./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.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_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/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_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/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_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/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 aaab35a91d1712a4db1ee4982d280cf380b8393a76dde8325418650d577af40c --- 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 08:22:35,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:22:35,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:22:35,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:22:35,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:22:35,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:22:35,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:22:35,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:22:35,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:22:35,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:22:35,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:22:35,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:22:35,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:22:35,720 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:22:35,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:22:35,724 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:22:35,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:22:35,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:22:35,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:22:35,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:22:35,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:22:35,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:22:35,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:22:35,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:22:35,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:22:35,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:22:35,749 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:22:35,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:22:35,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:22:35,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:22:35,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:22:35,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:22:35,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:22:35,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:22:35,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:22:35,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:22:35,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:22:35,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:22:35,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:22:35,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:22:35,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:22:35,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 08:22:35,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:22:35,816 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:22:35,817 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:22:35,817 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:22:35,818 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:22:35,818 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:22:35,818 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:22:35,819 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:22:35,819 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:22:35,819 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:22:35,820 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:22:35,821 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:22:35,821 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:22:35,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:22:35,822 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:22:35,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:22:35,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:22:35,823 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:22:35,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:22:35,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:22:35,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:22:35,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:22:35,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:22:35,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:22:35,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:22:35,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:22:35,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:22:35,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:22:35,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:22:35,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:22:35,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:22:35,829 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:22:35,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:22:35,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:22:35,830 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:22:35,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:22:35,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:22:35,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:22:35,831 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_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aaab35a91d1712a4db1ee4982d280cf380b8393a76dde8325418650d577af40c [2022-11-19 08:22:36,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:22:36,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:22:36,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:22:36,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:22:36,137 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:22:36,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.cil.out.i [2022-11-19 08:22:36,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/data/8c2280b78/467ce6390b174817ae0cb60fd241a401/FLAG077cab5b9 [2022-11-19 08:22:37,072 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:22:37,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.cil.out.i [2022-11-19 08:22:37,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/data/8c2280b78/467ce6390b174817ae0cb60fd241a401/FLAG077cab5b9 [2022-11-19 08:22:37,555 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/data/8c2280b78/467ce6390b174817ae0cb60fd241a401 [2022-11-19 08:22:37,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:22:37,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:22:37,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:22:37,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:22:37,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:22:37,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:22:37" (1/1) ... [2022-11-19 08:22:37,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d045d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:37, skipping insertion in model container [2022-11-19 08:22:37,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:22:37" (1/1) ... [2022-11-19 08:22:37,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:22:37,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:22:38,824 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_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.cil.out.i[168234,168247] [2022-11-19 08:22:39,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:22:39,678 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:22:39,823 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_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.cil.out.i[168234,168247] [2022-11-19 08:22:40,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:22:40,184 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:22:40,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40 WrapperNode [2022-11-19 08:22:40,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:22:40,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:22:40,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:22:40,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:22:40,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,383 INFO L138 Inliner]: procedures = 246, calls = 1442, calls flagged for inlining = 122, calls inlined = 104, statements flattened = 2697 [2022-11-19 08:22:40,383 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:22:40,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:22:40,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:22:40,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:22:40,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,590 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:22:40,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:22:40,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:22:40,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:22:40,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (1/1) ... [2022-11-19 08:22:40,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:22:40,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:22:40,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:22:40,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:22:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-19 08:22:40,708 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-19 08:22:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-19 08:22:40,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2022-11-19 08:22:40,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 08:22:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:22:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 08:22:40,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 08:22:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-19 08:22:40,709 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-19 08:22:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 08:22:40,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 08:22:40,709 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_write16 [2022-11-19 08:22:40,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_write16 [2022-11-19 08:22:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-19 08:22:40,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-19 08:22:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_select_bank [2022-11-19 08:22:40,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_select_bank [2022-11-19 08:22:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_tx_timeout [2022-11-19 08:22:40,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_tx_timeout [2022-11-19 08:22:40,710 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 08:22:40,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 08:22:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 08:22:40,711 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 08:22:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite16 [2022-11-19 08:22:40,711 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite16 [2022-11-19 08:22:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:22:40,711 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:22:40,711 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 08:22:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 08:22:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2022-11-19 08:22:40,712 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2022-11-19 08:22:40,712 INFO L130 BoogieDeclarations]: Found specification of procedure dma_release_channel [2022-11-19 08:22:40,713 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_release_channel [2022-11-19 08:22:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 08:22:40,713 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 08:22:40,713 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2022-11-19 08:22:40,713 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2022-11-19 08:22:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_read16 [2022-11-19 08:22:40,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_read16 [2022-11-19 08:22:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:22:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~~dma_cookie_t~0 [2022-11-19 08:22:40,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~~dma_cookie_t~0 [2022-11-19 08:22:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:22:40,714 INFO L130 BoogieDeclarations]: Found specification of procedure dmaengine_prep_slave_sg [2022-11-19 08:22:40,715 INFO L138 BoogieDeclarations]: Found implementation of procedure dmaengine_prep_slave_sg [2022-11-19 08:22:40,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-19 08:22:40,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-19 08:22:40,716 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2022-11-19 08:22:40,717 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2022-11-19 08:22:40,717 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-19 08:22:40,718 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-19 08:22:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure __ks8842_start_new_rx_dma [2022-11-19 08:22:40,718 INFO L138 BoogieDeclarations]: Found implementation of procedure __ks8842_start_new_rx_dma [2022-11-19 08:22:40,718 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 08:22:40,718 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 08:22:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_resource [2022-11-19 08:22:40,719 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_resource [2022-11-19 08:22:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure sg_init_table [2022-11-19 08:22:40,719 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_init_table [2022-11-19 08:22:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:22:40,719 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-19 08:22:40,720 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-19 08:22:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:22:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_tx_fifo_space [2022-11-19 08:22:40,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_tx_fifo_space [2022-11-19 08:22:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_init [2022-11-19 08:22:40,720 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_init [2022-11-19 08:22:40,720 INFO L130 BoogieDeclarations]: Found specification of procedure dma_mapping_error [2022-11-19 08:22:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_mapping_error [2022-11-19 08:22:40,721 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-19 08:22:40,721 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-19 08:22:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 08:22:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 08:22:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 08:22:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 08:22:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 08:22:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-19 08:22:40,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-19 08:22:40,722 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 08:22:40,723 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 08:22:40,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 08:22:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_reset_hw [2022-11-19 08:22:40,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_reset_hw [2022-11-19 08:22:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:22:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-19 08:22:40,724 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-19 08:22:40,724 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-19 08:22:40,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-19 08:22:40,725 INFO L130 BoogieDeclarations]: Found specification of procedure __dma_request_channel [2022-11-19 08:22:40,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __dma_request_channel [2022-11-19 08:22:40,726 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_update_link_status [2022-11-19 08:22:40,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_update_link_status [2022-11-19 08:22:40,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 08:22:40,727 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 08:22:40,727 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-19 08:22:40,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-19 08:22:40,727 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_write8 [2022-11-19 08:22:40,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_write8 [2022-11-19 08:22:40,727 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_set_mac [2022-11-19 08:22:40,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_set_mac [2022-11-19 08:22:40,727 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_stop_dma [2022-11-19 08:22:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_stop_dma [2022-11-19 08:22:40,728 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2022-11-19 08:22:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2022-11-19 08:22:40,728 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_write_mac_addr [2022-11-19 08:22:40,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_write_mac_addr [2022-11-19 08:22:40,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:22:40,729 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 08:22:40,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 08:22:40,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:22:40,732 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_dealloc_dma_bufs [2022-11-19 08:22:40,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_dealloc_dma_bufs [2022-11-19 08:22:40,733 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_enable_rx [2022-11-19 08:22:40,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_enable_rx [2022-11-19 08:22:40,734 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2022-11-19 08:22:40,734 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2022-11-19 08:22:40,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:22:40,736 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-19 08:22:40,736 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-19 08:22:40,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:22:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-19 08:22:40,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-19 08:22:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2022-11-19 08:22:40,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2022-11-19 08:22:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2022-11-19 08:22:40,742 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2022-11-19 08:22:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_enable_tx [2022-11-19 08:22:40,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_enable_tx [2022-11-19 08:22:40,742 INFO L130 BoogieDeclarations]: Found specification of procedure __dma_cap_set [2022-11-19 08:22:40,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __dma_cap_set [2022-11-19 08:22:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_resume_dma [2022-11-19 08:22:40,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_resume_dma [2022-11-19 08:22:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 08:22:40,743 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 08:22:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure ks8842_enable_bits [2022-11-19 08:22:40,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ks8842_enable_bits [2022-11-19 08:22:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:22:40,743 INFO L130 BoogieDeclarations]: Found specification of procedure resource_size [2022-11-19 08:22:40,744 INFO L138 BoogieDeclarations]: Found implementation of procedure resource_size [2022-11-19 08:22:40,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:22:40,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:22:41,458 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:22:41,465 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:22:41,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 08:22:43,943 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:22:44,578 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:22:44,578 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 08:22:44,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:22:44 BoogieIcfgContainer [2022-11-19 08:22:44,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:22:44,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:22:44,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:22:44,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:22:44,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:22:37" (1/3) ... [2022-11-19 08:22:44,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca80fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:22:44, skipping insertion in model container [2022-11-19 08:22:44,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:22:40" (2/3) ... [2022-11-19 08:22:44,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca80fa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:22:44, skipping insertion in model container [2022-11-19 08:22:44,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:22:44" (3/3) ... [2022-11-19 08:22:44,590 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.cil.out.i [2022-11-19 08:22:44,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:22:44,609 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:22:44,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:22:44,711 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;@553bb85a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:22:44,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:22:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 704 states, 420 states have (on average 1.3047619047619048) internal successors, (548), 440 states have internal predecessors, (548), 220 states have call successors, (220), 63 states have call predecessors, (220), 62 states have return successors, (213), 210 states have call predecessors, (213), 213 states have call successors, (213) [2022-11-19 08:22:44,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 08:22:44,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:44,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:44,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1061627106, now seen corresponding path program 1 times [2022-11-19 08:22:44,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:44,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724840285] [2022-11-19 08:22:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:22:45,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724840285] [2022-11-19 08:22:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724840285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:45,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:22:45,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:22:45,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137507614] [2022-11-19 08:22:45,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:45,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:22:45,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:22:45,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:22:45,786 INFO L87 Difference]: Start difference. First operand has 704 states, 420 states have (on average 1.3047619047619048) internal successors, (548), 440 states have internal predecessors, (548), 220 states have call successors, (220), 63 states have call predecessors, (220), 62 states have return successors, (213), 210 states have call predecessors, (213), 213 states have call successors, (213) Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:22:50,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:50,148 INFO L93 Difference]: Finished difference Result 2775 states and 3907 transitions. [2022-11-19 08:22:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:22:50,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-19 08:22:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:50,187 INFO L225 Difference]: With dead ends: 2775 [2022-11-19 08:22:50,188 INFO L226 Difference]: Without dead ends: 2043 [2022-11-19 08:22:50,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:22:50,204 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 2229 mSDsluCounter, 2606 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 3673 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:50,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2331 Valid, 3673 Invalid, 2828 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [448 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 08:22:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2022-11-19 08:22:50,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 2040. [2022-11-19 08:22:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 1227 states have (on average 1.2689486552567237) internal successors, (1557), 1260 states have internal predecessors, (1557), 629 states have call successors, (629), 184 states have call predecessors, (629), 183 states have return successors, (628), 619 states have call predecessors, (628), 628 states have call successors, (628) [2022-11-19 08:22:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 2814 transitions. [2022-11-19 08:22:50,430 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 2814 transitions. Word has length 30 [2022-11-19 08:22:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:50,430 INFO L495 AbstractCegarLoop]: Abstraction has 2040 states and 2814 transitions. [2022-11-19 08:22:50,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 08:22:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 2814 transitions. [2022-11-19 08:22:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:22:50,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:50,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:50,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:22:50,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash 61683489, now seen corresponding path program 1 times [2022-11-19 08:22:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376563092] [2022-11-19 08:22:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:50,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:50,835 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 08:22:50,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:50,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376563092] [2022-11-19 08:22:50,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376563092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:50,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:22:50,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:22:50,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889663853] [2022-11-19 08:22:50,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:50,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:22:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:22:50,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:22:50,844 INFO L87 Difference]: Start difference. First operand 2040 states and 2814 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:22:51,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:51,872 INFO L93 Difference]: Finished difference Result 4073 states and 5654 transitions. [2022-11-19 08:22:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:22:51,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2022-11-19 08:22:51,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:51,908 INFO L225 Difference]: With dead ends: 4073 [2022-11-19 08:22:51,908 INFO L226 Difference]: Without dead ends: 4068 [2022-11-19 08:22:51,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:22:51,912 INFO L413 NwaCegarLoop]: 1056 mSDtfsCounter, 934 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 2951 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:51,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 2951 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:22:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2022-11-19 08:22:52,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 4056. [2022-11-19 08:22:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 2435 states have (on average 1.268993839835729) internal successors, (3090), 2501 states have internal predecessors, (3090), 1254 states have call successors, (1254), 367 states have call predecessors, (1254), 366 states have return successors, (1289), 1235 states have call predecessors, (1289), 1253 states have call successors, (1289) [2022-11-19 08:22:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 5633 transitions. [2022-11-19 08:22:52,198 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 5633 transitions. Word has length 38 [2022-11-19 08:22:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:52,199 INFO L495 AbstractCegarLoop]: Abstraction has 4056 states and 5633 transitions. [2022-11-19 08:22:52,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 08:22:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 5633 transitions. [2022-11-19 08:22:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 08:22:52,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:52,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:52,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:22:52,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash 104368848, now seen corresponding path program 1 times [2022-11-19 08:22:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:52,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808557707] [2022-11-19 08:22:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 08:22:52,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808557707] [2022-11-19 08:22:52,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808557707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:52,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:22:52,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:22:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167908433] [2022-11-19 08:22:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:22:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:22:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:22:52,550 INFO L87 Difference]: Start difference. First operand 4056 states and 5633 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:22:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:53,319 INFO L93 Difference]: Finished difference Result 9406 states and 12985 transitions. [2022-11-19 08:22:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:22:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2022-11-19 08:22:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:53,356 INFO L225 Difference]: With dead ends: 9406 [2022-11-19 08:22:53,356 INFO L226 Difference]: Without dead ends: 5357 [2022-11-19 08:22:53,374 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 08:22:53,375 INFO L413 NwaCegarLoop]: 897 mSDtfsCounter, 316 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:53,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1680 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:22:53,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5357 states. [2022-11-19 08:22:53,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5357 to 5316. [2022-11-19 08:22:53,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 3237 states have (on average 1.2767995057151684) internal successors, (4133), 3333 states have internal predecessors, (4133), 1571 states have call successors, (1571), 508 states have call predecessors, (1571), 507 states have return successors, (1606), 1522 states have call predecessors, (1606), 1570 states have call successors, (1606) [2022-11-19 08:22:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 7310 transitions. [2022-11-19 08:22:53,871 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 7310 transitions. Word has length 108 [2022-11-19 08:22:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:53,874 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 7310 transitions. [2022-11-19 08:22:53,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 08:22:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 7310 transitions. [2022-11-19 08:22:53,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-19 08:22:53,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:53,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:53,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:22:53,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:53,902 INFO L85 PathProgramCache]: Analyzing trace with hash 746597846, now seen corresponding path program 1 times [2022-11-19 08:22:53,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:53,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752638270] [2022-11-19 08:22:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:53,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-19 08:22:54,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:54,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752638270] [2022-11-19 08:22:54,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752638270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:54,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:22:54,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:22:54,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393470086] [2022-11-19 08:22:54,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:54,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:22:54,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:22:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:22:54,346 INFO L87 Difference]: Start difference. First operand 5316 states and 7310 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 08:22:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:55,300 INFO L93 Difference]: Finished difference Result 11633 states and 15958 transitions. [2022-11-19 08:22:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:22:55,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 198 [2022-11-19 08:22:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:55,338 INFO L225 Difference]: With dead ends: 11633 [2022-11-19 08:22:55,338 INFO L226 Difference]: Without dead ends: 6330 [2022-11-19 08:22:55,359 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 08:22:55,364 INFO L413 NwaCegarLoop]: 1350 mSDtfsCounter, 778 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:55,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 2178 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:22:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6330 states. [2022-11-19 08:22:55,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6330 to 6228. [2022-11-19 08:22:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 3804 states have (on average 1.2778654048370137) internal successors, (4861), 3912 states have internal predecessors, (4861), 1809 states have call successors, (1809), 615 states have call predecessors, (1809), 614 states have return successors, (1856), 1764 states have call predecessors, (1856), 1808 states have call successors, (1856) [2022-11-19 08:22:55,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 8526 transitions. [2022-11-19 08:22:55,773 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 8526 transitions. Word has length 198 [2022-11-19 08:22:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:55,773 INFO L495 AbstractCegarLoop]: Abstraction has 6228 states and 8526 transitions. [2022-11-19 08:22:55,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 08:22:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 8526 transitions. [2022-11-19 08:22:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-19 08:22:55,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:55,789 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:55,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:22:55,790 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:55,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1179188349, now seen corresponding path program 1 times [2022-11-19 08:22:55,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:55,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988541776] [2022-11-19 08:22:55,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:55,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-19 08:22:56,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:56,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988541776] [2022-11-19 08:22:56,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988541776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:56,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:22:56,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:22:56,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682596524] [2022-11-19 08:22:56,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:56,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:22:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:22:56,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:22:56,301 INFO L87 Difference]: Start difference. First operand 6228 states and 8526 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-19 08:22:57,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:57,321 INFO L93 Difference]: Finished difference Result 14271 states and 19537 transitions. [2022-11-19 08:22:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:22:57,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 205 [2022-11-19 08:22:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:57,382 INFO L225 Difference]: With dead ends: 14271 [2022-11-19 08:22:57,382 INFO L226 Difference]: Without dead ends: 8155 [2022-11-19 08:22:57,408 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 08:22:57,409 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 396 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:57,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1895 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:22:57,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2022-11-19 08:22:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 8090. [2022-11-19 08:22:57,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8090 states, 5030 states have (on average 1.2811133200795228) internal successors, (6444), 5166 states have internal predecessors, (6444), 2245 states have call successors, (2245), 815 states have call predecessors, (2245), 814 states have return successors, (2292), 2180 states have call predecessors, (2292), 2244 states have call successors, (2292) [2022-11-19 08:22:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8090 states to 8090 states and 10981 transitions. [2022-11-19 08:22:57,944 INFO L78 Accepts]: Start accepts. Automaton has 8090 states and 10981 transitions. Word has length 205 [2022-11-19 08:22:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:57,947 INFO L495 AbstractCegarLoop]: Abstraction has 8090 states and 10981 transitions. [2022-11-19 08:22:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-19 08:22:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 8090 states and 10981 transitions. [2022-11-19 08:22:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-19 08:22:57,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:57,972 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:57,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:22:57,973 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1901191876, now seen corresponding path program 1 times [2022-11-19 08:22:57,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:57,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485183465] [2022-11-19 08:22:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:57,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:22:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:22:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-19 08:22:58,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:22:58,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485183465] [2022-11-19 08:22:58,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485183465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:22:58,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:22:58,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:22:58,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141751028] [2022-11-19 08:22:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:22:58,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:22:58,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:22:58,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:22:58,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:22:58,352 INFO L87 Difference]: Start difference. First operand 8090 states and 10981 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 08:22:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:22:59,211 INFO L93 Difference]: Finished difference Result 12154 states and 16568 transitions. [2022-11-19 08:22:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:22:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 215 [2022-11-19 08:22:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:22:59,260 INFO L225 Difference]: With dead ends: 12154 [2022-11-19 08:22:59,260 INFO L226 Difference]: Without dead ends: 8106 [2022-11-19 08:22:59,281 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 08:22:59,283 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 4 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:22:59,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1672 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:22:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8106 states. [2022-11-19 08:22:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8106 to 8106. [2022-11-19 08:22:59,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8106 states, 5042 states have (on average 1.2804442681475605) internal successors, (6456), 5182 states have internal predecessors, (6456), 2245 states have call successors, (2245), 815 states have call predecessors, (2245), 818 states have return successors, (2296), 2180 states have call predecessors, (2296), 2244 states have call successors, (2296) [2022-11-19 08:22:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8106 states to 8106 states and 10997 transitions. [2022-11-19 08:22:59,824 INFO L78 Accepts]: Start accepts. Automaton has 8106 states and 10997 transitions. Word has length 215 [2022-11-19 08:22:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:22:59,827 INFO L495 AbstractCegarLoop]: Abstraction has 8106 states and 10997 transitions. [2022-11-19 08:22:59,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-19 08:22:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 8106 states and 10997 transitions. [2022-11-19 08:22:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-19 08:22:59,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:22:59,850 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:22:59,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:22:59,850 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:22:59,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:22:59,851 INFO L85 PathProgramCache]: Analyzing trace with hash -486993915, now seen corresponding path program 1 times [2022-11-19 08:22:59,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:22:59,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010502405] [2022-11-19 08:22:59,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:22:59,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-19 08:23:01,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:01,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010502405] [2022-11-19 08:23:01,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010502405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:01,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:01,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:23:01,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940672855] [2022-11-19 08:23:01,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:01,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:23:01,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:23:01,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:23:01,181 INFO L87 Difference]: Start difference. First operand 8106 states and 10997 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (29), 4 states have call predecessors, (29), 5 states have call successors, (29) [2022-11-19 08:23:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:06,568 INFO L93 Difference]: Finished difference Result 16528 states and 22488 transitions. [2022-11-19 08:23:06,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:23:06,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (29), 4 states have call predecessors, (29), 5 states have call successors, (29) Word has length 216 [2022-11-19 08:23:06,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:06,611 INFO L225 Difference]: With dead ends: 16528 [2022-11-19 08:23:06,611 INFO L226 Difference]: Without dead ends: 8534 [2022-11-19 08:23:06,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:23:06,641 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1492 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 3867 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 4664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 3867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:06,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1689 Valid, 2066 Invalid, 4664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 3867 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-19 08:23:06,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8534 states. [2022-11-19 08:23:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8534 to 8382. [2022-11-19 08:23:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8382 states, 5214 states have (on average 1.275795934023782) internal successors, (6652), 5358 states have internal predecessors, (6652), 2309 states have call successors, (2309), 839 states have call predecessors, (2309), 858 states have return successors, (2352), 2256 states have call predecessors, (2352), 2308 states have call successors, (2352) [2022-11-19 08:23:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8382 states to 8382 states and 11313 transitions. [2022-11-19 08:23:07,212 INFO L78 Accepts]: Start accepts. Automaton has 8382 states and 11313 transitions. Word has length 216 [2022-11-19 08:23:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:07,213 INFO L495 AbstractCegarLoop]: Abstraction has 8382 states and 11313 transitions. [2022-11-19 08:23:07,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 8 states have internal predecessors, (120), 5 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (29), 4 states have call predecessors, (29), 5 states have call successors, (29) [2022-11-19 08:23:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8382 states and 11313 transitions. [2022-11-19 08:23:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-11-19 08:23:07,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:07,248 INFO L195 NwaCegarLoop]: trace histogram [30, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 9, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:07,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:23:07,249 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:07,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:07,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1637367360, now seen corresponding path program 1 times [2022-11-19 08:23:07,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:07,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276685300] [2022-11-19 08:23:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:07,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1824 trivial. 0 not checked. [2022-11-19 08:23:08,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:08,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276685300] [2022-11-19 08:23:08,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276685300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:08,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:08,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:08,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620597402] [2022-11-19 08:23:08,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:08,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:08,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:08,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:08,956 INFO L87 Difference]: Start difference. First operand 8382 states and 11313 transitions. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 4 states have internal predecessors, (187), 2 states have call successors, (70), 2 states have call predecessors, (70), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 08:23:10,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:10,237 INFO L93 Difference]: Finished difference Result 16722 states and 22596 transitions. [2022-11-19 08:23:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:10,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 4 states have internal predecessors, (187), 2 states have call successors, (70), 2 states have call predecessors, (70), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) Word has length 568 [2022-11-19 08:23:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:10,283 INFO L225 Difference]: With dead ends: 16722 [2022-11-19 08:23:10,283 INFO L226 Difference]: Without dead ends: 8452 [2022-11-19 08:23:10,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:10,318 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 2 mSDsluCounter, 2503 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3341 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:10,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3341 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:23:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2022-11-19 08:23:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8414. [2022-11-19 08:23:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8414 states, 5238 states have (on average 1.274532264222986) internal successors, (6676), 5382 states have internal predecessors, (6676), 2309 states have call successors, (2309), 839 states have call predecessors, (2309), 866 states have return successors, (2360), 2264 states have call predecessors, (2360), 2308 states have call successors, (2360) [2022-11-19 08:23:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8414 states to 8414 states and 11345 transitions. [2022-11-19 08:23:10,816 INFO L78 Accepts]: Start accepts. Automaton has 8414 states and 11345 transitions. Word has length 568 [2022-11-19 08:23:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:10,817 INFO L495 AbstractCegarLoop]: Abstraction has 8414 states and 11345 transitions. [2022-11-19 08:23:10,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 4 states have internal predecessors, (187), 2 states have call successors, (70), 2 states have call predecessors, (70), 3 states have return successors, (69), 3 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 08:23:10,817 INFO L276 IsEmpty]: Start isEmpty. Operand 8414 states and 11345 transitions. [2022-11-19 08:23:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-11-19 08:23:10,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:10,856 INFO L195 NwaCegarLoop]: trace histogram [30, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 9, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:10,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:23:10,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1375983151, now seen corresponding path program 1 times [2022-11-19 08:23:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310520338] [2022-11-19 08:23:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:10,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2022-11-19 08:23:14,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:14,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310520338] [2022-11-19 08:23:14,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310520338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:14,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031557494] [2022-11-19 08:23:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:14,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:14,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:14,290 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:14,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:23:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:15,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 5392 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:23:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2022-11-19 08:23:15,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:23:15,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031557494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:15,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:23:15,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-19 08:23:15,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366583421] [2022-11-19 08:23:15,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:15,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:23:15,896 INFO L87 Difference]: Start difference. First operand 8414 states and 11345 transitions. Second operand has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 3 states have call successors, (74), 2 states have call predecessors, (74), 2 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2022-11-19 08:23:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:17,773 INFO L93 Difference]: Finished difference Result 19872 states and 27527 transitions. [2022-11-19 08:23:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 3 states have call successors, (74), 2 states have call predecessors, (74), 2 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 572 [2022-11-19 08:23:17,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:17,828 INFO L225 Difference]: With dead ends: 19872 [2022-11-19 08:23:17,828 INFO L226 Difference]: Without dead ends: 11570 [2022-11-19 08:23:17,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:23:17,859 INFO L413 NwaCegarLoop]: 1221 mSDtfsCounter, 508 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 4279 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:17,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 4279 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:23:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11570 states. [2022-11-19 08:23:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11570 to 8454. [2022-11-19 08:23:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8454 states, 5270 states have (on average 1.272865275142315) internal successors, (6708), 5414 states have internal predecessors, (6708), 2317 states have call successors, (2317), 839 states have call predecessors, (2317), 866 states have return successors, (2368), 2272 states have call predecessors, (2368), 2316 states have call successors, (2368) [2022-11-19 08:23:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8454 states to 8454 states and 11393 transitions. [2022-11-19 08:23:18,611 INFO L78 Accepts]: Start accepts. Automaton has 8454 states and 11393 transitions. Word has length 572 [2022-11-19 08:23:18,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:18,616 INFO L495 AbstractCegarLoop]: Abstraction has 8454 states and 11393 transitions. [2022-11-19 08:23:18,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.8) internal successors, (199), 5 states have internal predecessors, (199), 3 states have call successors, (74), 2 states have call predecessors, (74), 2 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2022-11-19 08:23:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 8454 states and 11393 transitions. [2022-11-19 08:23:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-11-19 08:23:18,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:18,663 INFO L195 NwaCegarLoop]: trace histogram [30, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 9, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:18,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:18,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 08:23:18,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:18,881 INFO L85 PathProgramCache]: Analyzing trace with hash -595127960, now seen corresponding path program 1 times [2022-11-19 08:23:18,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:18,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39653595] [2022-11-19 08:23:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:18,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2022-11-19 08:23:22,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:22,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39653595] [2022-11-19 08:23:22,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39653595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:22,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753527108] [2022-11-19 08:23:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:22,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:22,067 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:22,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:23:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:23,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 5459 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:23:23,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1868 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 1690 trivial. 0 not checked. [2022-11-19 08:23:23,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:23:23,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753527108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:23,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:23:23,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-19 08:23:23,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888777576] [2022-11-19 08:23:23,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:23,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:23,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:23,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:23,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:23:23,751 INFO L87 Difference]: Start difference. First operand 8454 states and 11393 transitions. Second operand has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2022-11-19 08:23:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:25,756 INFO L93 Difference]: Finished difference Result 19952 states and 27623 transitions. [2022-11-19 08:23:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) Word has length 579 [2022-11-19 08:23:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:25,805 INFO L225 Difference]: With dead ends: 19952 [2022-11-19 08:23:25,805 INFO L226 Difference]: Without dead ends: 11610 [2022-11-19 08:23:25,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:23:25,833 INFO L413 NwaCegarLoop]: 1219 mSDtfsCounter, 508 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 4274 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:25,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 4274 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:23:25,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11610 states. [2022-11-19 08:23:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11610 to 8454. [2022-11-19 08:23:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8454 states, 5270 states have (on average 1.272865275142315) internal successors, (6708), 5414 states have internal predecessors, (6708), 2317 states have call successors, (2317), 839 states have call predecessors, (2317), 866 states have return successors, (2368), 2272 states have call predecessors, (2368), 2316 states have call successors, (2368) [2022-11-19 08:23:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8454 states to 8454 states and 11393 transitions. [2022-11-19 08:23:26,677 INFO L78 Accepts]: Start accepts. Automaton has 8454 states and 11393 transitions. Word has length 579 [2022-11-19 08:23:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:26,677 INFO L495 AbstractCegarLoop]: Abstraction has 8454 states and 11393 transitions. [2022-11-19 08:23:26,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 5 states have internal predecessors, (201), 3 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2022-11-19 08:23:26,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8454 states and 11393 transitions. [2022-11-19 08:23:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2022-11-19 08:23:26,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:26,716 INFO L195 NwaCegarLoop]: trace histogram [30, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:26,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:23:26,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:26,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1520396801, now seen corresponding path program 1 times [2022-11-19 08:23:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:26,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990135063] [2022-11-19 08:23:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1887 trivial. 0 not checked. [2022-11-19 08:23:29,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:29,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990135063] [2022-11-19 08:23:29,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990135063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:29,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329968920] [2022-11-19 08:23:29,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:29,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:29,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:29,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:30,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:23:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:31,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 5625 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:23:31,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-11-19 08:23:31,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:23:31,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329968920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:31,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:23:31,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-19 08:23:31,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777342430] [2022-11-19 08:23:31,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:31,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:23:31,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:31,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:23:31,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:23:31,582 INFO L87 Difference]: Start difference. First operand 8454 states and 11393 transitions. Second operand has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 2 states have call successors, (81), 2 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 2 states have call successors, (80) [2022-11-19 08:23:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:32,842 INFO L93 Difference]: Finished difference Result 17024 states and 22988 transitions. [2022-11-19 08:23:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:23:32,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 2 states have call successors, (81), 2 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 2 states have call successors, (80) Word has length 600 [2022-11-19 08:23:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:32,882 INFO L225 Difference]: With dead ends: 17024 [2022-11-19 08:23:32,882 INFO L226 Difference]: Without dead ends: 8682 [2022-11-19 08:23:32,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 599 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:23:32,911 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 11 mSDsluCounter, 3367 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 4214 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:32,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 4214 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:23:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2022-11-19 08:23:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 8610. [2022-11-19 08:23:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8610 states, 5382 states have (on average 1.2716462281679672) internal successors, (6844), 5538 states have internal predecessors, (6844), 2349 states have call successors, (2349), 839 states have call predecessors, (2349), 878 states have return successors, (2424), 2312 states have call predecessors, (2424), 2348 states have call successors, (2424) [2022-11-19 08:23:33,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8610 states to 8610 states and 11617 transitions. [2022-11-19 08:23:33,885 INFO L78 Accepts]: Start accepts. Automaton has 8610 states and 11617 transitions. Word has length 600 [2022-11-19 08:23:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:33,886 INFO L495 AbstractCegarLoop]: Abstraction has 8610 states and 11617 transitions. [2022-11-19 08:23:33,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.833333333333332) internal successors, (191), 5 states have internal predecessors, (191), 2 states have call successors, (81), 2 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 2 states have call successors, (80) [2022-11-19 08:23:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8610 states and 11617 transitions. [2022-11-19 08:23:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-11-19 08:23:33,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:33,924 INFO L195 NwaCegarLoop]: trace histogram [30, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:33,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:34,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:34,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:34,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:34,142 INFO L85 PathProgramCache]: Analyzing trace with hash 125491634, now seen corresponding path program 1 times [2022-11-19 08:23:34,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:34,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875103072] [2022-11-19 08:23:34,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:34,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1982 trivial. 0 not checked. [2022-11-19 08:23:36,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:36,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875103072] [2022-11-19 08:23:36,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875103072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:36,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579710749] [2022-11-19 08:23:36,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:36,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:36,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:36,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:23:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:38,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 5991 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:23:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:38,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-19 08:23:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2022-11-19 08:23:38,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:23:38,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579710749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:38,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:23:38,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-11-19 08:23:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953929242] [2022-11-19 08:23:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:38,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:23:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:23:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:23:38,514 INFO L87 Difference]: Start difference. First operand 8610 states and 11617 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2022-11-19 08:23:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:40,470 INFO L93 Difference]: Finished difference Result 17432 states and 23620 transitions. [2022-11-19 08:23:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:23:40,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) Word has length 650 [2022-11-19 08:23:40,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:40,509 INFO L225 Difference]: With dead ends: 17432 [2022-11-19 08:23:40,510 INFO L226 Difference]: Without dead ends: 8934 [2022-11-19 08:23:40,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:23:40,537 INFO L413 NwaCegarLoop]: 861 mSDtfsCounter, 13 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2458 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:40,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2458 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:23:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8934 states. [2022-11-19 08:23:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8934 to 8634. [2022-11-19 08:23:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 5406 states have (on average 1.270440251572327) internal successors, (6868), 5562 states have internal predecessors, (6868), 2349 states have call successors, (2349), 839 states have call predecessors, (2349), 878 states have return successors, (2424), 2312 states have call predecessors, (2424), 2348 states have call successors, (2424) [2022-11-19 08:23:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 11641 transitions. [2022-11-19 08:23:41,277 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 11641 transitions. Word has length 650 [2022-11-19 08:23:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:41,278 INFO L495 AbstractCegarLoop]: Abstraction has 8634 states and 11641 transitions. [2022-11-19 08:23:41,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 2 states have call successors, (82), 2 states have call predecessors, (82), 2 states have return successors, (81), 2 states have call predecessors, (81), 2 states have call successors, (81) [2022-11-19 08:23:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 11641 transitions. [2022-11-19 08:23:41,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2022-11-19 08:23:41,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:41,303 INFO L195 NwaCegarLoop]: trace histogram [30, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:41,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:41,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 08:23:41,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:41,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash 619748064, now seen corresponding path program 1 times [2022-11-19 08:23:41,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:41,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197871953] [2022-11-19 08:23:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:41,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1982 trivial. 0 not checked. [2022-11-19 08:23:44,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:44,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197871953] [2022-11-19 08:23:44,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197871953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:44,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131200016] [2022-11-19 08:23:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:44,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:44,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:44,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0da63f4d-f359-4e59-9d3b-bb9fe81ea5d5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:23:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:45,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 5998 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:23:45,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 255 proven. 16 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-11-19 08:23:47,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2011 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1981 trivial. 0 not checked. [2022-11-19 08:23:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131200016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:48,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571029092] [2022-11-19 08:23:48,514 INFO L159 IcfgInterpreter]: Started Sifa with 302 locations of interest [2022-11-19 08:23:48,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:48,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:48,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:48,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs