./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--pcmcia--pcmcia_rsrc.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--pcmcia--pcmcia_rsrc.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash bf300fda993e6da191f561c0f8e677f22a7de271b61b51439ca8ec3e0ecdedef --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:29:20,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:29:20,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:29:20,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:29:20,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:29:20,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:29:20,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:29:20,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:29:20,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:29:20,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:29:20,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:29:20,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:29:20,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:29:20,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:29:20,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:29:20,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:29:20,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:29:20,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:29:20,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:29:20,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:29:20,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:29:20,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:29:20,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:29:20,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:29:20,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:29:20,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:29:20,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:29:20,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:29:20,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:29:20,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:29:20,748 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:29:20,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:29:20,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:29:20,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:29:20,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:29:20,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:29:20,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:29:20,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:29:20,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:29:20,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:29:20,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:29:20,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:29:20,779 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:29:20,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:29:20,779 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:29:20,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:29:20,780 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:29:20,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:29:20,781 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:29:20,781 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:29:20,781 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:29:20,782 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:29:20,782 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:29:20,782 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:29:20,782 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:29:20,782 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:29:20,783 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:29:20,783 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:29:20,783 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:29:20,783 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:29:20,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:29:20,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:29:20,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:29:20,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:29:20,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:29:20,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:29:20,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:29:20,785 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:29:20,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:29:20,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:29:20,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:29:20,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:20,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:29:20,787 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:29:20,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:29:20,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:29:20,787 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:29:20,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:29:20,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:29:20,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:29:20,788 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_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bf300fda993e6da191f561c0f8e677f22a7de271b61b51439ca8ec3e0ecdedef [2022-11-19 07:29:21,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:29:21,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:29:21,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:29:21,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:29:21,076 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:29:21,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--pcmcia--pcmcia_rsrc.ko-main.cil.out.i [2022-11-19 07:29:21,162 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/data/928d89061/11d833f7930e4aa08063a7f2214d6af3/FLAGbbf8445f2 [2022-11-19 07:29:21,955 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:29:21,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--pcmcia--pcmcia_rsrc.ko-main.cil.out.i [2022-11-19 07:29:21,996 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/data/928d89061/11d833f7930e4aa08063a7f2214d6af3/FLAGbbf8445f2 [2022-11-19 07:29:22,043 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/data/928d89061/11d833f7930e4aa08063a7f2214d6af3 [2022-11-19 07:29:22,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:29:22,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:29:22,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:22,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:29:22,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:29:22,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:22" (1/1) ... [2022-11-19 07:29:22,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190ce4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:22, skipping insertion in model container [2022-11-19 07:29:22,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:29:22" (1/1) ... [2022-11-19 07:29:22,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:29:22,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:29:23,255 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--pcmcia--pcmcia_rsrc.ko-main.cil.out.i[120339,120352] [2022-11-19 07:29:23,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:23,369 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:29:23,585 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--pcmcia--pcmcia_rsrc.ko-main.cil.out.i[120339,120352] [2022-11-19 07:29:23,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:29:23,665 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:29:23,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23 WrapperNode [2022-11-19 07:29:23,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:29:23,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:23,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:29:23,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:29:23,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,814 INFO L138 Inliner]: procedures = 152, calls = 634, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 1753 [2022-11-19 07:29:23,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:29:23,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:29:23,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:29:23,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:29:23,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:23,961 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:24,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:24,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:29:24,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:29:24,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:29:24,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:29:24,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (1/1) ... [2022-11-19 07:29:24,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:29:24,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:24,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:29:24,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:29:24,111 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-19 07:29:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-19 07:29:24,111 INFO L130 BoogieDeclarations]: Found specification of procedure pci_bus_alloc_resource [2022-11-19 07:29:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_bus_alloc_resource [2022-11-19 07:29:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure add_interval [2022-11-19 07:29:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure add_interval [2022-11-19 07:29:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:29:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure sub_interval [2022-11-19 07:29:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure sub_interval [2022-11-19 07:29:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:29:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:29:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_find_mem_region [2022-11-19 07:29:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_find_mem_region [2022-11-19 07:29:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:29:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:29:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure free_region [2022-11-19 07:29:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure free_region [2022-11-19 07:29:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:29:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 07:29:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 07:29:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure __nonstatic_adjust_io_region [2022-11-19 07:29:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure __nonstatic_adjust_io_region [2022-11-19 07:29:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:29:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:29:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:29:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:29:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_release_resource_db [2022-11-19 07:29:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_release_resource_db [2022-11-19 07:29:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure do_mem_probe [2022-11-19 07:29:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure do_mem_probe [2022-11-19 07:29:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_make_resource [2022-11-19 07:29:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_make_resource [2022-11-19 07:29:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:29:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:29:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_init [2022-11-19 07:29:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_init [2022-11-19 07:29:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure nonstatic_find_io [2022-11-19 07:29:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure nonstatic_find_io [2022-11-19 07:29:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:29:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-19 07:29:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-19 07:29:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure pccard_sysfs_add_rsrc [2022-11-19 07:29:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure pccard_sysfs_add_rsrc [2022-11-19 07:29:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:29:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure static_init [2022-11-19 07:29:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure static_init [2022-11-19 07:29:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:29:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:29:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure do_validate_mem [2022-11-19 07:29:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure do_validate_mem [2022-11-19 07:29:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_resource [2022-11-19 07:29:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_resource [2022-11-19 07:29:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_nonstatic_validate_mem [2022-11-19 07:29:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_nonstatic_validate_mem [2022-11-19 07:29:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:29:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure static_find_io [2022-11-19 07:29:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure static_find_io [2022-11-19 07:29:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure ioremap [2022-11-19 07:29:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ioremap [2022-11-19 07:29:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure show_mem_db [2022-11-19 07:29:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure show_mem_db [2022-11-19 07:29:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure adjust_io [2022-11-19 07:29:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure adjust_io [2022-11-19 07:29:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:29:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-19 07:29:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-19 07:29:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:29:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 07:29:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 07:29:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:29:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:29:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:29:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-19 07:29:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-11-19 07:29:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-11-19 07:29:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:29:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure resource_size [2022-11-19 07:29:24,124 INFO L138 BoogieDeclarations]: Found implementation of procedure resource_size [2022-11-19 07:29:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pccard_static_ops_release_6 [2022-11-19 07:29:24,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pccard_static_ops_release_6 [2022-11-19 07:29:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure adjust_memory [2022-11-19 07:29:24,124 INFO L138 BoogieDeclarations]: Found implementation of procedure adjust_memory [2022-11-19 07:29:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure adjust_resource [2022-11-19 07:29:24,125 INFO L138 BoogieDeclarations]: Found implementation of procedure adjust_resource [2022-11-19 07:29:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_pccard_static_ops_release_7 [2022-11-19 07:29:24,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_pccard_static_ops_release_7 [2022-11-19 07:29:24,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:29:24,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:29:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_ops_mutex_of_pcmcia_socket [2022-11-19 07:29:24,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_ops_mutex_of_pcmcia_socket [2022-11-19 07:29:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure claim_region [2022-11-19 07:29:24,126 INFO L138 BoogieDeclarations]: Found implementation of procedure claim_region [2022-11-19 07:29:24,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_ops_mutex_of_pcmcia_socket [2022-11-19 07:29:24,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_ops_mutex_of_pcmcia_socket [2022-11-19 07:29:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure show_io_db [2022-11-19 07:29:24,127 INFO L138 BoogieDeclarations]: Found implementation of procedure show_io_db [2022-11-19 07:29:24,663 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:29:24,665 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:29:26,618 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:29:27,272 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:29:27,272 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:29:27,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:27 BoogieIcfgContainer [2022-11-19 07:29:27,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:29:27,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:29:27,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:29:27,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:29:27,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:29:22" (1/3) ... [2022-11-19 07:29:27,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf67da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:27, skipping insertion in model container [2022-11-19 07:29:27,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:29:23" (2/3) ... [2022-11-19 07:29:27,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf67da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:29:27, skipping insertion in model container [2022-11-19 07:29:27,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:29:27" (3/3) ... [2022-11-19 07:29:27,291 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--pcmcia--pcmcia_rsrc.ko-main.cil.out.i [2022-11-19 07:29:27,309 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:29:27,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:29:27,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:29:27,407 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;@41c16fbb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:29:27,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:29:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 524 states, 357 states have (on average 1.4705882352941178) internal successors, (525), 366 states have internal predecessors, (525), 123 states have call successors, (123), 42 states have call predecessors, (123), 42 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-11-19 07:29:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 07:29:27,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:27,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:27,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1446288053, now seen corresponding path program 1 times [2022-11-19 07:29:27,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:27,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502342161] [2022-11-19 07:29:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:27,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:27,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:27,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502342161] [2022-11-19 07:29:27,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502342161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:27,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:27,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:27,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004558150] [2022-11-19 07:29:27,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:27,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:27,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:27,974 INFO L87 Difference]: Start difference. First operand has 524 states, 357 states have (on average 1.4705882352941178) internal successors, (525), 366 states have internal predecessors, (525), 123 states have call successors, (123), 42 states have call predecessors, (123), 42 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:28,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:28,734 INFO L93 Difference]: Finished difference Result 1556 states and 2343 transitions. [2022-11-19 07:29:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 07:29:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:28,765 INFO L225 Difference]: With dead ends: 1556 [2022-11-19 07:29:28,766 INFO L226 Difference]: Without dead ends: 1031 [2022-11-19 07:29:28,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:28,781 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 734 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:28,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1421 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:29:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-11-19 07:29:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1027. [2022-11-19 07:29:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 704 states have (on average 1.4616477272727273) internal successors, (1029), 713 states have internal predecessors, (1029), 240 states have call successors, (240), 83 states have call predecessors, (240), 82 states have return successors, (234), 234 states have call predecessors, (234), 234 states have call successors, (234) [2022-11-19 07:29:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1503 transitions. [2022-11-19 07:29:28,968 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1503 transitions. Word has length 16 [2022-11-19 07:29:28,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:28,968 INFO L495 AbstractCegarLoop]: Abstraction has 1027 states and 1503 transitions. [2022-11-19 07:29:28,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:28,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1503 transitions. [2022-11-19 07:29:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 07:29:28,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:28,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:28,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:29:28,972 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:28,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:28,972 INFO L85 PathProgramCache]: Analyzing trace with hash 643720658, now seen corresponding path program 1 times [2022-11-19 07:29:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:28,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978200574] [2022-11-19 07:29:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:28,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:29,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:29,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978200574] [2022-11-19 07:29:29,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978200574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:29,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:29,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:29,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575229332] [2022-11-19 07:29:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:29,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:29,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:29,134 INFO L87 Difference]: Start difference. First operand 1027 states and 1503 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:29,504 INFO L93 Difference]: Finished difference Result 1029 states and 1504 transitions. [2022-11-19 07:29:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:29,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 07:29:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:29,512 INFO L225 Difference]: With dead ends: 1029 [2022-11-19 07:29:29,515 INFO L226 Difference]: Without dead ends: 1026 [2022-11-19 07:29:29,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:29,517 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 745 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:29,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 651 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-11-19 07:29:29,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 1026. [2022-11-19 07:29:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 704 states have (on average 1.4602272727272727) internal successors, (1028), 712 states have internal predecessors, (1028), 239 states have call successors, (239), 83 states have call predecessors, (239), 82 states have return successors, (234), 234 states have call predecessors, (234), 234 states have call successors, (234) [2022-11-19 07:29:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1501 transitions. [2022-11-19 07:29:29,575 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1501 transitions. Word has length 18 [2022-11-19 07:29:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:29,576 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1501 transitions. [2022-11-19 07:29:29,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1501 transitions. [2022-11-19 07:29:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:29:29,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:29,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:29,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:29:29,578 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1260082268, now seen corresponding path program 1 times [2022-11-19 07:29:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:29,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381495697] [2022-11-19 07:29:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:29,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:29,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381495697] [2022-11-19 07:29:29,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381495697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:29,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:29,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:29,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319230548] [2022-11-19 07:29:29,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:29,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:29,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:29,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:29,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:29,657 INFO L87 Difference]: Start difference. First operand 1026 states and 1501 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:29:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:30,301 INFO L93 Difference]: Finished difference Result 2526 states and 3686 transitions. [2022-11-19 07:29:30,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-19 07:29:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:30,311 INFO L225 Difference]: With dead ends: 2526 [2022-11-19 07:29:30,311 INFO L226 Difference]: Without dead ends: 1501 [2022-11-19 07:29:30,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:30,325 INFO L413 NwaCegarLoop]: 784 mSDtfsCounter, 717 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:30,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1428 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:29:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-19 07:29:30,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1488. [2022-11-19 07:29:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1022 states have (on average 1.4579256360078279) internal successors, (1490), 1032 states have internal predecessors, (1490), 342 states have call successors, (342), 124 states have call predecessors, (342), 123 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-19 07:29:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 2169 transitions. [2022-11-19 07:29:30,418 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 2169 transitions. Word has length 23 [2022-11-19 07:29:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:30,419 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 2169 transitions. [2022-11-19 07:29:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:29:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 2169 transitions. [2022-11-19 07:29:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:29:30,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:30,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:30,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:29:30,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1519838635, now seen corresponding path program 1 times [2022-11-19 07:29:30,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:30,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534536447] [2022-11-19 07:29:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:30,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:30,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534536447] [2022-11-19 07:29:30,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534536447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:30,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:30,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:30,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123058957] [2022-11-19 07:29:30,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:30,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:30,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:30,521 INFO L87 Difference]: Start difference. First operand 1488 states and 2169 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:30,884 INFO L93 Difference]: Finished difference Result 1490 states and 2170 transitions. [2022-11-19 07:29:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-19 07:29:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:30,894 INFO L225 Difference]: With dead ends: 1490 [2022-11-19 07:29:30,894 INFO L226 Difference]: Without dead ends: 1487 [2022-11-19 07:29:30,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:30,902 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 742 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:30,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 649 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:29:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-11-19 07:29:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1487. [2022-11-19 07:29:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1022 states have (on average 1.4569471624266144) internal successors, (1489), 1031 states have internal predecessors, (1489), 341 states have call successors, (341), 124 states have call predecessors, (341), 123 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-19 07:29:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 2167 transitions. [2022-11-19 07:29:31,025 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 2167 transitions. Word has length 19 [2022-11-19 07:29:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:31,026 INFO L495 AbstractCegarLoop]: Abstraction has 1487 states and 2167 transitions. [2022-11-19 07:29:31,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 2167 transitions. [2022-11-19 07:29:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:29:31,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:31,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:31,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:29:31,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:31,029 INFO L85 PathProgramCache]: Analyzing trace with hash 129304885, now seen corresponding path program 1 times [2022-11-19 07:29:31,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:31,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430945574] [2022-11-19 07:29:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:31,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:31,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:31,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430945574] [2022-11-19 07:29:31,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430945574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:31,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:31,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:31,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720108996] [2022-11-19 07:29:31,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:31,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:31,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:31,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:31,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:31,105 INFO L87 Difference]: Start difference. First operand 1487 states and 2167 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:31,481 INFO L93 Difference]: Finished difference Result 1489 states and 2168 transitions. [2022-11-19 07:29:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:31,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-19 07:29:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:31,489 INFO L225 Difference]: With dead ends: 1489 [2022-11-19 07:29:31,489 INFO L226 Difference]: Without dead ends: 1486 [2022-11-19 07:29:31,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:31,491 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 739 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:31,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 647 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:29:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-11-19 07:29:31,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1486. [2022-11-19 07:29:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1022 states have (on average 1.455968688845401) internal successors, (1488), 1030 states have internal predecessors, (1488), 340 states have call successors, (340), 124 states have call predecessors, (340), 123 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2022-11-19 07:29:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2165 transitions. [2022-11-19 07:29:31,622 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2165 transitions. Word has length 20 [2022-11-19 07:29:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:31,622 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2165 transitions. [2022-11-19 07:29:31,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2165 transitions. [2022-11-19 07:29:31,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 07:29:31,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:31,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:31,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:29:31,624 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:31,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1344837739, now seen corresponding path program 1 times [2022-11-19 07:29:31,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:31,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450748943] [2022-11-19 07:29:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:31,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:31,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:31,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450748943] [2022-11-19 07:29:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450748943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:31,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:31,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:31,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932290060] [2022-11-19 07:29:31,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:31,690 INFO L87 Difference]: Start difference. First operand 1486 states and 2165 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:29:32,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:32,361 INFO L93 Difference]: Finished difference Result 3906 states and 5679 transitions. [2022-11-19 07:29:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:32,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-11-19 07:29:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:32,374 INFO L225 Difference]: With dead ends: 3906 [2022-11-19 07:29:32,374 INFO L226 Difference]: Without dead ends: 2421 [2022-11-19 07:29:32,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:32,380 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 711 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:32,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 1487 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:29:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-11-19 07:29:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2410. [2022-11-19 07:29:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 1658 states have (on average 1.4547647768395657) internal successors, (2412), 1670 states have internal predecessors, (2412), 546 states have call successors, (546), 206 states have call predecessors, (546), 205 states have return successors, (543), 543 states have call predecessors, (543), 543 states have call successors, (543) [2022-11-19 07:29:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3501 transitions. [2022-11-19 07:29:32,567 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3501 transitions. Word has length 25 [2022-11-19 07:29:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:32,567 INFO L495 AbstractCegarLoop]: Abstraction has 2410 states and 3501 transitions. [2022-11-19 07:29:32,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:29:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3501 transitions. [2022-11-19 07:29:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:29:32,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:32,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:32,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:29:32,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:32,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:32,570 INFO L85 PathProgramCache]: Analyzing trace with hash -286848680, now seen corresponding path program 1 times [2022-11-19 07:29:32,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:32,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792203852] [2022-11-19 07:29:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:32,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:32,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:32,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792203852] [2022-11-19 07:29:32,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792203852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:32,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:32,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:29:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734148405] [2022-11-19 07:29:32,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:32,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:32,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:32,635 INFO L87 Difference]: Start difference. First operand 2410 states and 3501 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:33,197 INFO L93 Difference]: Finished difference Result 5205 states and 7589 transitions. [2022-11-19 07:29:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:33,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-19 07:29:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:33,214 INFO L225 Difference]: With dead ends: 5205 [2022-11-19 07:29:33,214 INFO L226 Difference]: Without dead ends: 2791 [2022-11-19 07:29:33,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:33,224 INFO L413 NwaCegarLoop]: 734 mSDtfsCounter, 701 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:33,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 980 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:29:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2022-11-19 07:29:33,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2774. [2022-11-19 07:29:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 1902 states have (on average 1.4369085173501577) internal successors, (2733), 1919 states have internal predecessors, (2733), 621 states have call successors, (621), 258 states have call predecessors, (621), 250 states have return successors, (629), 610 states have call predecessors, (629), 617 states have call successors, (629) [2022-11-19 07:29:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 3983 transitions. [2022-11-19 07:29:33,453 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 3983 transitions. Word has length 21 [2022-11-19 07:29:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:33,454 INFO L495 AbstractCegarLoop]: Abstraction has 2774 states and 3983 transitions. [2022-11-19 07:29:33,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 3983 transitions. [2022-11-19 07:29:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 07:29:33,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:33,462 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:29:33,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:29:33,462 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:33,463 INFO L85 PathProgramCache]: Analyzing trace with hash -885215820, now seen corresponding path program 1 times [2022-11-19 07:29:33,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:33,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222215935] [2022-11-19 07:29:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:33,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:29:33,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:33,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222215935] [2022-11-19 07:29:33,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222215935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:33,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:33,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:33,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354318396] [2022-11-19 07:29:33,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:33,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:33,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:33,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:33,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:33,657 INFO L87 Difference]: Start difference. First operand 2774 states and 3983 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:29:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:34,277 INFO L93 Difference]: Finished difference Result 3160 states and 4479 transitions. [2022-11-19 07:29:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-11-19 07:29:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:34,293 INFO L225 Difference]: With dead ends: 3160 [2022-11-19 07:29:34,293 INFO L226 Difference]: Without dead ends: 2774 [2022-11-19 07:29:34,297 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 [2022-11-19 07:29:34,297 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 284 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:34,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1416 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:29:34,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2022-11-19 07:29:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2766. [2022-11-19 07:29:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 1897 states have (on average 1.4343700579862941) internal successors, (2721), 1915 states have internal predecessors, (2721), 618 states have call successors, (618), 257 states have call predecessors, (618), 250 states have return successors, (609), 607 states have call predecessors, (609), 609 states have call successors, (609) [2022-11-19 07:29:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3948 transitions. [2022-11-19 07:29:34,492 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3948 transitions. Word has length 46 [2022-11-19 07:29:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:34,493 INFO L495 AbstractCegarLoop]: Abstraction has 2766 states and 3948 transitions. [2022-11-19 07:29:34,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:29:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3948 transitions. [2022-11-19 07:29:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 07:29:34,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:34,501 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 07:29:34,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:29:34,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:34,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:34,502 INFO L85 PathProgramCache]: Analyzing trace with hash 822328291, now seen corresponding path program 1 times [2022-11-19 07:29:34,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:34,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856999081] [2022-11-19 07:29:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:34,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:29:34,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:34,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856999081] [2022-11-19 07:29:34,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856999081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:34,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:34,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:34,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282307600] [2022-11-19 07:29:34,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:34,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:34,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:34,671 INFO L87 Difference]: Start difference. First operand 2766 states and 3948 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:29:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:35,541 INFO L93 Difference]: Finished difference Result 7746 states and 11023 transitions. [2022-11-19 07:29:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2022-11-19 07:29:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:35,568 INFO L225 Difference]: With dead ends: 7746 [2022-11-19 07:29:35,568 INFO L226 Difference]: Without dead ends: 4981 [2022-11-19 07:29:35,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:35,579 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 703 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1502 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:29:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4981 states. [2022-11-19 07:29:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4981 to 4967. [2022-11-19 07:29:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 3398 states have (on average 1.4281930547380812) internal successors, (4853), 3432 states have internal predecessors, (4853), 1109 states have call successors, (1109), 470 states have call predecessors, (1109), 459 states have return successors, (1096), 1090 states have call predecessors, (1096), 1096 states have call successors, (1096) [2022-11-19 07:29:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 7058 transitions. [2022-11-19 07:29:35,973 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 7058 transitions. Word has length 89 [2022-11-19 07:29:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:35,973 INFO L495 AbstractCegarLoop]: Abstraction has 4967 states and 7058 transitions. [2022-11-19 07:29:35,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:29:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 7058 transitions. [2022-11-19 07:29:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:29:35,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:35,986 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 07:29:35,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:29:35,986 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:35,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:35,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1312397689, now seen corresponding path program 1 times [2022-11-19 07:29:35,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:35,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336878942] [2022-11-19 07:29:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:29:36,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:36,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336878942] [2022-11-19 07:29:36,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336878942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:29:36,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:29:36,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:29:36,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248134113] [2022-11-19 07:29:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:29:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:29:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:29:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:36,243 INFO L87 Difference]: Start difference. First operand 4967 states and 7058 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:29:37,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:37,574 INFO L93 Difference]: Finished difference Result 12794 states and 18184 transitions. [2022-11-19 07:29:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:29:37,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2022-11-19 07:29:37,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:37,633 INFO L225 Difference]: With dead ends: 12794 [2022-11-19 07:29:37,633 INFO L226 Difference]: Without dead ends: 7828 [2022-11-19 07:29:37,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:29:37,655 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 701 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:37,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 1765 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:29:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7828 states. [2022-11-19 07:29:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7828 to 7814. [2022-11-19 07:29:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 5345 states have (on average 1.4293732460243218) internal successors, (7640), 5401 states have internal predecessors, (7640), 1743 states have call successors, (1743), 744 states have call predecessors, (1743), 725 states have return successors, (1722), 1708 states have call predecessors, (1722), 1722 states have call successors, (1722) [2022-11-19 07:29:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 11105 transitions. [2022-11-19 07:29:38,307 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 11105 transitions. Word has length 91 [2022-11-19 07:29:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:38,308 INFO L495 AbstractCegarLoop]: Abstraction has 7814 states and 11105 transitions. [2022-11-19 07:29:38,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:29:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 11105 transitions. [2022-11-19 07:29:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-19 07:29:38,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:38,330 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:29:38,330 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash 252193307, now seen corresponding path program 1 times [2022-11-19 07:29:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:38,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991788657] [2022-11-19 07:29:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:29:40,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:40,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991788657] [2022-11-19 07:29:40,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991788657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:40,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495804960] [2022-11-19 07:29:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:40,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:40,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:40,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:40,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5857ce22-68d8-468e-9af8-a7801070e2a2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:29:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1509 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-19 07:29:41,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:42,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-19 07:29:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:29:42,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:30:11,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495804960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:11,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357747021] [2022-11-19 07:30:11,798 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-19 07:30:11,799 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:11,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:11,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:11,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:19,073 INFO L197 IcfgInterpreter]: Interpreting procedure pcmcia_nonstatic_validate_mem with input of size 230 for LOIs [2022-11-19 07:30:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:20,258 INFO L321 Elim1Store]: treesize reduction 251, result has 23.2 percent of original size [2022-11-19 07:30:20,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 282 treesize of output 251 [2022-11-19 07:30:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:20,550 INFO L321 Elim1Store]: treesize reduction 265, result has 23.6 percent of original size [2022-11-19 07:30:20,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 465 treesize of output 299 [2022-11-19 07:30:20,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:20,845 INFO L321 Elim1Store]: treesize reduction 402, result has 18.8 percent of original size [2022-11-19 07:30:20,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 255 [2022-11-19 07:30:20,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 07:30:21,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 07:30:28,947 INFO L197 IcfgInterpreter]: Interpreting procedure do_mem_probe with input of size 664 for LOIs [2022-11-19 07:31:00,673 WARN L233 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 4541 DAG size of output: 4398 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)