./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--input--gameport--gameport.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--input--gameport--gameport.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI --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 25e54376eacb2d0548e63287dfbc7c840529d47c5fe4674c2562ee16254781b6 --- 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-5e519f3 [2022-11-03 02:34:35,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:34:35,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:34:35,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:34:35,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:34:35,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:34:35,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:34:35,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:34:35,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:34:35,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:34:35,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:34:35,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:34:35,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:34:35,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:34:35,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:34:35,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:34:35,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:34:35,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:34:35,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:34:35,513 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:34:35,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:34:35,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:34:35,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:34:35,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:34:35,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:34:35,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:34:35,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:34:35,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:34:35,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:34:35,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:34:35,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:34:35,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:34:35,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:34:35,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:34:35,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:34:35,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:34:35,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:34:35,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:34:35,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:34:35,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:34:35,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:34:35,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:34:35,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:34:35,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:34:35,600 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:34:35,600 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:34:35,601 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:34:35,602 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:34:35,602 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:34:35,602 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:34:35,603 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:34:35,603 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:34:35,604 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:34:35,605 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:34:35,605 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:34:35,605 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:34:35,606 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:34:35,606 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:34:35,606 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:34:35,606 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:34:35,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:34:35,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:34:35,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:34:35,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:34:35,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:34:35,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:34:35,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:34:35,611 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:34:35,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:34:35,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:34:35,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:34:35,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:35,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:34:35,613 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:34:35,614 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:34:35,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:34:35,614 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:34:35,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:34:35,615 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:34:35,615 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:34:35,615 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_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25e54376eacb2d0548e63287dfbc7c840529d47c5fe4674c2562ee16254781b6 [2022-11-03 02:34:36,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:34:36,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:34:36,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:34:36,052 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:34:36,053 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:34:36,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--input--gameport--gameport.ko-entry_point.cil.out.i [2022-11-03 02:34:36,148 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/data/4d8d1034b/1611e3f9a506490299013b5cde634aae/FLAG49959605c [2022-11-03 02:34:37,060 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:34:37,061 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--input--gameport--gameport.ko-entry_point.cil.out.i [2022-11-03 02:34:37,093 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/data/4d8d1034b/1611e3f9a506490299013b5cde634aae/FLAG49959605c [2022-11-03 02:34:37,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/data/4d8d1034b/1611e3f9a506490299013b5cde634aae [2022-11-03 02:34:37,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:34:37,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:34:37,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:37,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:34:37,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:34:37,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:37,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb1405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:37, skipping insertion in model container [2022-11-03 02:34:37,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:34:37" (1/1) ... [2022-11-03 02:34:37,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:34:37,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:34:38,925 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--input--gameport--gameport.ko-entry_point.cil.out.i[133750,133763] [2022-11-03 02:34:38,965 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-03 02:34:38,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:39,024 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:34:39,382 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--input--gameport--gameport.ko-entry_point.cil.out.i[133750,133763] [2022-11-03 02:34:39,397 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-03 02:34:39,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:34:39,497 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:34:39,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39 WrapperNode [2022-11-03 02:34:39,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:34:39,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:39,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:34:39,499 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:34:39,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,689 INFO L138 Inliner]: procedures = 189, calls = 838, calls flagged for inlining = 80, calls inlined = 60, statements flattened = 1698 [2022-11-03 02:34:39,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:34:39,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:34:39,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:34:39,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:34:39,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,808 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:34:39,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:34:39,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:34:39,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:34:39,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (1/1) ... [2022-11-03 02:34:39,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:34:39,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:34:39,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:34:39,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_192e6d1d-bce5-479b-a620-af522d379792/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:34:39,943 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_set_drv [2022-11-03 02:34:39,944 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_set_drv [2022-11-03 02:34:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_destroy_port [2022-11-03 02:34:39,944 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_destroy_port [2022-11-03 02:34:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-11-03 02:34:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_2 [2022-11-03 02:34:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_2 [2022-11-03 02:34:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_add_port [2022-11-03 02:34:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_add_port [2022-11-03 02:34:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:34:39,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:34:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_bus_match [2022-11-03 02:34:39,946 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_bus_match [2022-11-03 02:34:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:34:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:34:39,946 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:34:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:34:39,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:34:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2022-11-03 02:34:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2022-11-03 02:34:39,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2022-11-03 02:34:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_read [2022-11-03 02:34:39,948 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_read [2022-11-03 02:34:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_driver_probe [2022-11-03 02:34:39,948 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_driver_probe [2022-11-03 02:34:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:34:39,949 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:34:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get_ns [2022-11-03 02:34:39,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get_ns [2022-11-03 02:34:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure old_gameport_measure_speed [2022-11-03 02:34:39,949 INFO L138 BoogieDeclarations]: Found implementation of procedure old_gameport_measure_speed [2022-11-03 02:34:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-11-03 02:34:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-11-03 02:34:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-03 02:34:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-03 02:34:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_on [2022-11-03 02:34:39,951 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_on [2022-11-03 02:34:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_open [2022-11-03 02:34:39,951 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_open [2022-11-03 02:34:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:34:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2022-11-03 02:34:39,951 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2022-11-03 02:34:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_driver_remove [2022-11-03 02:34:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_driver_remove [2022-11-03 02:34:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure device_release_driver [2022-11-03 02:34:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure device_release_driver [2022-11-03 02:34:39,954 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:34:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:34:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:34:39,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:34:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure __udelay [2022-11-03 02:34:39,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __udelay [2022-11-03 02:34:39,958 INFO L130 BoogieDeclarations]: Found specification of procedure description_show [2022-11-03 02:34:39,958 INFO L138 BoogieDeclarations]: Found implementation of procedure description_show [2022-11-03 02:34:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_find_driver [2022-11-03 02:34:39,959 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_find_driver [2022-11-03 02:34:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:34:39,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:34:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_disconnect_port [2022-11-03 02:34:39,960 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_disconnect_port [2022-11-03 02:34:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:34:39,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:34:39,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:34:39,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:34:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:34:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_2 [2022-11-03 02:34:39,961 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_2 [2022-11-03 02:34:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_save [2022-11-03 02:34:39,961 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_save [2022-11-03 02:34:39,961 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 02:34:39,962 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 02:34:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_remove_pending_events [2022-11-03 02:34:39,963 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_remove_pending_events [2022-11-03 02:34:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:34:39,963 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_free_event [2022-11-03 02:34:39,964 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_free_event [2022-11-03 02:34:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:34:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:34:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:34:39,964 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 02:34:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 02:34:39,965 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2022-11-03 02:34:39,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2022-11-03 02:34:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:34:39,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:34:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2022-11-03 02:34:39,967 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2022-11-03 02:34:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:34:39,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-03 02:34:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:34:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-03 02:34:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-03 02:34:39,969 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-03 02:34:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2022-11-03 02:34:39,969 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2022-11-03 02:34:39,969 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 02:34:39,970 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 02:34:39,970 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2022-11-03 02:34:39,970 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2022-11-03 02:34:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:34:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:34:39,971 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_measure_speed [2022-11-03 02:34:39,971 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_measure_speed [2022-11-03 02:34:39,972 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_close [2022-11-03 02:34:39,972 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_close [2022-11-03 02:34:39,972 INFO L130 BoogieDeclarations]: Found specification of procedure put_device [2022-11-03 02:34:39,972 INFO L138 BoogieDeclarations]: Found implementation of procedure put_device [2022-11-03 02:34:39,973 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-03 02:34:39,974 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-03 02:34:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-03 02:34:39,977 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-03 02:34:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-03 02:34:39,978 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-03 02:34:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:34:39,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-03 02:34:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-03 02:34:39,980 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-03 02:34:39,980 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-03 02:34:39,987 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-03 02:34:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:34:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure paravirt_read_tsc [2022-11-03 02:34:39,988 INFO L138 BoogieDeclarations]: Found implementation of procedure paravirt_read_tsc [2022-11-03 02:34:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:34:39,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:34:39,988 INFO L130 BoogieDeclarations]: Found specification of procedure gameport_handle_events [2022-11-03 02:34:39,989 INFO L138 BoogieDeclarations]: Found implementation of procedure gameport_handle_events [2022-11-03 02:34:40,603 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:34:40,611 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:34:41,067 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:34:42,196 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:34:42,612 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:34:42,613 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:34:42,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:42 BoogieIcfgContainer [2022-11-03 02:34:42,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:34:42,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:34:42,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:34:42,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:34:42,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:34:37" (1/3) ... [2022-11-03 02:34:42,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11dbc559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:42, skipping insertion in model container [2022-11-03 02:34:42,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:34:39" (2/3) ... [2022-11-03 02:34:42,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11dbc559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:34:42, skipping insertion in model container [2022-11-03 02:34:42,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:34:42" (3/3) ... [2022-11-03 02:34:42,625 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--input--gameport--gameport.ko-entry_point.cil.out.i [2022-11-03 02:34:42,645 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:34:42,645 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:34:42,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:34:42,716 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;@3de94302, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:34:42,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:34:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 536 states, 325 states have (on average 1.363076923076923) internal successors, (443), 350 states have internal predecessors, (443), 155 states have call successors, (155), 55 states have call predecessors, (155), 54 states have return successors, (147), 141 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-03 02:34:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-03 02:34:42,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:42,740 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:42,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:42,746 INFO L85 PathProgramCache]: Analyzing trace with hash 388712848, now seen corresponding path program 1 times [2022-11-03 02:34:42,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:42,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217229365] [2022-11-03 02:34:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:42,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-11-03 02:34:43,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:43,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217229365] [2022-11-03 02:34:43,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217229365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:43,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:43,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:43,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048396180] [2022-11-03 02:34:43,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:43,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:43,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:43,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:43,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:43,839 INFO L87 Difference]: Start difference. First operand has 536 states, 325 states have (on average 1.363076923076923) internal successors, (443), 350 states have internal predecessors, (443), 155 states have call successors, (155), 55 states have call predecessors, (155), 54 states have return successors, (147), 141 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 02:34:46,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:46,557 INFO L93 Difference]: Finished difference Result 1546 states and 2229 transitions. [2022-11-03 02:34:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 137 [2022-11-03 02:34:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:46,598 INFO L225 Difference]: With dead ends: 1546 [2022-11-03 02:34:46,610 INFO L226 Difference]: Without dead ends: 1000 [2022-11-03 02:34:46,628 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 [2022-11-03 02:34:46,632 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 677 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:46,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1454 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 159 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:34:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-11-03 02:34:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 996. [2022-11-03 02:34:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 612 states have (on average 1.3251633986928104) internal successors, (811), 642 states have internal predecessors, (811), 279 states have call successors, (279), 105 states have call predecessors, (279), 104 states have return successors, (278), 264 states have call predecessors, (278), 277 states have call successors, (278) [2022-11-03 02:34:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1368 transitions. [2022-11-03 02:34:46,855 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1368 transitions. Word has length 137 [2022-11-03 02:34:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:46,858 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1368 transitions. [2022-11-03 02:34:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 02:34:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1368 transitions. [2022-11-03 02:34:46,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-03 02:34:46,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:46,876 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:46,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:34:46,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash 863494154, now seen corresponding path program 1 times [2022-11-03 02:34:46,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:46,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973524086] [2022-11-03 02:34:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-11-03 02:34:47,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973524086] [2022-11-03 02:34:47,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973524086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:47,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:47,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:47,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319659246] [2022-11-03 02:34:47,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:47,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:47,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:47,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:47,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:47,297 INFO L87 Difference]: Start difference. First operand 996 states and 1368 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:34:49,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:49,916 INFO L93 Difference]: Finished difference Result 2941 states and 4156 transitions. [2022-11-03 02:34:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 140 [2022-11-03 02:34:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:49,935 INFO L225 Difference]: With dead ends: 2941 [2022-11-03 02:34:49,936 INFO L226 Difference]: Without dead ends: 1965 [2022-11-03 02:34:49,940 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 [2022-11-03 02:34:49,942 INFO L413 NwaCegarLoop]: 788 mSDtfsCounter, 669 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:49,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1411 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:34:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-11-03 02:34:50,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1960. [2022-11-03 02:34:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1205 states have (on average 1.325311203319502) internal successors, (1597), 1265 states have internal predecessors, (1597), 546 states have call successors, (546), 209 states have call predecessors, (546), 208 states have return successors, (589), 517 states have call predecessors, (589), 544 states have call successors, (589) [2022-11-03 02:34:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2732 transitions. [2022-11-03 02:34:50,115 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2732 transitions. Word has length 140 [2022-11-03 02:34:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:50,116 INFO L495 AbstractCegarLoop]: Abstraction has 1960 states and 2732 transitions. [2022-11-03 02:34:50,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 02:34:50,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2732 transitions. [2022-11-03 02:34:50,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 02:34:50,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:50,119 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:50,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:34:50,120 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:50,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:50,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1770520781, now seen corresponding path program 1 times [2022-11-03 02:34:50,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:50,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113204578] [2022-11-03 02:34:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:50,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-11-03 02:34:50,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:50,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113204578] [2022-11-03 02:34:50,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113204578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:50,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:50,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993968344] [2022-11-03 02:34:50,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:50,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:50,424 INFO L87 Difference]: Start difference. First operand 1960 states and 2732 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:34:52,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:53,150 INFO L93 Difference]: Finished difference Result 5754 states and 8000 transitions. [2022-11-03 02:34:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:34:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 148 [2022-11-03 02:34:53,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:53,176 INFO L225 Difference]: With dead ends: 5754 [2022-11-03 02:34:53,176 INFO L226 Difference]: Without dead ends: 3816 [2022-11-03 02:34:53,186 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 [2022-11-03 02:34:53,187 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 672 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:53,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1358 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:34:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2022-11-03 02:34:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3808. [2022-11-03 02:34:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 2333 states have (on average 1.3214744963566223) internal successors, (3083), 2453 states have internal predecessors, (3083), 1060 states have call successors, (1060), 415 states have call predecessors, (1060), 414 states have return successors, (1147), 1003 states have call predecessors, (1147), 1058 states have call successors, (1147) [2022-11-03 02:34:53,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 5290 transitions. [2022-11-03 02:34:53,473 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 5290 transitions. Word has length 148 [2022-11-03 02:34:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:53,474 INFO L495 AbstractCegarLoop]: Abstraction has 3808 states and 5290 transitions. [2022-11-03 02:34:53,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:34:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 5290 transitions. [2022-11-03 02:34:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:34:53,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:53,478 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:53,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:34:53,478 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash 877215576, now seen corresponding path program 1 times [2022-11-03 02:34:53,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:53,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100629021] [2022-11-03 02:34:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:53,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-11-03 02:34:53,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:53,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100629021] [2022-11-03 02:34:53,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100629021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:53,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:53,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:34:53,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87679607] [2022-11-03 02:34:53,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:34:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:53,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:34:53,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:34:53,927 INFO L87 Difference]: Start difference. First operand 3808 states and 5290 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:34:57,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:58,371 INFO L93 Difference]: Finished difference Result 13064 states and 18450 transitions. [2022-11-03 02:34:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:34:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 145 [2022-11-03 02:34:58,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:58,432 INFO L225 Difference]: With dead ends: 13064 [2022-11-03 02:34:58,433 INFO L226 Difference]: Without dead ends: 9286 [2022-11-03 02:34:58,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:34:58,454 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 1328 mSDsluCounter, 2627 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:58,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1328 Valid, 3289 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 981 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-03 02:34:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9286 states. [2022-11-03 02:34:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9286 to 9165. [2022-11-03 02:34:59,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9165 states, 5614 states have (on average 1.3257926612041324) internal successors, (7443), 5926 states have internal predecessors, (7443), 2549 states have call successors, (2549), 1002 states have call predecessors, (2549), 1001 states have return successors, (3038), 2396 states have call predecessors, (3038), 2547 states have call successors, (3038) [2022-11-03 02:34:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9165 states to 9165 states and 13030 transitions. [2022-11-03 02:34:59,232 INFO L78 Accepts]: Start accepts. Automaton has 9165 states and 13030 transitions. Word has length 145 [2022-11-03 02:34:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:59,233 INFO L495 AbstractCegarLoop]: Abstraction has 9165 states and 13030 transitions. [2022-11-03 02:34:59,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-11-03 02:34:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9165 states and 13030 transitions. [2022-11-03 02:34:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:34:59,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:59,238 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:34:59,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:34:59,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash -853463714, now seen corresponding path program 1 times [2022-11-03 02:34:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:34:59,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205927] [2022-11-03 02:34:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:34:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-11-03 02:34:59,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:34:59,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205927] [2022-11-03 02:34:59,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:59,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:59,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:34:59,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418467384] [2022-11-03 02:34:59,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:59,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:34:59,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:34:59,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:34:59,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:34:59,567 INFO L87 Difference]: Start difference. First operand 9165 states and 13030 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:35:02,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:03,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:03,213 INFO L93 Difference]: Finished difference Result 26476 states and 37497 transitions. [2022-11-03 02:35:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:03,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 160 [2022-11-03 02:35:03,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:03,363 INFO L225 Difference]: With dead ends: 26476 [2022-11-03 02:35:03,364 INFO L226 Difference]: Without dead ends: 17343 [2022-11-03 02:35:03,416 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 [2022-11-03 02:35:03,418 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 625 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:03,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 1528 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-03 02:35:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2022-11-03 02:35:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 17335. [2022-11-03 02:35:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17335 states, 10596 states have (on average 1.3185164212910532) internal successors, (13971), 11140 states have internal predecessors, (13971), 4789 states have call successors, (4789), 1950 states have call predecessors, (4789), 1949 states have return successors, (5722), 4524 states have call predecessors, (5722), 4787 states have call successors, (5722) [2022-11-03 02:35:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17335 states to 17335 states and 24482 transitions. [2022-11-03 02:35:04,883 INFO L78 Accepts]: Start accepts. Automaton has 17335 states and 24482 transitions. Word has length 160 [2022-11-03 02:35:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:04,884 INFO L495 AbstractCegarLoop]: Abstraction has 17335 states and 24482 transitions. [2022-11-03 02:35:04,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:35:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 17335 states and 24482 transitions. [2022-11-03 02:35:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-03 02:35:04,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:04,889 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:04,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:35:04,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:04,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:04,890 INFO L85 PathProgramCache]: Analyzing trace with hash -369728587, now seen corresponding path program 1 times [2022-11-03 02:35:04,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:04,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229208993] [2022-11-03 02:35:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:04,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-11-03 02:35:06,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:06,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229208993] [2022-11-03 02:35:06,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229208993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:06,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:06,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:35:06,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557850763] [2022-11-03 02:35:06,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:06,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:35:06,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:35:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:35:06,033 INFO L87 Difference]: Start difference. First operand 17335 states and 24482 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:35:08,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:09,715 INFO L93 Difference]: Finished difference Result 34878 states and 51174 transitions. [2022-11-03 02:35:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:35:09,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 175 [2022-11-03 02:35:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:09,837 INFO L225 Difference]: With dead ends: 34878 [2022-11-03 02:35:09,837 INFO L226 Difference]: Without dead ends: 17575 [2022-11-03 02:35:09,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:35:09,946 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 5 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:09,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1894 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:35:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17575 states. [2022-11-03 02:35:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17575 to 17503. [2022-11-03 02:35:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17503 states, 10692 states have (on average 1.3156565656565657) internal successors, (14067), 11212 states have internal predecessors, (14067), 4845 states have call successors, (4845), 1950 states have call predecessors, (4845), 1965 states have return successors, (5874), 4580 states have call predecessors, (5874), 4843 states have call successors, (5874) [2022-11-03 02:35:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17503 states to 17503 states and 24786 transitions. [2022-11-03 02:35:11,436 INFO L78 Accepts]: Start accepts. Automaton has 17503 states and 24786 transitions. Word has length 175 [2022-11-03 02:35:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:11,437 INFO L495 AbstractCegarLoop]: Abstraction has 17503 states and 24786 transitions. [2022-11-03 02:35:11,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-03 02:35:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17503 states and 24786 transitions. [2022-11-03 02:35:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:35:11,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:11,441 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-11-03 02:35:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:35:11,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:11,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1419611302, now seen corresponding path program 1 times [2022-11-03 02:35:11,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:11,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695836492] [2022-11-03 02:35:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-11-03 02:35:11,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695836492] [2022-11-03 02:35:11,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695836492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:11,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618061689] [2022-11-03 02:35:11,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:11,752 INFO L87 Difference]: Start difference. First operand 17503 states and 24786 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:35:14,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:16,166 INFO L93 Difference]: Finished difference Result 52150 states and 73789 transitions. [2022-11-03 02:35:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 179 [2022-11-03 02:35:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:16,409 INFO L225 Difference]: With dead ends: 52150 [2022-11-03 02:35:16,410 INFO L226 Difference]: Without dead ends: 34679 [2022-11-03 02:35:16,501 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 [2022-11-03 02:35:16,502 INFO L413 NwaCegarLoop]: 1003 mSDtfsCounter, 690 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1602 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:16,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1602 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:35:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34679 states. [2022-11-03 02:35:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34679 to 34671. [2022-11-03 02:35:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34671 states, 21132 states have (on average 1.3136002271436684) internal successors, (27759), 22172 states have internal predecessors, (27759), 9621 states have call successors, (9621), 3886 states have call predecessors, (9621), 3917 states have return successors, (11618), 9092 states have call predecessors, (11618), 9619 states have call successors, (11618) [2022-11-03 02:35:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34671 states to 34671 states and 48998 transitions. [2022-11-03 02:35:19,051 INFO L78 Accepts]: Start accepts. Automaton has 34671 states and 48998 transitions. Word has length 179 [2022-11-03 02:35:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:19,052 INFO L495 AbstractCegarLoop]: Abstraction has 34671 states and 48998 transitions. [2022-11-03 02:35:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:35:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34671 states and 48998 transitions. [2022-11-03 02:35:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 02:35:19,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:19,058 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2022-11-03 02:35:19,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:35:19,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:19,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1616367538, now seen corresponding path program 1 times [2022-11-03 02:35:19,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:19,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029668916] [2022-11-03 02:35:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:19,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-11-03 02:35:19,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029668916] [2022-11-03 02:35:19,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029668916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:19,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:19,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:19,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667162255] [2022-11-03 02:35:19,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:19,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:19,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:19,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:19,351 INFO L87 Difference]: Start difference. First operand 34671 states and 48998 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:35:22,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:24,381 INFO L93 Difference]: Finished difference Result 86626 states and 122481 transitions. [2022-11-03 02:35:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:24,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 174 [2022-11-03 02:35:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:24,710 INFO L225 Difference]: With dead ends: 86626 [2022-11-03 02:35:24,710 INFO L226 Difference]: Without dead ends: 51987 [2022-11-03 02:35:24,866 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 [2022-11-03 02:35:24,867 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 653 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:24,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1593 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-03 02:35:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51987 states. [2022-11-03 02:35:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51987 to 51979. [2022-11-03 02:35:27,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51979 states, 31772 states have (on average 1.3115636409417097) internal successors, (41671), 33332 states have internal predecessors, (41671), 14337 states have call successors, (14337), 5822 states have call predecessors, (14337), 5869 states have return successors, (17310), 13544 states have call predecessors, (17310), 14335 states have call successors, (17310) [2022-11-03 02:35:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51979 states to 51979 states and 73318 transitions. [2022-11-03 02:35:28,331 INFO L78 Accepts]: Start accepts. Automaton has 51979 states and 73318 transitions. Word has length 174 [2022-11-03 02:35:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:28,332 INFO L495 AbstractCegarLoop]: Abstraction has 51979 states and 73318 transitions. [2022-11-03 02:35:28,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-03 02:35:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 51979 states and 73318 transitions. [2022-11-03 02:35:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-03 02:35:28,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:28,336 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-11-03 02:35:28,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:35:28,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:28,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1556969961, now seen corresponding path program 1 times [2022-11-03 02:35:28,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:28,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314145588] [2022-11-03 02:35:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:28,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-11-03 02:35:28,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:28,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314145588] [2022-11-03 02:35:28,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314145588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:28,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:28,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:28,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528032872] [2022-11-03 02:35:28,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:28,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:28,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:28,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:28,719 INFO L87 Difference]: Start difference. First operand 51979 states and 73318 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:35:32,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:33,777 INFO L93 Difference]: Finished difference Result 103688 states and 146044 transitions. [2022-11-03 02:35:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:33,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 183 [2022-11-03 02:35:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:34,302 INFO L225 Difference]: With dead ends: 103688 [2022-11-03 02:35:34,303 INFO L226 Difference]: Without dead ends: 51741 [2022-11-03 02:35:34,462 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 [2022-11-03 02:35:34,462 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 693 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:34,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 631 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:35:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51741 states. [2022-11-03 02:35:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51741 to 51741. [2022-11-03 02:35:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51741 states, 31653 states have (on average 1.3089438599816763) internal successors, (41432), 33214 states have internal predecessors, (41432), 14217 states have call successors, (14217), 5822 states have call predecessors, (14217), 5870 states have return successors, (16999), 13424 states have call predecessors, (16999), 14215 states have call successors, (16999) [2022-11-03 02:35:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51741 states to 51741 states and 72648 transitions. [2022-11-03 02:35:38,007 INFO L78 Accepts]: Start accepts. Automaton has 51741 states and 72648 transitions. Word has length 183 [2022-11-03 02:35:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:38,010 INFO L495 AbstractCegarLoop]: Abstraction has 51741 states and 72648 transitions. [2022-11-03 02:35:38,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:35:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 51741 states and 72648 transitions. [2022-11-03 02:35:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-03 02:35:38,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:38,017 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-11-03 02:35:38,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:35:38,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 686644087, now seen corresponding path program 1 times [2022-11-03 02:35:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:38,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811408555] [2022-11-03 02:35:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:38,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-11-03 02:35:38,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:38,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811408555] [2022-11-03 02:35:38,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811408555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:38,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:38,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:38,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608510069] [2022-11-03 02:35:38,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:38,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:38,474 INFO L87 Difference]: Start difference. First operand 51741 states and 72648 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:35:41,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:43,746 INFO L93 Difference]: Finished difference Result 103210 states and 144702 transitions. [2022-11-03 02:35:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:43,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 184 [2022-11-03 02:35:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:44,092 INFO L225 Difference]: With dead ends: 103210 [2022-11-03 02:35:44,092 INFO L226 Difference]: Without dead ends: 51501 [2022-11-03 02:35:44,362 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 [2022-11-03 02:35:44,363 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 688 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:44,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 627 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:35:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51501 states. [2022-11-03 02:35:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51501 to 51501. [2022-11-03 02:35:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51501 states, 31533 states have (on average 1.306314020232772) internal successors, (41192), 33094 states have internal predecessors, (41192), 14097 states have call successors, (14097), 5822 states have call predecessors, (14097), 5870 states have return successors, (16687), 13304 states have call predecessors, (16687), 14095 states have call successors, (16687) [2022-11-03 02:35:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51501 states to 51501 states and 71976 transitions. [2022-11-03 02:35:47,906 INFO L78 Accepts]: Start accepts. Automaton has 51501 states and 71976 transitions. Word has length 184 [2022-11-03 02:35:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:47,907 INFO L495 AbstractCegarLoop]: Abstraction has 51501 states and 71976 transitions. [2022-11-03 02:35:47,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:35:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 51501 states and 71976 transitions. [2022-11-03 02:35:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 02:35:47,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:47,912 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2022-11-03 02:35:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:35:47,913 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:47,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1227450528, now seen corresponding path program 1 times [2022-11-03 02:35:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:47,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919618409] [2022-11-03 02:35:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-11-03 02:35:48,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:48,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919618409] [2022-11-03 02:35:48,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919618409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:48,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:48,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831031764] [2022-11-03 02:35:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:48,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:48,252 INFO L87 Difference]: Start difference. First operand 51501 states and 71976 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:35:51,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []