify [2021-11-25 18:54:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-25 18:54:52,635 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-25 18:54:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:54:52,635 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_destroy [2021-11-25 18:54:52,635 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_destroy [2021-11-25 18:54:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:54:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure backlight_update_status [2021-11-25 18:54:52,636 INFO L138 BoogieDeclarations]: Found implementation of procedure backlight_update_status [2021-11-25 18:54:52,636 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2021-11-25 18:54:52,637 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2021-11-25 18:54:52,637 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_add [2021-11-25 18:54:52,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_add [2021-11-25 18:54:52,639 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_update_status [2021-11-25 18:54:52,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_update_status [2021-11-25 18:54:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 18:54:52,640 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 18:54:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_init_sw_state [2021-11-25 18:54:52,641 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_init_sw_state [2021-11-25 18:54:52,641 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 18:54:52,641 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 18:54:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_file [2021-11-25 18:54:52,642 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_file [2021-11-25 18:54:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:54:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-25 18:54:52,642 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2021-11-25 18:54:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_get_brightness [2021-11-25 18:54:52,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_get_brightness [2021-11-25 18:54:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_unregister_rfkill [2021-11-25 18:54:52,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_unregister_rfkill [2021-11-25 18:54:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:54:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2021-11-25 18:54:52,643 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2021-11-25 18:54:52,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:54:52,644 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcr [2021-11-25 18:54:52,644 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcr [2021-11-25 18:54:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcw [2021-11-25 18:54:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcw [2021-11-25 18:54:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure sparse_keymap_free [2021-11-25 18:54:52,645 INFO L138 BoogieDeclarations]: Found implementation of procedure sparse_keymap_free [2021-11-25 18:54:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:54:52,645 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-25 18:54:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-25 18:54:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_resume [2021-11-25 18:54:52,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_resume [2021-11-25 18:54:52,646 INFO L130 BoogieDeclarations]: Found specification of procedure write_ec_cmd [2021-11-25 18:54:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure write_ec_cmd [2021-11-25 18:54:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_platform_exit [2021-11-25 18:54:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_platform_exit [2021-11-25 18:54:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_debugfs_exit [2021-11-25 18:54:52,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_debugfs_exit [2021-11-25 18:54:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:54:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:54:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:54:53,188 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:54:53,192 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:55:04,406 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:55:05,566 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:55:05,566 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:55:05,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:55:05 BoogieIcfgContainer [2021-11-25 18:55:05,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:55:05,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:55:05,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:55:05,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:55:05,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:54:50" (1/3) ... [2021-11-25 18:55:05,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9c3adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:55:05, skipping insertion in model container [2021-11-25 18:55:05,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:52" (2/3) ... [2021-11-25 18:55:05,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9c3adc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:55:05, skipping insertion in model container [2021-11-25 18:55:05,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:55:05" (3/3) ... [2021-11-25 18:55:05,585 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2021-11-25 18:55:05,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:55:05,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:55:05,663 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:55:05,675 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:55:05,678 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:55:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2021-11-25 18:55:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:55:05,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:05,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:05,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1614419724, now seen corresponding path program 1 times [2021-11-25 18:55:05,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:05,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144204886] [2021-11-25 18:55:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:05,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:06,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144204886] [2021-11-25 18:55:06,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144204886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:06,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:06,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:55:06,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096812611] [2021-11-25 18:55:06,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:06,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:06,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:06,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:06,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:06,578 INFO L87 Difference]: Start difference. First operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:08,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:09,378 INFO L93 Difference]: Finished difference Result 1401 states and 2081 transitions. [2021-11-25 18:55:09,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:09,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 18:55:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:09,406 INFO L225 Difference]: With dead ends: 1401 [2021-11-25 18:55:09,407 INFO L226 Difference]: Without dead ends: 927 [2021-11-25 18:55:09,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:09,420 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 655 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:09,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1289 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 18:55:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-11-25 18:55:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2021-11-25 18:55:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 621 states have (on average 1.4669887278582932) internal successors, (911), 649 states have internal predecessors, (911), 225 states have call successors, (225), 77 states have call predecessors, (225), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-25 18:55:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1354 transitions. [2021-11-25 18:55:09,556 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1354 transitions. Word has length 18 [2021-11-25 18:55:09,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:09,556 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1354 transitions. [2021-11-25 18:55:09,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1354 transitions. [2021-11-25 18:55:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:55:09,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:09,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:09,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:55:09,562 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:09,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:09,562 INFO L85 PathProgramCache]: Analyzing trace with hash 230421843, now seen corresponding path program 1 times [2021-11-25 18:55:09,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:09,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344829276] [2021-11-25 18:55:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:09,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:09,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344829276] [2021-11-25 18:55:09,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344829276] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:09,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:09,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:55:09,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97406971] [2021-11-25 18:55:09,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:09,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:09,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:09,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:09,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:09,833 INFO L87 Difference]: Start difference. First operand 923 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:11,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:12,265 INFO L93 Difference]: Finished difference Result 925 states and 1355 transitions. [2021-11-25 18:55:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 18:55:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:12,275 INFO L225 Difference]: With dead ends: 925 [2021-11-25 18:55:12,275 INFO L226 Difference]: Without dead ends: 922 [2021-11-25 18:55:12,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:12,278 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 670 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:12,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 589 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:55:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-11-25 18:55:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2021-11-25 18:55:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 621 states have (on average 1.465378421900161) internal successors, (910), 648 states have internal predecessors, (910), 224 states have call successors, (224), 77 states have call predecessors, (224), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-25 18:55:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1352 transitions. [2021-11-25 18:55:12,344 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1352 transitions. Word has length 20 [2021-11-25 18:55:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:12,345 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1352 transitions. [2021-11-25 18:55:12,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1352 transitions. [2021-11-25 18:55:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 18:55:12,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:12,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:12,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:55:12,349 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:12,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1447111222, now seen corresponding path program 1 times [2021-11-25 18:55:12,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:12,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189039384] [2021-11-25 18:55:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:12,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:12,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:12,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189039384] [2021-11-25 18:55:12,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189039384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:12,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:12,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:55:12,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830301490] [2021-11-25 18:55:12,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:12,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:12,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:12,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:12,601 INFO L87 Difference]: Start difference. First operand 922 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:14,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:14,982 INFO L93 Difference]: Finished difference Result 924 states and 1353 transitions. [2021-11-25 18:55:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-25 18:55:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:14,992 INFO L225 Difference]: With dead ends: 924 [2021-11-25 18:55:14,995 INFO L226 Difference]: Without dead ends: 921 [2021-11-25 18:55:14,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:15,000 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 667 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:15,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 587 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 18:55:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-25 18:55:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2021-11-25 18:55:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 621 states have (on average 1.463768115942029) internal successors, (909), 647 states have internal predecessors, (909), 223 states have call successors, (223), 77 states have call predecessors, (223), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-25 18:55:15,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1350 transitions. [2021-11-25 18:55:15,090 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1350 transitions. Word has length 21 [2021-11-25 18:55:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:15,091 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1350 transitions. [2021-11-25 18:55:15,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1350 transitions. [2021-11-25 18:55:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:55:15,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:15,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:15,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:55:15,095 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:15,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1911023818, now seen corresponding path program 1 times [2021-11-25 18:55:15,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:15,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143879841] [2021-11-25 18:55:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:15,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:15,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:15,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143879841] [2021-11-25 18:55:15,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143879841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:15,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:15,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:55:15,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125487348] [2021-11-25 18:55:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:15,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:15,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:15,294 INFO L87 Difference]: Start difference. First operand 921 states and 1350 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:17,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:17,674 INFO L93 Difference]: Finished difference Result 923 states and 1351 transitions. [2021-11-25 18:55:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 18:55:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:17,682 INFO L225 Difference]: With dead ends: 923 [2021-11-25 18:55:17,682 INFO L226 Difference]: Without dead ends: 920 [2021-11-25 18:55:17,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:17,685 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 664 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:17,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 585 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 18:55:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-25 18:55:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2021-11-25 18:55:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 621 states have (on average 1.462157809983897) internal successors, (908), 646 states have internal predecessors, (908), 222 states have call successors, (222), 77 states have call predecessors, (222), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-25 18:55:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1348 transitions. [2021-11-25 18:55:17,818 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1348 transitions. Word has length 22 [2021-11-25 18:55:17,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:17,818 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 1348 transitions. [2021-11-25 18:55:17,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1348 transitions. [2021-11-25 18:55:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:55:17,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:17,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:17,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:55:17,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 887559757, now seen corresponding path program 1 times [2021-11-25 18:55:17,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647163304] [2021-11-25 18:55:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:17,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:18,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647163304] [2021-11-25 18:55:18,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647163304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:18,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:18,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:55:18,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999207698] [2021-11-25 18:55:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:18,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:18,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:18,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:18,040 INFO L87 Difference]: Start difference. First operand 920 states and 1348 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:20,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:20,397 INFO L93 Difference]: Finished difference Result 922 states and 1349 transitions. [2021-11-25 18:55:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:20,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-25 18:55:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:20,406 INFO L225 Difference]: With dead ends: 922 [2021-11-25 18:55:20,406 INFO L226 Difference]: Without dead ends: 919 [2021-11-25 18:55:20,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:20,408 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 661 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:20,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 583 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 18:55:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-11-25 18:55:20,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2021-11-25 18:55:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 621 states have (on average 1.460547504025765) internal successors, (907), 645 states have internal predecessors, (907), 221 states have call successors, (221), 77 states have call predecessors, (221), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-25 18:55:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1346 transitions. [2021-11-25 18:55:20,477 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1346 transitions. Word has length 23 [2021-11-25 18:55:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:20,477 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1346 transitions. [2021-11-25 18:55:20,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1346 transitions. [2021-11-25 18:55:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:55:20,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:20,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:55:20,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:55:20,481 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1744309529, now seen corresponding path program 1 times [2021-11-25 18:55:20,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:20,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879590706] [2021-11-25 18:55:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:20,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:55:20,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:20,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879590706] [2021-11-25 18:55:20,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879590706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:20,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:20,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:55:20,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458369008] [2021-11-25 18:55:20,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:20,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:20,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:20,700 INFO L87 Difference]: Start difference. First operand 919 states and 1346 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:22,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:23,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:23,237 INFO L93 Difference]: Finished difference Result 2289 states and 3302 transitions. [2021-11-25 18:55:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:23,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 18:55:23,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:23,249 INFO L225 Difference]: With dead ends: 2289 [2021-11-25 18:55:23,249 INFO L226 Difference]: Without dead ends: 1365 [2021-11-25 18:55:23,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:23,255 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 631 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:23,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 911 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:55:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-11-25 18:55:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1359. [2021-11-25 18:55:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 894 states have (on average 1.4116331096196868) internal successors, (1262), 926 states have internal predecessors, (1262), 330 states have call successors, (330), 135 states have call predecessors, (330), 134 states have return successors, (334), 321 states have call predecessors, (334), 328 states have call successors, (334) [2021-11-25 18:55:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1926 transitions. [2021-11-25 18:55:23,358 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1926 transitions. Word has length 24 [2021-11-25 18:55:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:23,359 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 1926 transitions. [2021-11-25 18:55:23,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:55:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1926 transitions. [2021-11-25 18:55:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-25 18:55:23,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:23,368 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 18:55:23,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:55:23,369 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1744246743, now seen corresponding path program 1 times [2021-11-25 18:55:23,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137742898] [2021-11-25 18:55:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:23,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-25 18:55:23,696 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:23,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137742898] [2021-11-25 18:55:23,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137742898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:23,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:23,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:23,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969716755] [2021-11-25 18:55:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:23,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:23,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:23,698 INFO L87 Difference]: Start difference. First operand 1359 states and 1926 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:55:25,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:26,321 INFO L93 Difference]: Finished difference Result 2454 states and 3507 transitions. [2021-11-25 18:55:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:26,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 154 [2021-11-25 18:55:26,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:26,330 INFO L225 Difference]: With dead ends: 2454 [2021-11-25 18:55:26,330 INFO L226 Difference]: Without dead ends: 1096 [2021-11-25 18:55:26,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:26,337 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 298 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:26,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1181 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 18:55:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-25 18:55:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2021-11-25 18:55:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 744 states have (on average 1.461021505376344) internal successors, (1087), 762 states have internal predecessors, (1087), 246 states have call successors, (246), 106 states have call predecessors, (246), 105 states have return successors, (247), 241 states have call predecessors, (247), 244 states have call successors, (247) [2021-11-25 18:55:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1580 transitions. [2021-11-25 18:55:26,405 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1580 transitions. Word has length 154 [2021-11-25 18:55:26,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:26,406 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1580 transitions. [2021-11-25 18:55:26,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:55:26,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1580 transitions. [2021-11-25 18:55:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-25 18:55:26,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:26,413 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 18:55:26,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:55:26,414 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash 96110057, now seen corresponding path program 1 times [2021-11-25 18:55:26,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15768718] [2021-11-25 18:55:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:26,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-25 18:55:26,835 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15768718] [2021-11-25 18:55:26,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15768718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:26,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:26,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:55:26,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146240937] [2021-11-25 18:55:26,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:26,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:55:26,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:55:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:55:26,840 INFO L87 Difference]: Start difference. First operand 1096 states and 1580 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:55:28,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:29,553 INFO L93 Difference]: Finished difference Result 1997 states and 2879 transitions. [2021-11-25 18:55:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:55:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 169 [2021-11-25 18:55:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:29,563 INFO L225 Difference]: With dead ends: 1997 [2021-11-25 18:55:29,563 INFO L226 Difference]: Without dead ends: 1108 [2021-11-25 18:55:29,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:55:29,568 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 7 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:29,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1716 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 18:55:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-25 18:55:29,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1104. [2021-11-25 18:55:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 750 states have (on average 1.4573333333333334) internal successors, (1093), 769 states have internal predecessors, (1093), 247 states have call successors, (247), 106 states have call predecessors, (247), 106 states have return successors, (249), 242 states have call predecessors, (249), 245 states have call successors, (249) [2021-11-25 18:55:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2021-11-25 18:55:29,653 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 169 [2021-11-25 18:55:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:29,654 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2021-11-25 18:55:29,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 18:55:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2021-11-25 18:55:29,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 18:55:29,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:29,664 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 18:55:29,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:55:29,665 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:29,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2081288391, now seen corresponding path program 1 times [2021-11-25 18:55:29,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:29,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060730181] [2021-11-25 18:55:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:29,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-25 18:55:30,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:30,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060730181] [2021-11-25 18:55:30,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060730181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:30,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:30,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:55:30,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033132569] [2021-11-25 18:55:30,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:30,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:55:30,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:55:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:55:30,103 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:55:32,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:32,824 INFO L93 Difference]: Finished difference Result 2015 states and 2901 transitions. [2021-11-25 18:55:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:55:32,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 175 [2021-11-25 18:55:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:32,834 INFO L225 Difference]: With dead ends: 2015 [2021-11-25 18:55:32,835 INFO L226 Difference]: Without dead ends: 1118 [2021-11-25 18:55:32,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:55:32,840 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 7 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:32,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1721 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 18:55:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-11-25 18:55:32,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1109. [2021-11-25 18:55:32,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 754 states have (on average 1.4549071618037135) internal successors, (1097), 774 states have internal predecessors, (1097), 248 states have call successors, (248), 106 states have call predecessors, (248), 106 states have return successors, (250), 243 states have call predecessors, (250), 246 states have call successors, (250) [2021-11-25 18:55:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1595 transitions. [2021-11-25 18:55:32,917 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1595 transitions. Word has length 175 [2021-11-25 18:55:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:32,918 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1595 transitions. [2021-11-25 18:55:32,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-25 18:55:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1595 transitions. [2021-11-25 18:55:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-25 18:55:32,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:32,926 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 18:55:32,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:55:32,926 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash 691141769, now seen corresponding path program 1 times [2021-11-25 18:55:32,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:32,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694004906] [2021-11-25 18:55:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:32,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-25 18:55:33,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:33,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694004906] [2021-11-25 18:55:33,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694004906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:33,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:33,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:55:33,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116695712] [2021-11-25 18:55:33,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:33,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:55:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:33,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:55:33,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:55:33,283 INFO L87 Difference]: Start difference. First operand 1109 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-25 18:55:35,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:35,992 INFO L93 Difference]: Finished difference Result 2027 states and 2917 transitions. [2021-11-25 18:55:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:55:35,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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 192 [2021-11-25 18:55:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:36,002 INFO L225 Difference]: With dead ends: 2027 [2021-11-25 18:55:36,002 INFO L226 Difference]: Without dead ends: 1125 [2021-11-25 18:55:36,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:55:36,008 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 7 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:36,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1725 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 18:55:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-25 18:55:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1114. [2021-11-25 18:55:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 758 states have (on average 1.4525065963060686) internal successors, (1101), 779 states have internal predecessors, (1101), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2021-11-25 18:55:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1601 transitions. [2021-11-25 18:55:36,087 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1601 transitions. Word has length 192 [2021-11-25 18:55:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:36,089 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1601 transitions. [2021-11-25 18:55:36,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2021-11-25 18:55:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1601 transitions. [2021-11-25 18:55:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-25 18:55:36,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:36,097 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 18:55:36,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:55:36,098 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2037230334, now seen corresponding path program 1 times [2021-11-25 18:55:36,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:36,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985971199] [2021-11-25 18:55:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:36,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-25 18:55:36,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:36,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985971199] [2021-11-25 18:55:36,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985971199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:36,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:55:36,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:55:36,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62079063] [2021-11-25 18:55:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:36,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:36,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:36,482 INFO L87 Difference]: Start difference. First operand 1114 states and 1601 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-11-25 18:55:38,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:39,026 INFO L93 Difference]: Finished difference Result 2077 states and 2993 transitions. [2021-11-25 18:55:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:39,027 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), 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 194 [2021-11-25 18:55:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:39,037 INFO L225 Difference]: With dead ends: 2077 [2021-11-25 18:55:39,037 INFO L226 Difference]: Without dead ends: 1170 [2021-11-25 18:55:39,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:55:39,042 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 22 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:39,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1147 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 18:55:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-11-25 18:55:39,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1118. [2021-11-25 18:55:39,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 762 states have (on average 1.4501312335958005) internal successors, (1105), 783 states have internal predecessors, (1105), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2021-11-25 18:55:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1605 transitions. [2021-11-25 18:55:39,110 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1605 transitions. Word has length 194 [2021-11-25 18:55:39,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:39,111 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 1605 transitions. [2021-11-25 18:55:39,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-11-25 18:55:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1605 transitions. [2021-11-25 18:55:39,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-25 18:55:39,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:39,119 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-25 18:55:39,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:55:39,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:39,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:39,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2097996430, now seen corresponding path program 1 times [2021-11-25 18:55:39,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:39,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434491146] [2021-11-25 18:55:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:39,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-25 18:55:39,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434491146] [2021-11-25 18:55:39,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434491146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:39,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019779731] [2021-11-25 18:55:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:39,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:39,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:39,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:39,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:55:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:41,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 4340 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:55:41,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-25 18:55:41,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:55:41,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019779731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:55:41,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:55:41,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 18:55:41,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247411466] [2021-11-25 18:55:41,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:55:41,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:55:41,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:55:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:55:41,506 INFO L87 Difference]: Start difference. First operand 1118 states and 1605 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 18:55:43,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:44,121 INFO L93 Difference]: Finished difference Result 1423 states and 1991 transitions. [2021-11-25 18:55:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:55:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 201 [2021-11-25 18:55:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:44,131 INFO L225 Difference]: With dead ends: 1423 [2021-11-25 18:55:44,131 INFO L226 Difference]: Without dead ends: 1111 [2021-11-25 18:55:44,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:55:44,134 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 314 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:44,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1351 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 18:55:44,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-25 18:55:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1105. [2021-11-25 18:55:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 755 states have (on average 1.4516556291390728) internal successors, (1096), 773 states have internal predecessors, (1096), 245 states have call successors, (245), 106 states have call predecessors, (245), 104 states have return successors, (243), 239 states have call predecessors, (243), 243 states have call successors, (243) [2021-11-25 18:55:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1584 transitions. [2021-11-25 18:55:44,201 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1584 transitions. Word has length 201 [2021-11-25 18:55:44,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:44,202 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1584 transitions. [2021-11-25 18:55:44,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-25 18:55:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1584 transitions. [2021-11-25 18:55:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-25 18:55:44,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:44,215 INFO L514 BasicCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2021-11-25 18:55:44,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:44,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 18:55:44,433 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:44,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1926101036, now seen corresponding path program 1 times [2021-11-25 18:55:44,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:44,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251897569] [2021-11-25 18:55:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:44,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-25 18:55:44,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251897569] [2021-11-25 18:55:44,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251897569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903508327] [2021-11-25 18:55:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:44,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:44,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:44,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:45,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:55:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 6758 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:55:47,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:55:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-11-25 18:55:48,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:55:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-25 18:55:49,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903508327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:55:49,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673898528] [2021-11-25 18:55:49,115 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2021-11-25 18:55:49,115 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:55:49,122 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-25 18:55:49,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:55:49,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-25 18:55:49,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228711062] [2021-11-25 18:55:49,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:55:49,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:55:49,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:55:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:55:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:55:49,137 INFO L87 Difference]: Start difference. First operand 1105 states and 1584 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2021-11-25 18:55:51,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:55:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:55:52,173 INFO L93 Difference]: Finished difference Result 2115 states and 3043 transitions. [2021-11-25 18:55:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:55:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) Word has length 365 [2021-11-25 18:55:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:55:52,186 INFO L225 Difference]: With dead ends: 2115 [2021-11-25 18:55:52,186 INFO L226 Difference]: Without dead ends: 1217 [2021-11-25 18:55:52,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:55:52,193 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 85 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:55:52,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 2240 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 426 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 18:55:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-11-25 18:55:52,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1217. [2021-11-25 18:55:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 831 states have (on average 1.434416365824308) internal successors, (1192), 849 states have internal predecessors, (1192), 281 states have call successors, (281), 106 states have call predecessors, (281), 104 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-11-25 18:55:52,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1752 transitions. [2021-11-25 18:55:52,305 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1752 transitions. Word has length 365 [2021-11-25 18:55:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:55:52,306 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1752 transitions. [2021-11-25 18:55:52,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2021-11-25 18:55:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1752 transitions. [2021-11-25 18:55:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-25 18:55:52,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:55:52,322 INFO L514 BasicCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2021-11-25 18:55:52,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:55:52,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:52,536 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:55:52,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:55:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1381984340, now seen corresponding path program 2 times [2021-11-25 18:55:52,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:55:52,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410621199] [2021-11-25 18:55:52,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:55:52,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:55:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:55:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 99 proven. 32 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2021-11-25 18:55:53,307 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:55:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410621199] [2021-11-25 18:55:53,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410621199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:55:53,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016330764] [2021-11-25 18:55:53,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:55:53,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:55:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:55:53,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:55:53,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d7002ef5-7794-43fe-bf8b-10294bef18d1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process