./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta --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 c0e62a2f55ddaeb08563a2d9bb0bfed8d8d740037b0faa92e9ebf8fe89adc120 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:17:17,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:17:17,602 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:17:17,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:17:17,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:17:17,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:17:17,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:17:17,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:17:17,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:17:17,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:17:17,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:17:17,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:17:17,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:17:17,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:17:17,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:17:17,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:17:17,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:17:17,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:17:17,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:17:17,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:17:17,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:17:17,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:17:17,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:17:17,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:17:17,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:17:17,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:17:17,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:17:17,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:17:17,681 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:17:17,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:17:17,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:17:17,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:17:17,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:17:17,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:17:17,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:17:17,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:17:17,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:17:17,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:17:17,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:17:17,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:17:17,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:17:17,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:17:17,719 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:17:17,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:17:17,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:17:17,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:17:17,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:17:17,722 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:17:17,722 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:17:17,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:17:17,722 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:17:17,723 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:17:17,723 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:17:17,723 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:17:17,723 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:17:17,724 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:17:17,724 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:17:17,724 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:17:17,725 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:17:17,725 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:17:17,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:17:17,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:17:17,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:17:17,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:17:17,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:17:17,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:17:17,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:17:17,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:17:17,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:17:17,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:17:17,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:17:17,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:17,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:17:17,730 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:17:17,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:17:17,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:17:17,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:17:17,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:17:17,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:17:17,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:17:17,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0e62a2f55ddaeb08563a2d9bb0bfed8d8d740037b0faa92e9ebf8fe89adc120 [2022-10-17 17:17:18,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:17:18,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:17:18,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:17:18,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:17:18,047 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:17:18,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2022-10-17 17:17:18,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/data/cf86e4908/0e0d9250ef6c47f4924a4ca2c5a95094/FLAGa86773b66 [2022-10-17 17:17:18,786 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:17:18,786 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2022-10-17 17:17:18,810 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/data/cf86e4908/0e0d9250ef6c47f4924a4ca2c5a95094/FLAGa86773b66 [2022-10-17 17:17:18,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/data/cf86e4908/0e0d9250ef6c47f4924a4ca2c5a95094 [2022-10-17 17:17:18,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:17:18,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:17:18,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:18,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:17:18,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:17:18,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:18" (1/1) ... [2022-10-17 17:17:18,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49287268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:18, skipping insertion in model container [2022-10-17 17:17:18,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:18" (1/1) ... [2022-10-17 17:17:19,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:17:19,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:17:19,572 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2022-10-17 17:17:19,574 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2022-10-17 17:17:19,690 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_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2022-10-17 17:17:19,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:19,872 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:17:19,922 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [1764] [2022-10-17 17:17:19,922 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [1765-1766] [2022-10-17 17:17:19,933 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_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i[52456,52469] [2022-10-17 17:17:20,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:20,088 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:17:20,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20 WrapperNode [2022-10-17 17:17:20,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:20,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:20,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:17:20,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:17:20,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,158 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,203 INFO L138 Inliner]: procedures = 114, calls = 288, calls flagged for inlining = 49, calls inlined = 38, statements flattened = 878 [2022-10-17 17:17:20,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:20,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:17:20,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:17:20,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:17:20,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,263 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:17:20,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:17:20,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:17:20,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:17:20,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (1/1) ... [2022-10-17 17:17:20,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:20,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:17:20,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:17:20,371 INFO L130 BoogieDeclarations]: Found specification of procedure _torture_stop_kthread [2022-10-17 17:17:20,371 INFO L138 BoogieDeclarations]: Found implementation of procedure _torture_stop_kthread [2022-10-17 17:17:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_lock [2022-10-17 17:17:20,372 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_lock [2022-10-17 17:17:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:17:20,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:17:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:17:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_delay [2022-10-17 17:17:20,373 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_delay [2022-10-17 17:17:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-10-17 17:17:20,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-10-17 17:17:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:17:20,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:17:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure _torture_create_kthread [2022-10-17 17:17:20,374 INFO L138 BoogieDeclarations]: Found implementation of procedure _torture_create_kthread [2022-10-17 17:17:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_lock [2022-10-17 17:17:20,374 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_lock [2022-10-17 17:17:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-10-17 17:17:20,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-10-17 17:17:20,375 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 17:17:20,375 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 17:17:20,375 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_spin_write_unlock_irq [2022-10-17 17:17:20,375 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_spin_write_unlock_irq [2022-10-17 17:17:20,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:17:20,375 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:17:20,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:17:20,376 INFO L130 BoogieDeclarations]: Found specification of procedure torture_random [2022-10-17 17:17:20,376 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_random [2022-10-17 17:17:20,376 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_cleanup [2022-10-17 17:17:20,376 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_cleanup [2022-10-17 17:17:20,376 INFO L130 BoogieDeclarations]: Found specification of procedure torture_init_end [2022-10-17 17:17:20,377 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_init_end [2022-10-17 17:17:20,377 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:17:20,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:17:20,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:17:20,377 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2022-10-17 17:17:20,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2022-10-17 17:17:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:17:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-10-17 17:17:20,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-10-17 17:17:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:17:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:17:20,378 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_stats_print [2022-10-17 17:17:20,379 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_stats_print [2022-10-17 17:17:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:17:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-10-17 17:17:20,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-10-17 17:17:20,379 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_lock_irq [2022-10-17 17:17:20,379 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_lock_irq [2022-10-17 17:17:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:17:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:17:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_delay [2022-10-17 17:17:20,380 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_delay [2022-10-17 17:17:20,380 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-10-17 17:17:20,380 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-10-17 17:17:20,381 INFO L130 BoogieDeclarations]: Found specification of procedure torture_lock_busted_write_unlock [2022-10-17 17:17:20,381 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_lock_busted_write_unlock [2022-10-17 17:17:20,381 INFO L130 BoogieDeclarations]: Found specification of procedure lock_torture_print_module_parms [2022-10-17 17:17:20,381 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_torture_print_module_parms [2022-10-17 17:17:20,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:17:20,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 17:17:20,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 17:17:20,382 INFO L130 BoogieDeclarations]: Found specification of procedure torture_spin_lock_write_unlock [2022-10-17 17:17:20,382 INFO L138 BoogieDeclarations]: Found implementation of procedure torture_spin_lock_write_unlock [2022-10-17 17:17:20,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:17:20,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:17:20,611 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:17:20,614 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:17:20,855 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:17:21,876 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:17:22,161 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:17:22,161 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:17:22,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:22 BoogieIcfgContainer [2022-10-17 17:17:22,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:17:22,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:17:22,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:17:22,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:17:22,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:17:18" (1/3) ... [2022-10-17 17:17:22,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4c149b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:22, skipping insertion in model container [2022-10-17 17:17:22,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:20" (2/3) ... [2022-10-17 17:17:22,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4c149b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:22, skipping insertion in model container [2022-10-17 17:17:22,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:22" (3/3) ... [2022-10-17 17:17:22,175 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-kernel--locking--locktorture.ko-entry_point.cil.out.i [2022-10-17 17:17:22,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:17:22,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:17:22,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:17:22,263 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d999847, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:17:22,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:17:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 175 states have (on average 1.497142857142857) internal successors, (262), 191 states have internal predecessors, (262), 61 states have call successors, (61), 27 states have call predecessors, (61), 26 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-10-17 17:17:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 17:17:22,285 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:22,285 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:22,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:22,292 INFO L85 PathProgramCache]: Analyzing trace with hash -25296481, now seen corresponding path program 1 times [2022-10-17 17:17:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:22,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309759157] [2022-10-17 17:17:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:17:22,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:22,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309759157] [2022-10-17 17:17:22,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309759157] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:22,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:22,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:22,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198310939] [2022-10-17 17:17:22,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:22,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:22,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:22,883 INFO L87 Difference]: Start difference. First operand has 264 states, 175 states have (on average 1.497142857142857) internal successors, (262), 191 states have internal predecessors, (262), 61 states have call successors, (61), 27 states have call predecessors, (61), 26 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:17:23,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:23,151 INFO L93 Difference]: Finished difference Result 703 states and 1018 transitions. [2022-10-17 17:17:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:23,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-10-17 17:17:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:23,171 INFO L225 Difference]: With dead ends: 703 [2022-10-17 17:17:23,171 INFO L226 Difference]: Without dead ends: 409 [2022-10-17 17:17:23,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:23,182 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 345 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:23,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 626 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-10-17 17:17:23,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2022-10-17 17:17:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 279 states have (on average 1.4480286738351253) internal successors, (404), 290 states have internal predecessors, (404), 86 states have call successors, (86), 45 states have call predecessors, (86), 40 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-10-17 17:17:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 571 transitions. [2022-10-17 17:17:23,274 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 571 transitions. Word has length 41 [2022-10-17 17:17:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:23,274 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 571 transitions. [2022-10-17 17:17:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:17:23,275 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 571 transitions. [2022-10-17 17:17:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 17:17:23,281 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:23,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:23,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:17:23,282 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:23,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1927845195, now seen corresponding path program 1 times [2022-10-17 17:17:23,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375316349] [2022-10-17 17:17:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:17:23,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375316349] [2022-10-17 17:17:23,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375316349] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:23,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:23,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:23,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843239293] [2022-10-17 17:17:23,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:23,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:23,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:23,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:23,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:23,520 INFO L87 Difference]: Start difference. First operand 406 states and 571 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 17:17:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:23,823 INFO L93 Difference]: Finished difference Result 765 states and 1105 transitions. [2022-10-17 17:17:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:23,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-10-17 17:17:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:23,839 INFO L225 Difference]: With dead ends: 765 [2022-10-17 17:17:23,840 INFO L226 Difference]: Without dead ends: 741 [2022-10-17 17:17:23,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:23,847 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 333 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:23,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 664 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-10-17 17:17:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 707. [2022-10-17 17:17:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 504 states have (on average 1.4861111111111112) internal successors, (749), 524 states have internal predecessors, (749), 138 states have call successors, (138), 69 states have call predecessors, (138), 64 states have return successors, (134), 125 states have call predecessors, (134), 133 states have call successors, (134) [2022-10-17 17:17:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1021 transitions. [2022-10-17 17:17:23,927 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1021 transitions. Word has length 42 [2022-10-17 17:17:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:23,927 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 1021 transitions. [2022-10-17 17:17:23,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 17:17:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1021 transitions. [2022-10-17 17:17:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 17:17:23,933 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:23,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:23,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:17:23,934 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1850558137, now seen corresponding path program 1 times [2022-10-17 17:17:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292894185] [2022-10-17 17:17:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:17:24,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292894185] [2022-10-17 17:17:24,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292894185] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:24,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:24,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:24,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610439281] [2022-10-17 17:17:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:24,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:24,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:24,040 INFO L87 Difference]: Start difference. First operand 707 states and 1021 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:17:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:24,329 INFO L93 Difference]: Finished difference Result 1787 states and 2560 transitions. [2022-10-17 17:17:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:24,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-10-17 17:17:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:24,339 INFO L225 Difference]: With dead ends: 1787 [2022-10-17 17:17:24,339 INFO L226 Difference]: Without dead ends: 1095 [2022-10-17 17:17:24,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:24,343 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 314 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:24,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 664 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-10-17 17:17:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1063. [2022-10-17 17:17:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 743 states have (on average 1.4804845222072678) internal successors, (1100), 785 states have internal predecessors, (1100), 211 states have call successors, (211), 113 states have call predecessors, (211), 108 states have return successors, (208), 184 states have call predecessors, (208), 206 states have call successors, (208) [2022-10-17 17:17:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1519 transitions. [2022-10-17 17:17:24,443 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1519 transitions. Word has length 55 [2022-10-17 17:17:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:24,444 INFO L495 AbstractCegarLoop]: Abstraction has 1063 states and 1519 transitions. [2022-10-17 17:17:24,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:17:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1519 transitions. [2022-10-17 17:17:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 17:17:24,449 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:24,449 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:17:24,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:17:24,449 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 619436933, now seen corresponding path program 1 times [2022-10-17 17:17:24,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:24,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461975844] [2022-10-17 17:17:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:17:24,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:24,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461975844] [2022-10-17 17:17:24,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461975844] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:24,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:24,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:24,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060077930] [2022-10-17 17:17:24,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:24,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:24,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:24,575 INFO L87 Difference]: Start difference. First operand 1063 states and 1519 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:17:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:24,884 INFO L93 Difference]: Finished difference Result 2751 states and 3916 transitions. [2022-10-17 17:17:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:24,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2022-10-17 17:17:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:24,897 INFO L225 Difference]: With dead ends: 2751 [2022-10-17 17:17:24,897 INFO L226 Difference]: Without dead ends: 1703 [2022-10-17 17:17:24,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:24,902 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 311 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:24,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 701 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-10-17 17:17:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1239. [2022-10-17 17:17:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 879 states have (on average 1.4823663253697383) internal successors, (1303), 924 states have internal predecessors, (1303), 233 states have call successors, (233), 131 states have call predecessors, (233), 126 states have return successors, (230), 206 states have call predecessors, (230), 228 states have call successors, (230) [2022-10-17 17:17:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1766 transitions. [2022-10-17 17:17:25,007 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1766 transitions. Word has length 58 [2022-10-17 17:17:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:25,008 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 1766 transitions. [2022-10-17 17:17:25,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:17:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1766 transitions. [2022-10-17 17:17:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-10-17 17:17:25,012 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:25,012 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-10-17 17:17:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:17:25,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash -433763711, now seen corresponding path program 1 times [2022-10-17 17:17:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:25,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292096022] [2022-10-17 17:17:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:17:25,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292096022] [2022-10-17 17:17:25,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292096022] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:25,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:25,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:17:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484548108] [2022-10-17 17:17:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:25,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:17:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:17:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:25,193 INFO L87 Difference]: Start difference. First operand 1239 states and 1766 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:17:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:25,447 INFO L93 Difference]: Finished difference Result 2413 states and 3442 transitions. [2022-10-17 17:17:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:17:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-10-17 17:17:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:25,458 INFO L225 Difference]: With dead ends: 2413 [2022-10-17 17:17:25,458 INFO L226 Difference]: Without dead ends: 1229 [2022-10-17 17:17:25,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:17:25,465 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 1 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:25,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 952 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-10-17 17:17:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1229. [2022-10-17 17:17:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 873 states have (on average 1.4719358533791524) internal successors, (1285), 916 states have internal predecessors, (1285), 229 states have call successors, (229), 131 states have call predecessors, (229), 126 states have return successors, (226), 204 states have call predecessors, (226), 224 states have call successors, (226) [2022-10-17 17:17:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 1740 transitions. [2022-10-17 17:17:25,598 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 1740 transitions. Word has length 64 [2022-10-17 17:17:25,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:25,599 INFO L495 AbstractCegarLoop]: Abstraction has 1229 states and 1740 transitions. [2022-10-17 17:17:25,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 17:17:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 1740 transitions. [2022-10-17 17:17:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-10-17 17:17:25,604 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:25,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-10-17 17:17:25,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:17:25,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:25,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:25,606 INFO L85 PathProgramCache]: Analyzing trace with hash -861698566, now seen corresponding path program 1 times [2022-10-17 17:17:25,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:25,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060616494] [2022-10-17 17:17:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:17:25,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:25,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060616494] [2022-10-17 17:17:25,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060616494] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:25,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:25,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:17:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129352374] [2022-10-17 17:17:25,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:25,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:17:25,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:25,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:17:25,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:25,964 INFO L87 Difference]: Start difference. First operand 1229 states and 1740 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:26,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:26,440 INFO L93 Difference]: Finished difference Result 3003 states and 4261 transitions. [2022-10-17 17:17:26,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:17:26,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 98 [2022-10-17 17:17:26,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:26,454 INFO L225 Difference]: With dead ends: 3003 [2022-10-17 17:17:26,454 INFO L226 Difference]: Without dead ends: 1843 [2022-10-17 17:17:26,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:26,458 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 531 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:26,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 810 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:17:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-10-17 17:17:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1597. [2022-10-17 17:17:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1159 states have (on average 1.4728213977566869) internal successors, (1707), 1210 states have internal predecessors, (1707), 280 states have call successors, (280), 162 states have call predecessors, (280), 157 states have return successors, (277), 255 states have call predecessors, (277), 275 states have call successors, (277) [2022-10-17 17:17:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2264 transitions. [2022-10-17 17:17:26,571 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2264 transitions. Word has length 98 [2022-10-17 17:17:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:26,572 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2264 transitions. [2022-10-17 17:17:26,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2264 transitions. [2022-10-17 17:17:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-17 17:17:26,581 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:26,582 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:26,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:17:26,583 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:26,583 INFO L85 PathProgramCache]: Analyzing trace with hash -819767300, now seen corresponding path program 1 times [2022-10-17 17:17:26,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:26,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961200997] [2022-10-17 17:17:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:17:26,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:26,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961200997] [2022-10-17 17:17:26,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961200997] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:26,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:26,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:17:26,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129827585] [2022-10-17 17:17:26,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:26,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:17:26,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:17:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:26,885 INFO L87 Difference]: Start difference. First operand 1597 states and 2264 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:27,283 INFO L93 Difference]: Finished difference Result 3926 states and 5581 transitions. [2022-10-17 17:17:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:17:27,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2022-10-17 17:17:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:27,302 INFO L225 Difference]: With dead ends: 3926 [2022-10-17 17:17:27,302 INFO L226 Difference]: Without dead ends: 2398 [2022-10-17 17:17:27,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:27,308 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 314 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:27,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1099 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2022-10-17 17:17:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2151. [2022-10-17 17:17:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 1594 states have (on average 1.4711417816813048) internal successors, (2345), 1657 states have internal predecessors, (2345), 353 states have call successors, (353), 208 states have call predecessors, (353), 203 states have return successors, (350), 328 states have call predecessors, (350), 348 states have call successors, (350) [2022-10-17 17:17:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3048 transitions. [2022-10-17 17:17:27,480 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3048 transitions. Word has length 101 [2022-10-17 17:17:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:27,481 INFO L495 AbstractCegarLoop]: Abstraction has 2151 states and 3048 transitions. [2022-10-17 17:17:27,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3048 transitions. [2022-10-17 17:17:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-10-17 17:17:27,488 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:27,488 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:27,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:17:27,489 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1522842753, now seen corresponding path program 1 times [2022-10-17 17:17:27,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:27,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689268201] [2022-10-17 17:17:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:17:27,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:27,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689268201] [2022-10-17 17:17:27,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689268201] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:27,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121682944] [2022-10-17 17:17:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:27,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:27,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:27,898 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:27,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:17:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:28,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:17:28,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:17:28,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:17:28,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121682944] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:28,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:17:28,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-10-17 17:17:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774865324] [2022-10-17 17:17:28,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:28,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:17:28,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:17:28,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:17:28,266 INFO L87 Difference]: Start difference. First operand 2151 states and 3048 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:17:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:28,568 INFO L93 Difference]: Finished difference Result 4247 states and 6024 transitions. [2022-10-17 17:17:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:17:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 106 [2022-10-17 17:17:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:28,584 INFO L225 Difference]: With dead ends: 4247 [2022-10-17 17:17:28,584 INFO L226 Difference]: Without dead ends: 2155 [2022-10-17 17:17:28,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:17:28,591 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 3 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:28,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1238 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2022-10-17 17:17:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 2155. [2022-10-17 17:17:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 1594 states have (on average 1.4686323713927227) internal successors, (2341), 1659 states have internal predecessors, (2341), 357 states have call successors, (357), 208 states have call predecessors, (357), 203 states have return successors, (352), 330 states have call predecessors, (352), 350 states have call successors, (352) [2022-10-17 17:17:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3050 transitions. [2022-10-17 17:17:28,731 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3050 transitions. Word has length 106 [2022-10-17 17:17:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:28,731 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 3050 transitions. [2022-10-17 17:17:28,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:17:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3050 transitions. [2022-10-17 17:17:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:17:28,737 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:28,737 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:28,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:28,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:28,957 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:28,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2036956973, now seen corresponding path program 1 times [2022-10-17 17:17:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:28,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061625921] [2022-10-17 17:17:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:28,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-10-17 17:17:29,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:29,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061625921] [2022-10-17 17:17:29,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061625921] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:29,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:29,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:29,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156716795] [2022-10-17 17:17:29,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:29,206 INFO L87 Difference]: Start difference. First operand 2155 states and 3050 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:17:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:29,407 INFO L93 Difference]: Finished difference Result 4237 states and 5998 transitions. [2022-10-17 17:17:29,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 109 [2022-10-17 17:17:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:29,423 INFO L225 Difference]: With dead ends: 4237 [2022-10-17 17:17:29,423 INFO L226 Difference]: Without dead ends: 2151 [2022-10-17 17:17:29,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:29,431 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 327 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:29,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 310 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-10-17 17:17:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2151. [2022-10-17 17:17:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 1590 states have (on average 1.4647798742138365) internal successors, (2329), 1655 states have internal predecessors, (2329), 357 states have call successors, (357), 208 states have call predecessors, (357), 203 states have return successors, (352), 330 states have call predecessors, (352), 350 states have call successors, (352) [2022-10-17 17:17:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3038 transitions. [2022-10-17 17:17:29,592 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3038 transitions. Word has length 109 [2022-10-17 17:17:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:29,594 INFO L495 AbstractCegarLoop]: Abstraction has 2151 states and 3038 transitions. [2022-10-17 17:17:29,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:17:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3038 transitions. [2022-10-17 17:17:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-10-17 17:17:29,604 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:29,605 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:17:29,606 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 682360170, now seen corresponding path program 1 times [2022-10-17 17:17:29,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:29,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295285464] [2022-10-17 17:17:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:17:30,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295285464] [2022-10-17 17:17:30,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295285464] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448182052] [2022-10-17 17:17:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:30,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:30,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:30,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:30,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:17:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:30,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 991 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:17:30,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:17:30,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:17:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:17:30,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448182052] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:30,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:17:30,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-10-17 17:17:30,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725305419] [2022-10-17 17:17:30,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:30,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:17:30,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:30,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:17:30,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:17:30,979 INFO L87 Difference]: Start difference. First operand 2151 states and 3038 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 17:17:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:32,437 INFO L93 Difference]: Finished difference Result 7620 states and 10797 transitions. [2022-10-17 17:17:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:17:32,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 110 [2022-10-17 17:17:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:32,493 INFO L225 Difference]: With dead ends: 7620 [2022-10-17 17:17:32,494 INFO L226 Difference]: Without dead ends: 7596 [2022-10-17 17:17:32,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:17:32,499 INFO L413 NwaCegarLoop]: 823 mSDtfsCounter, 972 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:32,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1883 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 17:17:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2022-10-17 17:17:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 7125. [2022-10-17 17:17:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7125 states, 5360 states have (on average 1.4761194029850746) internal successors, (7912), 5557 states have internal predecessors, (7912), 1116 states have call successors, (1116), 653 states have call predecessors, (1116), 648 states have return successors, (1111), 1058 states have call predecessors, (1111), 1106 states have call successors, (1111) [2022-10-17 17:17:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7125 states to 7125 states and 10139 transitions. [2022-10-17 17:17:33,063 INFO L78 Accepts]: Start accepts. Automaton has 7125 states and 10139 transitions. Word has length 110 [2022-10-17 17:17:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:33,064 INFO L495 AbstractCegarLoop]: Abstraction has 7125 states and 10139 transitions. [2022-10-17 17:17:33,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 17:17:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 7125 states and 10139 transitions. [2022-10-17 17:17:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-10-17 17:17:33,078 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:33,079 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:33,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-10-17 17:17:33,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 17:17:33,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1904602400, now seen corresponding path program 1 times [2022-10-17 17:17:33,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:33,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749456329] [2022-10-17 17:17:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:33,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 17:17:33,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:33,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749456329] [2022-10-17 17:17:33,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749456329] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:33,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:33,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:17:33,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473088729] [2022-10-17 17:17:33,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:33,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:17:33,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:17:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:33,623 INFO L87 Difference]: Start difference. First operand 7125 states and 10139 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:17:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:34,193 INFO L93 Difference]: Finished difference Result 13273 states and 18946 transitions. [2022-10-17 17:17:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:17:34,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 111 [2022-10-17 17:17:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:34,276 INFO L225 Difference]: With dead ends: 13273 [2022-10-17 17:17:34,277 INFO L226 Difference]: Without dead ends: 6103 [2022-10-17 17:17:34,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:17:34,303 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 349 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:34,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 611 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:34,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6103 states. [2022-10-17 17:17:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6103 to 5705. [2022-10-17 17:17:34,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 4387 states have (on average 1.4568041942101664) internal successors, (6391), 4513 states have internal predecessors, (6391), 832 states have call successors, (832), 490 states have call predecessors, (832), 485 states have return successors, (827), 817 states have call predecessors, (827), 827 states have call successors, (827) [2022-10-17 17:17:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 8050 transitions. [2022-10-17 17:17:34,780 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 8050 transitions. Word has length 111 [2022-10-17 17:17:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:34,781 INFO L495 AbstractCegarLoop]: Abstraction has 5705 states and 8050 transitions. [2022-10-17 17:17:34,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-10-17 17:17:34,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 8050 transitions. [2022-10-17 17:17:34,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-10-17 17:17:34,800 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:34,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:34,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 17:17:34,801 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1881633993, now seen corresponding path program 1 times [2022-10-17 17:17:34,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:34,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756015804] [2022-10-17 17:17:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:17:35,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:35,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756015804] [2022-10-17 17:17:35,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756015804] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:35,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148918277] [2022-10-17 17:17:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:35,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:35,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:35,325 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:35,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:17:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:17:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:17:35,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:17:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:17:36,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148918277] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:36,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:17:36,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-10-17 17:17:36,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460998546] [2022-10-17 17:17:36,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:36,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:17:36,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:17:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:17:36,280 INFO L87 Difference]: Start difference. First operand 5705 states and 8050 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 17:17:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:38,167 INFO L93 Difference]: Finished difference Result 19667 states and 27885 transitions. [2022-10-17 17:17:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:17:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 116 [2022-10-17 17:17:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:38,283 INFO L225 Difference]: With dead ends: 19667 [2022-10-17 17:17:38,283 INFO L226 Difference]: Without dead ends: 19643 [2022-10-17 17:17:38,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-10-17 17:17:38,296 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 685 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:38,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1592 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 17:17:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19643 states. [2022-10-17 17:17:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19643 to 17085. [2022-10-17 17:17:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17085 states, 13295 states have (on average 1.467318540804814) internal successors, (19508), 13649 states have internal predecessors, (19508), 2388 states have call successors, (2388), 1406 states have call predecessors, (2388), 1401 states have return successors, (2383), 2373 states have call predecessors, (2383), 2383 states have call successors, (2383) [2022-10-17 17:17:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17085 states to 17085 states and 24279 transitions. [2022-10-17 17:17:39,691 INFO L78 Accepts]: Start accepts. Automaton has 17085 states and 24279 transitions. Word has length 116 [2022-10-17 17:17:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:39,692 INFO L495 AbstractCegarLoop]: Abstraction has 17085 states and 24279 transitions. [2022-10-17 17:17:39,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-10-17 17:17:39,693 INFO L276 IsEmpty]: Start isEmpty. Operand 17085 states and 24279 transitions. [2022-10-17 17:17:39,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-10-17 17:17:39,730 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:39,730 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:39,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:39,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c56c5af-4cee-4f40-9d4e-8519d3e1de08/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 17:17:39,949 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1714540969, now seen corresponding path program 1 times [2022-10-17 17:17:39,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:39,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041861688] [2022-10-17 17:17:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:39,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 17:17:40,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041861688] [2022-10-17 17:17:40,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041861688] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:40,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:40,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:17:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849818665] [2022-10-17 17:17:40,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:40,271 INFO L87 Difference]: Start difference. First operand 17085 states and 24279 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:42,308 INFO L93 Difference]: Finished difference Result 45246 states and 66377 transitions. [2022-10-17 17:17:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 117 [2022-10-17 17:17:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:42,465 INFO L225 Difference]: With dead ends: 45246 [2022-10-17 17:17:42,465 INFO L226 Difference]: Without dead ends: 28290 [2022-10-17 17:17:42,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:42,520 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 146 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:42,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 693 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:17:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28290 states. [2022-10-17 17:17:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28290 to 17087. [2022-10-17 17:17:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17087 states, 13297 states have (on average 1.4672482514852974) internal successors, (19510), 13651 states have internal predecessors, (19510), 2388 states have call successors, (2388), 1406 states have call predecessors, (2388), 1401 states have return successors, (2383), 2373 states have call predecessors, (2383), 2383 states have call successors, (2383) [2022-10-17 17:17:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17087 states to 17087 states and 24281 transitions. [2022-10-17 17:17:44,051 INFO L78 Accepts]: Start accepts. Automaton has 17087 states and 24281 transitions. Word has length 117 [2022-10-17 17:17:44,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:44,052 INFO L495 AbstractCegarLoop]: Abstraction has 17087 states and 24281 transitions. [2022-10-17 17:17:44,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 17087 states and 24281 transitions. [2022-10-17 17:17:44,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-10-17 17:17:44,088 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:44,088 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:44,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 17:17:44,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:44,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash -374494478, now seen corresponding path program 1 times [2022-10-17 17:17:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:44,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411232121] [2022-10-17 17:17:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-10-17 17:17:44,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:44,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411232121] [2022-10-17 17:17:44,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411232121] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:44,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:44,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:17:44,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50863745] [2022-10-17 17:17:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:44,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:17:44,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:17:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:17:44,717 INFO L87 Difference]: Start difference. First operand 17087 states and 24281 transitions. Second operand has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:45,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:45,013 INFO L93 Difference]: Finished difference Result 17187 states and 24403 transitions. [2022-10-17 17:17:45,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:17:45,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-10-17 17:17:45,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:45,015 INFO L225 Difference]: With dead ends: 17187 [2022-10-17 17:17:45,015 INFO L226 Difference]: Without dead ends: 0 [2022-10-17 17:17:45,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:17:45,061 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 193 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:45,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 510 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-17 17:17:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-17 17:17:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-17 17:17:45,067 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-10-17 17:17:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:45,067 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-17 17:17:45,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-10-17 17:17:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-17 17:17:45,068 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-17 17:17:45,071 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:17:45,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 17:17:45,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.