./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.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_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/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_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/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_cd4814a3-8501-4e04-ab7c-d3da9f377421/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 2689726c89c7be154f3b0bf0875aa4770854a9a3388665dc7aff0604f303b757 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:48:21,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:48:21,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:48:21,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:48:21,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:48:21,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:48:21,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:48:21,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:48:21,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:48:21,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:48:21,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:48:21,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:48:21,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:48:21,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:48:21,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:48:21,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:48:21,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:48:21,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:48:21,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:48:21,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:48:21,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:48:21,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:48:21,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:48:21,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:48:21,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:48:21,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:48:21,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:48:21,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:48:21,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:48:21,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:48:21,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:48:21,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:48:21,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:48:21,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:48:21,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:48:21,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:48:21,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:48:21,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:48:21,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:48:21,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:48:21,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:48:21,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 17:48:21,184 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:48:21,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:48:21,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:48:21,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:48:21,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:48:21,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:48:21,186 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:48:21,187 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:48:21,187 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:48:21,187 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:48:21,188 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:48:21,188 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:48:21,189 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:48:21,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:48:21,189 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:48:21,189 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:48:21,189 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:48:21,190 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:48:21,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:48:21,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:48:21,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:48:21,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:48:21,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:48:21,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:48:21,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:48:21,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:48:21,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:48:21,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:48:21,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:48:21,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:48:21,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:48:21,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:48:21,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:48:21,195 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:48:21,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:48:21,196 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:48:21,196 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:48:21,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:48:21,196 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_cd4814a3-8501-4e04-ab7c-d3da9f377421/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2689726c89c7be154f3b0bf0875aa4770854a9a3388665dc7aff0604f303b757 [2021-11-25 17:48:21,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:48:21,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:48:21,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:48:21,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:48:21,496 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:48:21,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2021-11-25 17:48:21,580 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/data/26ed0f207/4a637b1c74424a569a64427934c5dbfe/FLAG193a6d580 [2021-11-25 17:48:22,472 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:48:22,473 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2021-11-25 17:48:22,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/data/26ed0f207/4a637b1c74424a569a64427934c5dbfe/FLAG193a6d580 [2021-11-25 17:48:22,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/data/26ed0f207/4a637b1c74424a569a64427934c5dbfe [2021-11-25 17:48:22,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:48:22,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:48:22,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:48:22,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:48:22,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:48:22,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:22" (1/1) ... [2021-11-25 17:48:22,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c7a57a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:22, skipping insertion in model container [2021-11-25 17:48:22,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:48:22" (1/1) ... [2021-11-25 17:48:22,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:48:23,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:48:25,264 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_cd4814a3-8501-4e04-ab7c-d3da9f377421/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i[258393,258406] [2021-11-25 17:48:25,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:48:25,530 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:48:25,997 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_cd4814a3-8501-4e04-ab7c-d3da9f377421/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i[258393,258406] [2021-11-25 17:48:26,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:48:26,223 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:48:26,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26 WrapperNode [2021-11-25 17:48:26,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:48:26,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:48:26,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:48:26,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:48:26,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,600 INFO L137 Inliner]: procedures = 303, calls = 3661, calls flagged for inlining = 138, calls inlined = 95, statements flattened = 4833 [2021-11-25 17:48:26,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:48:26,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:48:26,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:48:26,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:48:26,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:48:26,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:48:26,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:48:26,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:48:26,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (1/1) ... [2021-11-25 17:48:26,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:48:26,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:48:26,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:48:27,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:48:27,045 INFO L130 BoogieDeclarations]: Found specification of procedure rio_uevent [2021-11-25 17:48:27,045 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_uevent [2021-11-25 17:48:27,045 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2021-11-25 17:48:27,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2021-11-25 17:48:27,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 17:48:27,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 17:48:27,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 17:48:27,046 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 17:48:27,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 17:48:27,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 17:48:27,046 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2021-11-25 17:48:27,046 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2021-11-25 17:48:27,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-25 17:48:27,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-25 17:48:27,047 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2021-11-25 17:48:27,047 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2021-11-25 17:48:27,047 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 17:48:27,047 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 17:48:27,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 17:48:27,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 17:48:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_16 [2021-11-25 17:48:27,048 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_16 [2021-11-25 17:48:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-25 17:48:27,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-25 17:48:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 17:48:27,048 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 17:48:27,048 INFO L130 BoogieDeclarations]: Found specification of procedure rio_device_remove [2021-11-25 17:48:27,049 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_device_remove [2021-11-25 17:48:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 17:48:27,049 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 17:48:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure bus_scan_store [2021-11-25 17:48:27,049 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_scan_store [2021-11-25 17:48:27,049 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 17:48:27,050 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 17:48:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-25 17:48:27,050 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-25 17:48:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure disc_work_handler [2021-11-25 17:48:27,050 INFO L138 BoogieDeclarations]: Found implementation of procedure disc_work_handler [2021-11-25 17:48:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:48:27,050 INFO L130 BoogieDeclarations]: Found specification of procedure rio_dev_put [2021-11-25 17:48:27,050 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_dev_put [2021-11-25 17:48:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 17:48:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2021-11-25 17:48:27,051 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2021-11-25 17:48:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 17:48:27,051 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 17:48:27,051 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_16 [2021-11-25 17:48:27,052 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_16 [2021-11-25 17:48:27,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:48:27,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 17:48:27,053 INFO L130 BoogieDeclarations]: Found specification of procedure rio_mport_read_config_32 [2021-11-25 17:48:27,054 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_mport_read_config_32 [2021-11-25 17:48:27,054 INFO L130 BoogieDeclarations]: Found specification of procedure rio_mport_write_config_32 [2021-11-25 17:48:27,054 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_mport_write_config_32 [2021-11-25 17:48:27,054 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-25 17:48:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-25 17:48:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-25 17:48:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-25 17:48:27,055 INFO L130 BoogieDeclarations]: Found specification of procedure rio_name [2021-11-25 17:48:27,055 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_name [2021-11-25 17:48:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 17:48:27,056 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 17:48:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure rio_device_probe [2021-11-25 17:48:27,056 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_device_probe [2021-11-25 17:48:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-25 17:48:27,056 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-25 17:48:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_32 [2021-11-25 17:48:27,056 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_32 [2021-11-25 17:48:27,056 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-25 17:48:27,057 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-25 17:48:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 17:48:27,057 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~~u32~0~TO~int [2021-11-25 17:48:27,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~~u32~0~TO~int [2021-11-25 17:48:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure rio_dev_get [2021-11-25 17:48:27,058 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_dev_get [2021-11-25 17:48:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 17:48:27,058 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 17:48:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 17:48:27,058 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 17:48:27,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 17:48:27,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 17:48:27,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 17:48:27,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 17:48:27,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 17:48:27,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 17:48:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:48:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 17:48:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 17:48:27,060 INFO L130 BoogieDeclarations]: Found specification of procedure release_resource [2021-11-25 17:48:27,061 INFO L138 BoogieDeclarations]: Found implementation of procedure release_resource [2021-11-25 17:48:27,061 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_8 [2021-11-25 17:48:27,061 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_8 [2021-11-25 17:48:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure rio_match_bus [2021-11-25 17:48:27,062 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_match_bus [2021-11-25 17:48:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure rio_read_config_32 [2021-11-25 17:48:27,062 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_read_config_32 [2021-11-25 17:48:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2021-11-25 17:48:27,062 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2021-11-25 17:48:27,062 INFO L130 BoogieDeclarations]: Found specification of procedure rio_match_device [2021-11-25 17:48:27,062 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_match_device [2021-11-25 17:48:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-25 17:48:27,063 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-25 17:48:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure rio_write_config_8 [2021-11-25 17:48:27,063 INFO L138 BoogieDeclarations]: Found implementation of procedure rio_write_config_8 [2021-11-25 17:48:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:48:27,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:48:27,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:48:27,064 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~$Pointer$~TO~int [2021-11-25 17:48:27,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~~u16~0~X~~u8~0~X~~u32~0~X~int~X~$Pointer$~TO~int [2021-11-25 17:48:27,851 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:48:27,856 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:48:28,027 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 17:48:32,530 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:48:33,105 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:48:33,105 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 17:48:33,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:48:33 BoogieIcfgContainer [2021-11-25 17:48:33,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:48:33,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:48:33,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:48:33,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:48:33,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:48:22" (1/3) ... [2021-11-25 17:48:33,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f407e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:48:33, skipping insertion in model container [2021-11-25 17:48:33,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:48:26" (2/3) ... [2021-11-25 17:48:33,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f407e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:48:33, skipping insertion in model container [2021-11-25 17:48:33,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:48:33" (3/3) ... [2021-11-25 17:48:33,118 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--rapidio--rapidio.ko-entry_point.cil.out.i [2021-11-25 17:48:33,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:48:33,123 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:48:33,177 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:48:33,183 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 17:48:33,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:48:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 720 states, 474 states have (on average 1.3924050632911393) internal successors, (660), 505 states have internal predecessors, (660), 197 states have call successors, (197), 48 states have call predecessors, (197), 47 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) [2021-11-25 17:48:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-25 17:48:33,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:33,230 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 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 17:48:33,230 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:33,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1952398704, now seen corresponding path program 1 times [2021-11-25 17:48:33,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:33,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404192694] [2021-11-25 17:48:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:33,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 17:48:34,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:34,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404192694] [2021-11-25 17:48:34,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404192694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:34,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:34,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:48:34,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409715533] [2021-11-25 17:48:34,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:34,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:48:34,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:48:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:48:34,297 INFO L87 Difference]: Start difference. First operand has 720 states, 474 states have (on average 1.3924050632911393) internal successors, (660), 505 states have internal predecessors, (660), 197 states have call successors, (197), 48 states have call predecessors, (197), 47 states have return successors, (177), 176 states have call predecessors, (177), 177 states have call successors, (177) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 17:48:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:35,131 INFO L93 Difference]: Finished difference Result 2124 states and 3089 transitions. [2021-11-25 17:48:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:48:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2021-11-25 17:48:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:35,161 INFO L225 Difference]: With dead ends: 2124 [2021-11-25 17:48:35,161 INFO L226 Difference]: Without dead ends: 1369 [2021-11-25 17:48:35,176 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 17:48:35,179 INFO L933 BasicCegarLoop]: 1096 mSDtfsCounter, 983 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:35,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 2016 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:48:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-11-25 17:48:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1366. [2021-11-25 17:48:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 930 states have (on average 1.3483870967741935) internal successors, (1254), 947 states have internal predecessors, (1254), 343 states have call successors, (343), 93 states have call predecessors, (343), 92 states have return successors, (341), 339 states have call predecessors, (341), 341 states have call successors, (341) [2021-11-25 17:48:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1938 transitions. [2021-11-25 17:48:35,440 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1938 transitions. Word has length 64 [2021-11-25 17:48:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:48:35,441 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 1938 transitions. [2021-11-25 17:48:35,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 17:48:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1938 transitions. [2021-11-25 17:48:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 17:48:35,454 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:35,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 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 17:48:35,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:48:35,456 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1046530533, now seen corresponding path program 1 times [2021-11-25 17:48:35,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:35,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284940639] [2021-11-25 17:48:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:35,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 17:48:35,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:35,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284940639] [2021-11-25 17:48:35,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284940639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:35,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:35,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:48:35,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479570892] [2021-11-25 17:48:35,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:35,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:48:35,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:35,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:48:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:48:35,993 INFO L87 Difference]: Start difference. First operand 1366 states and 1938 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 17:48:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:36,625 INFO L93 Difference]: Finished difference Result 2640 states and 3778 transitions. [2021-11-25 17:48:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:48:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2021-11-25 17:48:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:36,649 INFO L225 Difference]: With dead ends: 2640 [2021-11-25 17:48:36,649 INFO L226 Difference]: Without dead ends: 2635 [2021-11-25 17:48:36,651 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 17:48:36,652 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 899 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1943 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:36,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 1943 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:48:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-11-25 17:48:36,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2625. [2021-11-25 17:48:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 1792 states have (on average 1.3532366071428572) internal successors, (2425), 1833 states have internal predecessors, (2425), 656 states have call successors, (656), 179 states have call predecessors, (656), 176 states have return successors, (674), 640 states have call predecessors, (674), 654 states have call successors, (674) [2021-11-25 17:48:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 3755 transitions. [2021-11-25 17:48:36,824 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 3755 transitions. Word has length 67 [2021-11-25 17:48:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:48:36,825 INFO L470 AbstractCegarLoop]: Abstraction has 2625 states and 3755 transitions. [2021-11-25 17:48:36,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 17:48:36,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 3755 transitions. [2021-11-25 17:48:36,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 17:48:36,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:36,830 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:36,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:48:36,830 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:36,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1362520148, now seen corresponding path program 1 times [2021-11-25 17:48:36,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:36,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016200139] [2021-11-25 17:48:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:36,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 17:48:37,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016200139] [2021-11-25 17:48:37,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016200139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:37,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:37,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:48:37,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82466422] [2021-11-25 17:48:37,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:37,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:48:37,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:48:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:48:37,304 INFO L87 Difference]: Start difference. First operand 2625 states and 3755 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 17:48:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:38,102 INFO L93 Difference]: Finished difference Result 7755 states and 11068 transitions. [2021-11-25 17:48:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:48:38,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2021-11-25 17:48:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:38,154 INFO L225 Difference]: With dead ends: 7755 [2021-11-25 17:48:38,154 INFO L226 Difference]: Without dead ends: 5139 [2021-11-25 17:48:38,172 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 17:48:38,178 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 934 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 1905 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:38,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [934 Valid, 1905 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 17:48:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2021-11-25 17:48:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 5131. [2021-11-25 17:48:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5131 states, 3498 states have (on average 1.349056603773585) internal successors, (4719), 3581 states have internal predecessors, (4719), 1280 states have call successors, (1280), 357 states have call predecessors, (1280), 352 states have return successors, (1316), 1248 states have call predecessors, (1316), 1278 states have call successors, (1316) [2021-11-25 17:48:38,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 7315 transitions. [2021-11-25 17:48:38,559 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 7315 transitions. Word has length 91 [2021-11-25 17:48:38,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:48:38,559 INFO L470 AbstractCegarLoop]: Abstraction has 5131 states and 7315 transitions. [2021-11-25 17:48:38,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 17:48:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 7315 transitions. [2021-11-25 17:48:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 17:48:38,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:38,564 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:38,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:48:38,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:38,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:38,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1827562928, now seen corresponding path program 1 times [2021-11-25 17:48:38,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:38,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794749543] [2021-11-25 17:48:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:38,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 17:48:39,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:39,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794749543] [2021-11-25 17:48:39,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794749543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:39,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:39,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:48:39,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085135694] [2021-11-25 17:48:39,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:39,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:48:39,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:39,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:48:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:48:39,036 INFO L87 Difference]: Start difference. First operand 5131 states and 7315 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 17:48:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:40,139 INFO L93 Difference]: Finished difference Result 14927 states and 21236 transitions. [2021-11-25 17:48:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:48:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 103 [2021-11-25 17:48:40,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:40,226 INFO L225 Difference]: With dead ends: 14927 [2021-11-25 17:48:40,226 INFO L226 Difference]: Without dead ends: 9805 [2021-11-25 17:48:40,248 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 17:48:40,252 INFO L933 BasicCegarLoop]: 1153 mSDtfsCounter, 919 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:40,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 2008 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:48:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9805 states. [2021-11-25 17:48:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9805 to 9795. [2021-11-25 17:48:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9795 states, 6666 states have (on average 1.3427842784278428) internal successors, (8951), 6821 states have internal predecessors, (8951), 2448 states have call successors, (2448), 689 states have call predecessors, (2448), 680 states have return successors, (2518), 2388 states have call predecessors, (2518), 2446 states have call successors, (2518) [2021-11-25 17:48:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9795 states to 9795 states and 13917 transitions. [2021-11-25 17:48:40,912 INFO L78 Accepts]: Start accepts. Automaton has 9795 states and 13917 transitions. Word has length 103 [2021-11-25 17:48:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:48:40,915 INFO L470 AbstractCegarLoop]: Abstraction has 9795 states and 13917 transitions. [2021-11-25 17:48:40,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-25 17:48:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9795 states and 13917 transitions. [2021-11-25 17:48:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 17:48:40,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:40,928 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:48:40,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:48:40,928 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1495776247, now seen corresponding path program 1 times [2021-11-25 17:48:40,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:40,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356142110] [2021-11-25 17:48:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:40,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-25 17:48:41,427 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:41,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356142110] [2021-11-25 17:48:41,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356142110] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:41,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:41,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:48:41,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929753855] [2021-11-25 17:48:41,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:41,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:48:41,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:41,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:48:41,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:48:41,430 INFO L87 Difference]: Start difference. First operand 9795 states and 13917 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 17:48:42,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:42,999 INFO L93 Difference]: Finished difference Result 27061 states and 38366 transitions. [2021-11-25 17:48:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:48:43,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 130 [2021-11-25 17:48:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:43,138 INFO L225 Difference]: With dead ends: 27061 [2021-11-25 17:48:43,138 INFO L226 Difference]: Without dead ends: 17275 [2021-11-25 17:48:43,193 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 17:48:43,194 INFO L933 BasicCegarLoop]: 1163 mSDtfsCounter, 746 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2032 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:43,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 2032 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 17:48:43,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17275 states. [2021-11-25 17:48:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17275 to 17237. [2021-11-25 17:48:44,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17237 states, 11880 states have (on average 1.3411616161616162) internal successors, (15933), 12073 states have internal predecessors, (15933), 4196 states have call successors, (4196), 1169 states have call predecessors, (4196), 1160 states have return successors, (4274), 4122 states have call predecessors, (4274), 4194 states have call successors, (4274) [2021-11-25 17:48:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17237 states to 17237 states and 24403 transitions. [2021-11-25 17:48:44,294 INFO L78 Accepts]: Start accepts. Automaton has 17237 states and 24403 transitions. Word has length 130 [2021-11-25 17:48:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:48:44,295 INFO L470 AbstractCegarLoop]: Abstraction has 17237 states and 24403 transitions. [2021-11-25 17:48:44,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 17:48:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 17237 states and 24403 transitions. [2021-11-25 17:48:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-25 17:48:44,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:44,306 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-11-25 17:48:44,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:48:44,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:44,307 INFO L85 PathProgramCache]: Analyzing trace with hash 94572577, now seen corresponding path program 1 times [2021-11-25 17:48:44,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:44,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853641403] [2021-11-25 17:48:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:44,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-25 17:48:44,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853641403] [2021-11-25 17:48:44,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853641403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:44,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:44,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:48:44,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9160373] [2021-11-25 17:48:44,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:44,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:48:44,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:44,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:48:44,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:48:44,826 INFO L87 Difference]: Start difference. First operand 17237 states and 24403 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 17:48:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:46,477 INFO L93 Difference]: Finished difference Result 42915 states and 60778 transitions. [2021-11-25 17:48:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:48:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-11-25 17:48:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:46,634 INFO L225 Difference]: With dead ends: 42915 [2021-11-25 17:48:46,634 INFO L226 Difference]: Without dead ends: 25687 [2021-11-25 17:48:46,714 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 17:48:46,715 INFO L933 BasicCegarLoop]: 1458 mSDtfsCounter, 940 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:46,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [940 Valid, 2316 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 17:48:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25687 states. [2021-11-25 17:48:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25687 to 25679. [2021-11-25 17:48:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25679 states, 17758 states have (on average 1.3386079513458722) internal successors, (23771), 18037 states have internal predecessors, (23771), 6192 states have call successors, (6192), 1741 states have call predecessors, (6192), 1728 states have return successors, (6306), 6084 states have call predecessors, (6306), 6190 states have call successors, (6306) [2021-11-25 17:48:48,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25679 states to 25679 states and 36269 transitions. [2021-11-25 17:48:48,274 INFO L78 Accepts]: Start accepts. Automaton has 25679 states and 36269 transitions. Word has length 159 [2021-11-25 17:48:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:48:48,276 INFO L470 AbstractCegarLoop]: Abstraction has 25679 states and 36269 transitions. [2021-11-25 17:48:48,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 17:48:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 25679 states and 36269 transitions. [2021-11-25 17:48:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-25 17:48:48,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:48,293 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2021-11-25 17:48:48,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:48:48,294 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash -648475835, now seen corresponding path program 1 times [2021-11-25 17:48:48,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:48,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016704021] [2021-11-25 17:48:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:48,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-11-25 17:48:48,788 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:48,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016704021] [2021-11-25 17:48:48,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016704021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:48,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:48,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:48:48,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063741507] [2021-11-25 17:48:48,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:48,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:48:48,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:48,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:48:48,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:48:48,791 INFO L87 Difference]: Start difference. First operand 25679 states and 36269 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 17:48:50,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:50,818 INFO L93 Difference]: Finished difference Result 63785 states and 90134 transitions. [2021-11-25 17:48:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:48:50,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 171 [2021-11-25 17:48:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:51,120 INFO L225 Difference]: With dead ends: 63785 [2021-11-25 17:48:51,120 INFO L226 Difference]: Without dead ends: 38115 [2021-11-25 17:48:51,188 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 17:48:51,190 INFO L933 BasicCegarLoop]: 1450 mSDtfsCounter, 926 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:51,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 2306 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:48:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38115 states. [2021-11-25 17:48:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38115 to 38097. [2021-11-25 17:48:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38097 states, 26440 states have (on average 1.3359682299546143) internal successors, (35323), 26837 states have internal predecessors, (35323), 9102 states have call successors, (9102), 2573 states have call predecessors, (9102), 2554 states have return successors, (9268), 8946 states have call predecessors, (9268), 9100 states have call successors, (9268) [2021-11-25 17:48:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38097 states to 38097 states and 53693 transitions. [2021-11-25 17:48:53,161 INFO L78 Accepts]: Start accepts. Automaton has 38097 states and 53693 transitions. Word has length 171 [2021-11-25 17:48:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:48:53,162 INFO L470 AbstractCegarLoop]: Abstraction has 38097 states and 53693 transitions. [2021-11-25 17:48:53,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 17:48:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 38097 states and 53693 transitions. [2021-11-25 17:48:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-25 17:48:53,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:48:53,341 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:48:53,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:48:53,341 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:48:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:48:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash 402589493, now seen corresponding path program 1 times [2021-11-25 17:48:53,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:48:53,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602491608] [2021-11-25 17:48:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:48:53,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:48:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:48:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-25 17:48:53,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:48:53,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602491608] [2021-11-25 17:48:53,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602491608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:48:53,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:48:53,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:48:53,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543429760] [2021-11-25 17:48:53,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:48:53,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:48:53,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:48:53,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:48:53,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:48:53,997 INFO L87 Difference]: Start difference. First operand 38097 states and 53693 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 17:48:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:48:57,932 INFO L93 Difference]: Finished difference Result 88699 states and 125164 transitions. [2021-11-25 17:48:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:48:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 176 [2021-11-25 17:48:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:48:58,179 INFO L225 Difference]: With dead ends: 88699 [2021-11-25 17:48:58,179 INFO L226 Difference]: Without dead ends: 50611 [2021-11-25 17:48:58,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:48:58,286 INFO L933 BasicCegarLoop]: 1470 mSDtfsCounter, 978 mSDsluCounter, 4782 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 5748 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:48:58,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 5748 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 17:48:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50611 states. [2021-11-25 17:49:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50611 to 50435. [2021-11-25 17:49:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50435 states, 35026 states have (on average 1.3346371267058756) internal successors, (46747), 35565 states have internal predecessors, (46747), 12032 states have call successors, (12032), 3377 states have call predecessors, (12032), 3376 states have return successors, (12282), 11852 states have call predecessors, (12282), 12030 states have call successors, (12282) [2021-11-25 17:49:01,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50435 states to 50435 states and 71061 transitions. [2021-11-25 17:49:01,172 INFO L78 Accepts]: Start accepts. Automaton has 50435 states and 71061 transitions. Word has length 176 [2021-11-25 17:49:01,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:01,173 INFO L470 AbstractCegarLoop]: Abstraction has 50435 states and 71061 transitions. [2021-11-25 17:49:01,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 17:49:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 50435 states and 71061 transitions. [2021-11-25 17:49:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-25 17:49:01,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:01,204 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2021-11-25 17:49:01,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:49:01,205 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:01,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1237735906, now seen corresponding path program 1 times [2021-11-25 17:49:01,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:01,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896011469] [2021-11-25 17:49:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:01,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-25 17:49:01,779 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:01,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896011469] [2021-11-25 17:49:01,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896011469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:01,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:01,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:49:01,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893115593] [2021-11-25 17:49:01,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:01,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:49:01,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:49:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:49:01,782 INFO L87 Difference]: Start difference. First operand 50435 states and 71061 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 17:49:03,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:03,766 INFO L93 Difference]: Finished difference Result 95829 states and 134829 transitions. [2021-11-25 17:49:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:49:03,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 198 [2021-11-25 17:49:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:03,929 INFO L225 Difference]: With dead ends: 95829 [2021-11-25 17:49:03,930 INFO L226 Difference]: Without dead ends: 45403 [2021-11-25 17:49:04,071 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 17:49:04,074 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 785 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:04,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 757 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:49:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45403 states. [2021-11-25 17:49:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45403 to 45343. [2021-11-25 17:49:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45343 states, 32066 states have (on average 1.3318468159421193) internal successors, (42707), 32257 states have internal predecessors, (42707), 10400 states have call successors, (10400), 2853 states have call predecessors, (10400), 2876 states have return successors, (10482), 10352 states have call predecessors, (10482), 10398 states have call successors, (10482) [2021-11-25 17:49:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45343 states to 45343 states and 63589 transitions. [2021-11-25 17:49:06,655 INFO L78 Accepts]: Start accepts. Automaton has 45343 states and 63589 transitions. Word has length 198 [2021-11-25 17:49:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:06,657 INFO L470 AbstractCegarLoop]: Abstraction has 45343 states and 63589 transitions. [2021-11-25 17:49:06,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 17:49:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 45343 states and 63589 transitions. [2021-11-25 17:49:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-25 17:49:06,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:06,685 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2021-11-25 17:49:06,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:49:06,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:06,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1185447967, now seen corresponding path program 1 times [2021-11-25 17:49:06,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:06,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835373519] [2021-11-25 17:49:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:06,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-25 17:49:07,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:07,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835373519] [2021-11-25 17:49:07,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835373519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:07,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:07,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:49:07,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796443386] [2021-11-25 17:49:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:07,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:49:07,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:49:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:49:07,451 INFO L87 Difference]: Start difference. First operand 45343 states and 63589 transitions. Second operand has 6 states, 4 states have (on average 18.75) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 17:49:09,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:09,414 INFO L93 Difference]: Finished difference Result 91061 states and 127981 transitions. [2021-11-25 17:49:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:49:09,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 18.75) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 204 [2021-11-25 17:49:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:09,791 INFO L225 Difference]: With dead ends: 91061 [2021-11-25 17:49:09,792 INFO L226 Difference]: Without dead ends: 45439 [2021-11-25 17:49:09,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:49:09,957 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 3 mSDsluCounter, 3321 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3741 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:09,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 3741 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:49:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-11-25 17:49:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 45439. [2021-11-25 17:49:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45439 states, 32162 states have (on average 1.3308562900317145) internal successors, (42803), 32353 states have internal predecessors, (42803), 10400 states have call successors, (10400), 2853 states have call predecessors, (10400), 2876 states have return successors, (10482), 10352 states have call predecessors, (10482), 10398 states have call successors, (10482) [2021-11-25 17:49:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45439 states to 45439 states and 63685 transitions. [2021-11-25 17:49:11,949 INFO L78 Accepts]: Start accepts. Automaton has 45439 states and 63685 transitions. Word has length 204 [2021-11-25 17:49:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:11,950 INFO L470 AbstractCegarLoop]: Abstraction has 45439 states and 63685 transitions. [2021-11-25 17:49:11,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 18.75) internal successors, (75), 6 states have internal predecessors, (75), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 17:49:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 45439 states and 63685 transitions. [2021-11-25 17:49:11,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-25 17:49:11,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:11,989 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2021-11-25 17:49:11,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 17:49:11,989 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash -819121465, now seen corresponding path program 1 times [2021-11-25 17:49:11,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:11,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846106989] [2021-11-25 17:49:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:11,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2021-11-25 17:49:12,949 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846106989] [2021-11-25 17:49:12,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846106989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:49:12,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835144280] [2021-11-25 17:49:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:12,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:12,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:49:12,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:49:12,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:49:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:14,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 7008 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 17:49:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:49:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-25 17:49:15,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:49:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835144280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:15,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:49:15,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 15 [2021-11-25 17:49:15,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418771179] [2021-11-25 17:49:15,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:15,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 17:49:15,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:15,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 17:49:15,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-25 17:49:15,398 INFO L87 Difference]: Start difference. First operand 45439 states and 63685 transitions. Second operand has 10 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 17:49:25,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:25,148 INFO L93 Difference]: Finished difference Result 110031 states and 159917 transitions. [2021-11-25 17:49:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 17:49:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 205 [2021-11-25 17:49:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:25,525 INFO L225 Difference]: With dead ends: 110031 [2021-11-25 17:49:25,525 INFO L226 Difference]: Without dead ends: 110028 [2021-11-25 17:49:25,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-11-25 17:49:25,559 INFO L933 BasicCegarLoop]: 1596 mSDtfsCounter, 2007 mSDsluCounter, 7283 mSDsCounter, 0 mSdLazyCounter, 7380 mSolverCounterSat, 866 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2229 SdHoareTripleChecker+Valid, 8170 SdHoareTripleChecker+Invalid, 8246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 866 IncrementalHoareTripleChecker+Valid, 7380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:25,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2229 Valid, 8170 Invalid, 8246 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [866 Valid, 7380 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2021-11-25 17:49:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110028 states. [2021-11-25 17:49:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110028 to 68907. [2021-11-25 17:49:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68907 states, 48725 states have (on average 1.3278399179066187) internal successors, (64699), 49107 states have internal predecessors, (64699), 15657 states have call successors, (15657), 4333 states have call predecessors, (15657), 4524 states have return successors, (16127), 15646 states have call predecessors, (16127), 15655 states have call successors, (16127) [2021-11-25 17:49:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68907 states to 68907 states and 96483 transitions. [2021-11-25 17:49:30,073 INFO L78 Accepts]: Start accepts. Automaton has 68907 states and 96483 transitions. Word has length 205 [2021-11-25 17:49:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:30,073 INFO L470 AbstractCegarLoop]: Abstraction has 68907 states and 96483 transitions. [2021-11-25 17:49:30,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 9.5) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (22), 4 states have call predecessors, (22), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 17:49:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68907 states and 96483 transitions. [2021-11-25 17:49:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-25 17:49:30,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:30,104 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:30,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 17:49:30,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd4814a3-8501-4e04-ab7c-d3da9f377421/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:49:30,319 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash -65226658, now seen corresponding path program 1 times [2021-11-25 17:49:30,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:30,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380697860] [2021-11-25 17:49:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:30,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-25 17:49:30,829 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380697860] [2021-11-25 17:49:30,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380697860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:30,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:30,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:49:30,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097866990] [2021-11-25 17:49:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:30,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:49:30,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:49:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:30,833 INFO L87 Difference]: Start difference. First operand 68907 states and 96483 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 17:49:34,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:34,189 INFO L93 Difference]: Finished difference Result 138693 states and 194225 transitions. [2021-11-25 17:49:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:49:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) Word has length 198 [2021-11-25 17:49:34,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:34,386 INFO L225 Difference]: With dead ends: 138693 [2021-11-25 17:49:34,386 INFO L226 Difference]: Without dead ends: 69795 [2021-11-25 17:49:34,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:49:34,502 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 4 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:34,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 3041 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 17:49:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69795 states. [2021-11-25 17:49:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69795 to 69339. [2021-11-25 17:49:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69339 states, 49013 states have (on average 1.3259135331442677) internal successors, (64987), 49395 states have internal predecessors, (64987), 15729 states have call successors, (15729), 4333 states have call predecessors, (15729), 4596 states have return successors, (16343), 15790 states have call predecessors, (16343), 15727 states have call successors, (16343) [2021-11-25 17:49:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69339 states to 69339 states and 97059 transitions. [2021-11-25 17:49:37,703 INFO L78 Accepts]: Start accepts. Automaton has 69339 states and 97059 transitions. Word has length 198 [2021-11-25 17:49:37,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:37,703 INFO L470 AbstractCegarLoop]: Abstraction has 69339 states and 97059 transitions. [2021-11-25 17:49:37,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (18), 4 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 17:49:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 69339 states and 97059 transitions. [2021-11-25 17:49:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-25 17:49:37,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:37,737 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:37,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:49:37,737 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:37,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1007737186, now seen corresponding path program 1 times [2021-11-25 17:49:37,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:37,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760461309] [2021-11-25 17:49:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:37,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:49:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:49:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-25 17:49:39,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:49:39,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760461309] [2021-11-25 17:49:39,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760461309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:49:39,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:49:39,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 17:49:39,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425334150] [2021-11-25 17:49:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:49:39,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 17:49:39,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:49:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 17:49:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:49:39,280 INFO L87 Difference]: Start difference. First operand 69339 states and 97059 transitions. Second operand has 12 states, 10 states have (on average 9.0) internal successors, (90), 11 states have internal predecessors, (90), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 17:49:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:49:43,408 INFO L93 Difference]: Finished difference Result 141549 states and 198293 transitions. [2021-11-25 17:49:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 17:49:43,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 9.0) internal successors, (90), 11 states have internal predecessors, (90), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 199 [2021-11-25 17:49:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:49:43,614 INFO L225 Difference]: With dead ends: 141549 [2021-11-25 17:49:43,614 INFO L226 Difference]: Without dead ends: 72219 [2021-11-25 17:49:43,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-25 17:49:43,749 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 110 mSDsluCounter, 8249 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 8193 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:49:43,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 8193 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 17:49:43,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72219 states. [2021-11-25 17:49:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72219 to 69951. [2021-11-25 17:49:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69951 states, 49481 states have (on average 1.3257411935894585) internal successors, (65599), 49863 states have internal predecessors, (65599), 15801 states have call successors, (15801), 4333 states have call predecessors, (15801), 4668 states have return successors, (16559), 15934 states have call predecessors, (16559), 15799 states have call successors, (16559) [2021-11-25 17:49:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69951 states to 69951 states and 97959 transitions. [2021-11-25 17:49:47,165 INFO L78 Accepts]: Start accepts. Automaton has 69951 states and 97959 transitions. Word has length 199 [2021-11-25 17:49:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:49:47,166 INFO L470 AbstractCegarLoop]: Abstraction has 69951 states and 97959 transitions. [2021-11-25 17:49:47,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 9.0) internal successors, (90), 11 states have internal predecessors, (90), 4 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 17:49:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 69951 states and 97959 transitions. [2021-11-25 17:49:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-25 17:49:47,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:49:47,188 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:49:47,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:49:47,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:49:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:49:47,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1948881409, now seen corresponding path program 1 times [2021-11-25 17:49:47,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:49:47,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473508975] [2021-11-25 17:49:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:49:47,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms