./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/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_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/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_0140a684-14f3-4b5e-80da-5204953f1d44/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 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d --- 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 02:09:26,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:09:26,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:09:26,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:09:26,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:09:26,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:09:26,519 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:09:26,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:09:26,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:09:26,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:09:26,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:09:26,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:09:26,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:09:26,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:09:26,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:09:26,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:09:26,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:09:26,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:09:26,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:09:26,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:09:26,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:09:26,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:09:26,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:09:26,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:09:26,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:09:26,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:09:26,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:09:26,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:09:26,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:09:26,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:09:26,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:09:26,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:09:26,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:09:26,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:09:26,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:09:26,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:09:26,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:09:26,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:09:26,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:09:26,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:09:26,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:09:26,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:09:26,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:09:26,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:09:26,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:09:26,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:09:26,609 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:09:26,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:09:26,610 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:09:26,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:09:26,610 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:09:26,610 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:09:26,611 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:09:26,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:09:26,611 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:09:26,611 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:09:26,611 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:09:26,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:09:26,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:09:26,612 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:09:26,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:09:26,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:09:26,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:09:26,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:09:26,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:09:26,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:09:26,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:09:26,614 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:09:26,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:09:26,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:09:26,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:09:26,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:09:26,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:09:26,615 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:09:26,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:09:26,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:09:26,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:09:26,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:09:26,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:09:26,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:09:26,616 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_0140a684-14f3-4b5e-80da-5204953f1d44/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d [2022-11-03 02:09:26,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:09:26,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:09:26,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:09:26,920 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:09:26,921 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:09:26,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:09:26,981 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/data/8b34e1f84/a3a9a4451a0b4cd691ef44a8c83f0278/FLAGa5809fad8 [2022-11-03 02:09:27,856 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:09:27,857 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:09:27,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/data/8b34e1f84/a3a9a4451a0b4cd691ef44a8c83f0278/FLAGa5809fad8 [2022-11-03 02:09:28,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/data/8b34e1f84/a3a9a4451a0b4cd691ef44a8c83f0278 [2022-11-03 02:09:28,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:09:28,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:09:28,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:09:28,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:09:28,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:09:28,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:09:28" (1/1) ... [2022-11-03 02:09:28,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fb59cda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:28, skipping insertion in model container [2022-11-03 02:09:28,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:09:28" (1/1) ... [2022-11-03 02:09:28,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:09:28,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:09:30,505 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_0140a684-14f3-4b5e-80da-5204953f1d44/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2022-11-03 02:09:30,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:09:30,676 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:09:31,084 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_0140a684-14f3-4b5e-80da-5204953f1d44/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2022-11-03 02:09:31,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:09:31,204 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:09:31,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31 WrapperNode [2022-11-03 02:09:31,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:09:31,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:09:31,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:09:31,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:09:31,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,476 INFO L138 Inliner]: procedures = 272, calls = 2460, calls flagged for inlining = 116, calls inlined = 95, statements flattened = 3935 [2022-11-03 02:09:31,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:09:31,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:09:31,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:09:31,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:09:31,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:09:31,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:09:31,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:09:31,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:09:31,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (1/1) ... [2022-11-03 02:09:31,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:09:31,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:09:31,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:09:31,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:09:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2022-11-03 02:09:31,861 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2022-11-03 02:09:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-03 02:09:31,861 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-03 02:09:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:09:31,862 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:09:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-03 02:09:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 02:09:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 02:09:31,862 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:09:31,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:09:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:09:31,863 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:09:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2022-11-03 02:09:31,863 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2022-11-03 02:09:31,863 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-03 02:09:31,863 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-03 02:09:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2022-11-03 02:09:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2022-11-03 02:09:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:09:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:09:31,864 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2022-11-03 02:09:31,864 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2022-11-03 02:09:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2022-11-03 02:09:31,865 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2022-11-03 02:09:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:09:31,865 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:09:31,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:09:31,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:09:31,866 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2022-11-03 02:09:31,866 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2022-11-03 02:09:31,866 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2022-11-03 02:09:31,866 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2022-11-03 02:09:31,867 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-03 02:09:31,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_imon_context [2022-11-03 02:09:31,867 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:09:31,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:09:31,867 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:09:31,868 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:09:31,868 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 02:09:31,868 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 02:09:31,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_driver_lock [2022-11-03 02:09:31,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_driver_lock [2022-11-03 02:09:31,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:09:31,869 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2022-11-03 02:09:31,869 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2022-11-03 02:09:31,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:09:31,869 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2022-11-03 02:09:31,869 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2022-11-03 02:09:31,870 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-03 02:09:31,870 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-03 02:09:31,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:09:31,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:09:31,870 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-03 02:09:31,870 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-03 02:09:31,870 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:09:31,870 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:09:31,870 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 02:09:31,871 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 02:09:31,871 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2022-11-03 02:09:31,871 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2022-11-03 02:09:31,871 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2022-11-03 02:09:31,871 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2022-11-03 02:09:31,871 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 02:09:31,871 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 02:09:31,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 02:09:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2022-11-03 02:09:31,872 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2022-11-03 02:09:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-03 02:09:31,872 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-03 02:09:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:09:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2022-11-03 02:09:31,872 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2022-11-03 02:09:31,872 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_group [2022-11-03 02:09:31,873 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_group [2022-11-03 02:09:31,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:09:31,873 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-03 02:09:31,873 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-03 02:09:31,873 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2022-11-03 02:09:31,873 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2022-11-03 02:09:31,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 02:09:31,873 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 02:09:31,873 INFO L130 BoogieDeclarations]: Found specification of procedure lcd_write [2022-11-03 02:09:31,873 INFO L138 BoogieDeclarations]: Found implementation of procedure lcd_write [2022-11-03 02:09:31,874 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:09:31,874 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:09:31,874 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 02:09:31,874 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 02:09:31,874 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-03 02:09:31,874 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-03 02:09:31,874 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:09:31,874 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:09:31,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:09:31,875 INFO L130 BoogieDeclarations]: Found specification of procedure usb_to_input_id [2022-11-03 02:09:31,875 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_to_input_id [2022-11-03 02:09:31,875 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2022-11-03 02:09:31,875 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2022-11-03 02:09:31,875 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2022-11-03 02:09:31,875 INFO L138 BoogieDeclarations]: Found implementation of procedure noop_llseek [2022-11-03 02:09:31,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:09:31,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:09:31,876 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:09:31,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:09:31,876 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2022-11-03 02:09:31,876 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2022-11-03 02:09:31,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:09:31,876 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2022-11-03 02:09:31,876 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2022-11-03 02:09:31,876 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:09:31,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:09:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2022-11-03 02:09:31,877 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2022-11-03 02:09:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-03 02:09:31,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_imon_context [2022-11-03 02:09:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-03 02:09:31,877 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-03 02:09:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:09:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2022-11-03 02:09:31,878 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2022-11-03 02:09:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:09:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2022-11-03 02:09:31,878 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2022-11-03 02:09:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-03 02:09:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-11-03 02:09:31,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-11-03 02:09:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2022-11-03 02:09:31,878 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2022-11-03 02:09:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2022-11-03 02:09:31,879 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2022-11-03 02:09:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:09:31,879 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:09:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_driver_lock [2022-11-03 02:09:31,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_driver_lock [2022-11-03 02:09:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2022-11-03 02:09:31,879 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2022-11-03 02:09:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure imon_find_endpoints [2022-11-03 02:09:31,879 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_find_endpoints [2022-11-03 02:09:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2022-11-03 02:09:31,880 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2022-11-03 02:09:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:09:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-03 02:09:31,880 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-03 02:09:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:09:31,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:09:32,569 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:09:32,574 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:09:33,103 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:09:38,670 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:09:39,592 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:09:39,592 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:09:39,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:39 BoogieIcfgContainer [2022-11-03 02:09:39,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:09:39,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:09:39,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:09:39,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:09:39,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:09:28" (1/3) ... [2022-11-03 02:09:39,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362b9373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:39, skipping insertion in model container [2022-11-03 02:09:39,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:09:31" (2/3) ... [2022-11-03 02:09:39,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@362b9373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:09:39, skipping insertion in model container [2022-11-03 02:09:39,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:09:39" (3/3) ... [2022-11-03 02:09:39,607 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2022-11-03 02:09:39,626 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:09:39,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:09:39,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:09:39,698 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;@26cb4249, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:09:39,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:09:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 533 states have (on average 1.3358348968105065) internal successors, (712), 555 states have internal predecessors, (712), 281 states have call successors, (281), 63 states have call predecessors, (281), 62 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) [2022-11-03 02:09:39,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-03 02:09:39,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:39,723 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:39,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash -805164949, now seen corresponding path program 1 times [2022-11-03 02:09:39,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:39,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890079104] [2022-11-03 02:09:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:39,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-03 02:09:40,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:40,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890079104] [2022-11-03 02:09:40,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890079104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:40,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:40,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:09:40,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448827071] [2022-11-03 02:09:40,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:40,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:09:40,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:09:40,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:09:40,870 INFO L87 Difference]: Start difference. First operand has 878 states, 533 states have (on average 1.3358348968105065) internal successors, (712), 555 states have internal predecessors, (712), 281 states have call successors, (281), 63 states have call predecessors, (281), 62 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:09:42,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:44,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:47,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:48,808 INFO L93 Difference]: Finished difference Result 2489 states and 3683 transitions. [2022-11-03 02:09:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:09:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 167 [2022-11-03 02:09:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:48,839 INFO L225 Difference]: With dead ends: 2489 [2022-11-03 02:09:48,839 INFO L226 Difference]: Without dead ends: 1632 [2022-11-03 02:09:48,851 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 02:09:48,854 INFO L413 NwaCegarLoop]: 1362 mSDtfsCounter, 1096 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:48,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 2473 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 277 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-11-03 02:09:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-11-03 02:09:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1618. [2022-11-03 02:09:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 992 states have (on average 1.3175403225806452) internal successors, (1307), 1013 states have internal predecessors, (1307), 505 states have call successors, (505), 121 states have call predecessors, (505), 120 states have return successors, (498), 495 states have call predecessors, (498), 498 states have call successors, (498) [2022-11-03 02:09:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 2310 transitions. [2022-11-03 02:09:49,070 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 2310 transitions. Word has length 167 [2022-11-03 02:09:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:49,075 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 2310 transitions. [2022-11-03 02:09:49,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:09:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 2310 transitions. [2022-11-03 02:09:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 02:09:49,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:49,081 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:49,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:09:49,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:49,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:49,082 INFO L85 PathProgramCache]: Analyzing trace with hash -887926802, now seen corresponding path program 1 times [2022-11-03 02:09:49,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253068658] [2022-11-03 02:09:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-03 02:09:49,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:49,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253068658] [2022-11-03 02:09:49,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253068658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:49,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:49,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:09:49,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970274705] [2022-11-03 02:09:49,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:49,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:09:49,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:49,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:09:49,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:09:49,759 INFO L87 Difference]: Start difference. First operand 1618 states and 2310 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, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:09:51,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:54,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:09:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:09:56,940 INFO L93 Difference]: Finished difference Result 3967 states and 5657 transitions. [2022-11-03 02:09:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:09:56,948 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, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 168 [2022-11-03 02:09:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:09:56,971 INFO L225 Difference]: With dead ends: 3967 [2022-11-03 02:09:56,971 INFO L226 Difference]: Without dead ends: 2389 [2022-11-03 02:09:56,978 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 02:09:56,986 INFO L413 NwaCegarLoop]: 1279 mSDtfsCounter, 594 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:09:56,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 2376 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-03 02:09:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-11-03 02:09:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2376. [2022-11-03 02:09:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1487 states have (on average 1.335574983187626) internal successors, (1986), 1508 states have internal predecessors, (1986), 705 states have call successors, (705), 184 states have call predecessors, (705), 183 states have return successors, (698), 695 states have call predecessors, (698), 698 states have call successors, (698) [2022-11-03 02:09:57,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3389 transitions. [2022-11-03 02:09:57,126 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3389 transitions. Word has length 168 [2022-11-03 02:09:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:09:57,129 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 3389 transitions. [2022-11-03 02:09:57,129 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, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:09:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3389 transitions. [2022-11-03 02:09:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 02:09:57,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:09:57,136 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:09:57,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:09:57,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:09:57,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:09:57,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1641378617, now seen corresponding path program 1 times [2022-11-03 02:09:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:09:57,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185704089] [2022-11-03 02:09:57,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:09:57,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:09:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:09:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-03 02:09:57,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:09:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185704089] [2022-11-03 02:09:57,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185704089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:09:57,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:09:57,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:09:57,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426189455] [2022-11-03 02:09:57,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:09:57,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:09:57,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:09:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:09:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:09:57,716 INFO L87 Difference]: Start difference. First operand 2376 states and 3389 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:09:59,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:02,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:04,873 INFO L93 Difference]: Finished difference Result 7007 states and 9989 transitions. [2022-11-03 02:10:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:04,880 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 166 [2022-11-03 02:10:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:04,906 INFO L225 Difference]: With dead ends: 7007 [2022-11-03 02:10:04,907 INFO L226 Difference]: Without dead ends: 4671 [2022-11-03 02:10:04,917 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 02:10:04,918 INFO L413 NwaCegarLoop]: 1441 mSDtfsCounter, 1137 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:04,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1137 Valid, 2543 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 269 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2022-11-03 02:10:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2022-11-03 02:10:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4663. [2022-11-03 02:10:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 2928 states have (on average 1.3346994535519126) internal successors, (3908), 2963 states have internal predecessors, (3908), 1369 states have call successors, (1369), 366 states have call predecessors, (1369), 365 states have return successors, (1362), 1357 states have call predecessors, (1362), 1362 states have call successors, (1362) [2022-11-03 02:10:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 6639 transitions. [2022-11-03 02:10:05,176 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 6639 transitions. Word has length 166 [2022-11-03 02:10:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:05,176 INFO L495 AbstractCegarLoop]: Abstraction has 4663 states and 6639 transitions. [2022-11-03 02:10:05,177 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:10:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 6639 transitions. [2022-11-03 02:10:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-03 02:10:05,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:05,180 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:05,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:10:05,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:05,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1984820609, now seen corresponding path program 1 times [2022-11-03 02:10:05,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:05,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226533029] [2022-11-03 02:10:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:05,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-03 02:10:05,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:05,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226533029] [2022-11-03 02:10:05,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226533029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:05,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:05,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:05,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764951809] [2022-11-03 02:10:05,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:05,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:05,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:05,574 INFO L87 Difference]: Start difference. First operand 4663 states and 6639 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:10:07,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:09,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:12,240 INFO L93 Difference]: Finished difference Result 13237 states and 18802 transitions. [2022-11-03 02:10:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:12,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 173 [2022-11-03 02:10:12,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:12,296 INFO L225 Difference]: With dead ends: 13237 [2022-11-03 02:10:12,296 INFO L226 Difference]: Without dead ends: 8614 [2022-11-03 02:10:12,315 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 02:10:12,316 INFO L413 NwaCegarLoop]: 1470 mSDtfsCounter, 1082 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 2564 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:12,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 2564 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 02:10:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8614 states. [2022-11-03 02:10:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8614 to 8601. [2022-11-03 02:10:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 5412 states have (on average 1.3318551367331855) internal successors, (7208), 5475 states have internal predecessors, (7208), 2499 states have call successors, (2499), 690 states have call predecessors, (2499), 689 states have return successors, (2492), 2483 states have call predecessors, (2492), 2492 states have call successors, (2492) [2022-11-03 02:10:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 12199 transitions. [2022-11-03 02:10:12,818 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 12199 transitions. Word has length 173 [2022-11-03 02:10:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:12,819 INFO L495 AbstractCegarLoop]: Abstraction has 8601 states and 12199 transitions. [2022-11-03 02:10:12,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2022-11-03 02:10:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 12199 transitions. [2022-11-03 02:10:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 02:10:12,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:12,823 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:12,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:10:12,824 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 996653791, now seen corresponding path program 1 times [2022-11-03 02:10:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:12,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956063248] [2022-11-03 02:10:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-03 02:10:13,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956063248] [2022-11-03 02:10:13,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956063248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:13,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:13,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:13,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341839551] [2022-11-03 02:10:13,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:13,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:13,191 INFO L87 Difference]: Start difference. First operand 8601 states and 12199 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:10:15,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:18,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:20,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:20,583 INFO L93 Difference]: Finished difference Result 24959 states and 35230 transitions. [2022-11-03 02:10:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 179 [2022-11-03 02:10:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:20,694 INFO L225 Difference]: With dead ends: 24959 [2022-11-03 02:10:20,694 INFO L226 Difference]: Without dead ends: 16398 [2022-11-03 02:10:20,730 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 02:10:20,731 INFO L413 NwaCegarLoop]: 1526 mSDtfsCounter, 1086 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:20,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 2629 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 1 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 02:10:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16398 states. [2022-11-03 02:10:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16398 to 16383. [2022-11-03 02:10:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16383 states, 10246 states have (on average 1.3220769080616825) internal successors, (13546), 10367 states have internal predecessors, (13546), 4759 states have call successors, (4759), 1378 states have call predecessors, (4759), 1377 states have return successors, (4752), 4733 states have call predecessors, (4752), 4752 states have call successors, (4752) [2022-11-03 02:10:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16383 states to 16383 states and 23057 transitions. [2022-11-03 02:10:21,642 INFO L78 Accepts]: Start accepts. Automaton has 16383 states and 23057 transitions. Word has length 179 [2022-11-03 02:10:21,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:21,643 INFO L495 AbstractCegarLoop]: Abstraction has 16383 states and 23057 transitions. [2022-11-03 02:10:21,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:10:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16383 states and 23057 transitions. [2022-11-03 02:10:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 02:10:21,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:21,647 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:21,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:10:21,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:21,648 INFO L85 PathProgramCache]: Analyzing trace with hash 664964423, now seen corresponding path program 1 times [2022-11-03 02:10:21,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:21,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10820026] [2022-11-03 02:10:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:21,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-11-03 02:10:22,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10820026] [2022-11-03 02:10:22,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10820026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:22,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:22,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117761607] [2022-11-03 02:10:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:22,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:22,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:22,127 INFO L87 Difference]: Start difference. First operand 16383 states and 23057 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:10:24,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:27,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:29,738 INFO L93 Difference]: Finished difference Result 47371 states and 66512 transitions. [2022-11-03 02:10:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:29,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 181 [2022-11-03 02:10:29,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:29,876 INFO L225 Difference]: With dead ends: 47371 [2022-11-03 02:10:29,877 INFO L226 Difference]: Without dead ends: 31028 [2022-11-03 02:10:30,083 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 02:10:30,084 INFO L413 NwaCegarLoop]: 1617 mSDtfsCounter, 1083 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:30,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1083 Valid, 2720 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 02:10:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31028 states. [2022-11-03 02:10:31,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31028 to 31011. [2022-11-03 02:10:31,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31011 states, 19356 states have (on average 1.3194874974168216) internal successors, (25540), 19593 states have internal predecessors, (25540), 8965 states have call successors, (8965), 2690 states have call predecessors, (8965), 2689 states have return successors, (8958), 8919 states have call predecessors, (8958), 8958 states have call successors, (8958) [2022-11-03 02:10:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31011 states to 31011 states and 43463 transitions. [2022-11-03 02:10:31,847 INFO L78 Accepts]: Start accepts. Automaton has 31011 states and 43463 transitions. Word has length 181 [2022-11-03 02:10:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:31,848 INFO L495 AbstractCegarLoop]: Abstraction has 31011 states and 43463 transitions. [2022-11-03 02:10:31,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:10:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 31011 states and 43463 transitions. [2022-11-03 02:10:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-03 02:10:31,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:31,853 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:31,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:10:31,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:31,854 INFO L85 PathProgramCache]: Analyzing trace with hash 533385216, now seen corresponding path program 1 times [2022-11-03 02:10:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:31,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768856555] [2022-11-03 02:10:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:31,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-03 02:10:32,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:32,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768856555] [2022-11-03 02:10:32,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768856555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:32,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:32,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772070980] [2022-11-03 02:10:32,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:32,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:32,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:32,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:32,299 INFO L87 Difference]: Start difference. First operand 31011 states and 43463 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:10:33,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:35,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:37,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:37,804 INFO L93 Difference]: Finished difference Result 34961 states and 47763 transitions. [2022-11-03 02:10:37,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:37,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 181 [2022-11-03 02:10:37,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:37,917 INFO L225 Difference]: With dead ends: 34961 [2022-11-03 02:10:37,917 INFO L226 Difference]: Without dead ends: 34957 [2022-11-03 02:10:37,928 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 02:10:37,929 INFO L413 NwaCegarLoop]: 1151 mSDtfsCounter, 737 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:37,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1643 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 02:10:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34957 states. [2022-11-03 02:10:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34957 to 34953. [2022-11-03 02:10:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34953 states, 21656 states have (on average 1.3039804211304027) internal successors, (28239), 21891 states have internal predecessors, (28239), 9733 states have call successors, (9733), 3564 states have call predecessors, (9733), 3563 states have return successors, (9728), 9689 states have call predecessors, (9728), 9728 states have call successors, (9728) [2022-11-03 02:10:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34953 states to 34953 states and 47700 transitions. [2022-11-03 02:10:39,866 INFO L78 Accepts]: Start accepts. Automaton has 34953 states and 47700 transitions. Word has length 181 [2022-11-03 02:10:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:39,867 INFO L495 AbstractCegarLoop]: Abstraction has 34953 states and 47700 transitions. [2022-11-03 02:10:39,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:10:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 34953 states and 47700 transitions. [2022-11-03 02:10:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-03 02:10:39,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:39,869 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:10:39,870 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -645328803, now seen corresponding path program 1 times [2022-11-03 02:10:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634398567] [2022-11-03 02:10:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:39,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-03 02:10:40,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:40,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634398567] [2022-11-03 02:10:40,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634398567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:40,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:40,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:40,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590786202] [2022-11-03 02:10:40,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:40,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:40,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:40,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:40,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:40,388 INFO L87 Difference]: Start difference. First operand 34953 states and 47700 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:10:42,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:45,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:48,295 INFO L93 Difference]: Finished difference Result 85999 states and 117048 transitions. [2022-11-03 02:10:48,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:48,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2022-11-03 02:10:48,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:48,515 INFO L225 Difference]: With dead ends: 85999 [2022-11-03 02:10:48,515 INFO L226 Difference]: Without dead ends: 51086 [2022-11-03 02:10:48,601 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 02:10:48,602 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 712 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:48,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 2189 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 254 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-03 02:10:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51086 states. [2022-11-03 02:10:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51086 to 50584. [2022-11-03 02:10:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50584 states, 31812 states have (on average 1.3105431912485854) internal successors, (41691), 32450 states have internal predecessors, (41691), 13313 states have call successors, (13313), 5608 states have call predecessors, (13313), 5458 states have return successors, (13562), 12781 states have call predecessors, (13562), 13306 states have call successors, (13562) [2022-11-03 02:10:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50584 states to 50584 states and 68566 transitions. [2022-11-03 02:10:51,316 INFO L78 Accepts]: Start accepts. Automaton has 50584 states and 68566 transitions. Word has length 182 [2022-11-03 02:10:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:10:51,318 INFO L495 AbstractCegarLoop]: Abstraction has 50584 states and 68566 transitions. [2022-11-03 02:10:51,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:10:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 50584 states and 68566 transitions. [2022-11-03 02:10:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-03 02:10:51,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:10:51,322 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:10:51,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:10:51,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:10:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:10:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1469247139, now seen corresponding path program 1 times [2022-11-03 02:10:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:10:51,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102773312] [2022-11-03 02:10:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:10:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:10:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:10:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-03 02:10:51,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:10:51,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102773312] [2022-11-03 02:10:51,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102773312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:10:51,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:10:51,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:10:51,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572975575] [2022-11-03 02:10:51,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:10:51,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:10:51,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:10:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:10:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:10:51,787 INFO L87 Difference]: Start difference. First operand 50584 states and 68566 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:10:53,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:10:57,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:10:57,573 INFO L93 Difference]: Finished difference Result 50586 states and 68567 transitions. [2022-11-03 02:10:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:10:57,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 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 02:10:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:10:57,792 INFO L225 Difference]: With dead ends: 50586 [2022-11-03 02:10:57,792 INFO L226 Difference]: Without dead ends: 50579 [2022-11-03 02:10:57,821 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 02:10:57,823 INFO L413 NwaCegarLoop]: 1106 mSDtfsCounter, 1182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:10:57,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 1106 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-03 02:10:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50579 states. [2022-11-03 02:11:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50579 to 50579. [2022-11-03 02:11:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50579 states, 31808 states have (on average 1.3090103118712273) internal successors, (41637), 32445 states have internal predecessors, (41637), 13312 states have call successors, (13312), 5608 states have call predecessors, (13312), 5458 states have return successors, (13562), 12781 states have call predecessors, (13562), 13306 states have call successors, (13562) [2022-11-03 02:11:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50579 states to 50579 states and 68511 transitions. [2022-11-03 02:11:00,604 INFO L78 Accepts]: Start accepts. Automaton has 50579 states and 68511 transitions. Word has length 183 [2022-11-03 02:11:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:00,606 INFO L495 AbstractCegarLoop]: Abstraction has 50579 states and 68511 transitions. [2022-11-03 02:11:00,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:11:00,606 INFO L276 IsEmpty]: Start isEmpty. Operand 50579 states and 68511 transitions. [2022-11-03 02:11:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-11-03 02:11:00,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:00,610 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:11:00,611 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1754593750, now seen corresponding path program 1 times [2022-11-03 02:11:00,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737808144] [2022-11-03 02:11:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-11-03 02:11:00,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:00,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737808144] [2022-11-03 02:11:00,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737808144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:00,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:00,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:11:00,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823191807] [2022-11-03 02:11:00,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:01,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:11:01,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:01,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:11:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:11:01,001 INFO L87 Difference]: Start difference. First operand 50579 states and 68511 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:11:03,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:06,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:08,916 INFO L93 Difference]: Finished difference Result 76303 states and 103324 transitions. [2022-11-03 02:11:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:11:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 247 [2022-11-03 02:11:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:09,011 INFO L225 Difference]: With dead ends: 76303 [2022-11-03 02:11:09,011 INFO L226 Difference]: Without dead ends: 25748 [2022-11-03 02:11:09,113 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 02:11:09,114 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 6 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:09,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2210 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-03 02:11:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25748 states. [2022-11-03 02:11:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25748 to 25519. [2022-11-03 02:11:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25519 states, 16030 states have (on average 1.311353711790393) internal successors, (21021), 16357 states have internal predecessors, (21021), 6722 states have call successors, (6722), 2842 states have call predecessors, (6722), 2766 states have return successors, (6844), 6447 states have call predecessors, (6844), 6716 states have call successors, (6844) [2022-11-03 02:11:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25519 states to 25519 states and 34587 transitions. [2022-11-03 02:11:10,424 INFO L78 Accepts]: Start accepts. Automaton has 25519 states and 34587 transitions. Word has length 247 [2022-11-03 02:11:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:10,425 INFO L495 AbstractCegarLoop]: Abstraction has 25519 states and 34587 transitions. [2022-11-03 02:11:10,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:11:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 25519 states and 34587 transitions. [2022-11-03 02:11:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-03 02:11:10,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:10,433 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:10,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:11:10,434 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:10,434 INFO L85 PathProgramCache]: Analyzing trace with hash 395793516, now seen corresponding path program 1 times [2022-11-03 02:11:10,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:10,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754359657] [2022-11-03 02:11:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:10,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-11-03 02:11:11,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:11,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754359657] [2022-11-03 02:11:11,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754359657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:11,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:11,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:11:11,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674536020] [2022-11-03 02:11:11,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:11,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:11:11,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:11:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:11:11,061 INFO L87 Difference]: Start difference. First operand 25519 states and 34587 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 02:11:13,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:17,368 INFO L93 Difference]: Finished difference Result 50954 states and 69057 transitions. [2022-11-03 02:11:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:11:17,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 297 [2022-11-03 02:11:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:17,442 INFO L225 Difference]: With dead ends: 50954 [2022-11-03 02:11:17,442 INFO L226 Difference]: Without dead ends: 25522 [2022-11-03 02:11:17,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:11:17,490 INFO L413 NwaCegarLoop]: 1541 mSDtfsCounter, 1022 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 2210 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:17,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1022 Valid, 2210 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-03 02:11:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25522 states. [2022-11-03 02:11:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25522 to 25149. [2022-11-03 02:11:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25149 states, 15871 states have (on average 1.3071640098292483) internal successors, (20746), 16089 states have internal predecessors, (20746), 6526 states have call successors, (6526), 2770 states have call predecessors, (6526), 2751 states have return successors, (6477), 6417 states have call predecessors, (6477), 6477 states have call successors, (6477) [2022-11-03 02:11:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25149 states to 25149 states and 33749 transitions. [2022-11-03 02:11:18,579 INFO L78 Accepts]: Start accepts. Automaton has 25149 states and 33749 transitions. Word has length 297 [2022-11-03 02:11:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:18,580 INFO L495 AbstractCegarLoop]: Abstraction has 25149 states and 33749 transitions. [2022-11-03 02:11:18,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-03 02:11:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 25149 states and 33749 transitions. [2022-11-03 02:11:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-11-03 02:11:18,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:18,594 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:11:18,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:11:18,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:18,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1622102671, now seen corresponding path program 1 times [2022-11-03 02:11:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:18,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466285920] [2022-11-03 02:11:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:18,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1643 trivial. 0 not checked. [2022-11-03 02:11:19,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466285920] [2022-11-03 02:11:19,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466285920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:19,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:19,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:11:19,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234029348] [2022-11-03 02:11:19,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:19,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:11:19,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:11:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:11:19,346 INFO L87 Difference]: Start difference. First operand 25149 states and 33749 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:11:21,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:24,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:26,873 INFO L93 Difference]: Finished difference Result 25159 states and 33757 transitions. [2022-11-03 02:11:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:11:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 311 [2022-11-03 02:11:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:26,997 INFO L225 Difference]: With dead ends: 25159 [2022-11-03 02:11:26,997 INFO L226 Difference]: Without dead ends: 25156 [2022-11-03 02:11:27,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:11:27,006 INFO L413 NwaCegarLoop]: 1187 mSDtfsCounter, 561 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:27,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 1894 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-03 02:11:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25156 states. [2022-11-03 02:11:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25156 to 25148. [2022-11-03 02:11:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25148 states, 15871 states have (on average 1.303635561716338) internal successors, (20690), 16088 states have internal predecessors, (20690), 6525 states have call successors, (6525), 2770 states have call predecessors, (6525), 2751 states have return successors, (6477), 6417 states have call predecessors, (6477), 6477 states have call successors, (6477) [2022-11-03 02:11:27,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25148 states to 25148 states and 33692 transitions. [2022-11-03 02:11:27,901 INFO L78 Accepts]: Start accepts. Automaton has 25148 states and 33692 transitions. Word has length 311 [2022-11-03 02:11:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:27,902 INFO L495 AbstractCegarLoop]: Abstraction has 25148 states and 33692 transitions. [2022-11-03 02:11:27,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-03 02:11:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25148 states and 33692 transitions. [2022-11-03 02:11:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-11-03 02:11:27,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:27,950 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:27,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:11:27,951 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:27,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1709369296, now seen corresponding path program 1 times [2022-11-03 02:11:27,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:27,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261587708] [2022-11-03 02:11:27,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:27,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-11-03 02:11:29,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:29,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261587708] [2022-11-03 02:11:29,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261587708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:29,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:29,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558774289] [2022-11-03 02:11:29,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:29,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:29,507 INFO L87 Difference]: Start difference. First operand 25148 states and 33692 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-03 02:11:31,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:34,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:39,026 INFO L93 Difference]: Finished difference Result 66935 states and 94101 transitions. [2022-11-03 02:11:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:11:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 355 [2022-11-03 02:11:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:39,126 INFO L225 Difference]: With dead ends: 66935 [2022-11-03 02:11:39,126 INFO L226 Difference]: Without dead ends: 41874 [2022-11-03 02:11:39,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 02:11:39,163 INFO L413 NwaCegarLoop]: 1720 mSDtfsCounter, 950 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 212 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:39,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 4324 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 465 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-11-03 02:11:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41874 states. [2022-11-03 02:11:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41874 to 25180. [2022-11-03 02:11:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25180 states, 15903 states have (on average 1.30201848707791) internal successors, (20706), 16120 states have internal predecessors, (20706), 6525 states have call successors, (6525), 2770 states have call predecessors, (6525), 2751 states have return successors, (6477), 6417 states have call predecessors, (6477), 6477 states have call successors, (6477) [2022-11-03 02:11:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25180 states to 25180 states and 33708 transitions. [2022-11-03 02:11:40,686 INFO L78 Accepts]: Start accepts. Automaton has 25180 states and 33708 transitions. Word has length 355 [2022-11-03 02:11:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:40,687 INFO L495 AbstractCegarLoop]: Abstraction has 25180 states and 33708 transitions. [2022-11-03 02:11:40,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2022-11-03 02:11:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 25180 states and 33708 transitions. [2022-11-03 02:11:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-11-03 02:11:40,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:40,734 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:40,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:11:40,734 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:40,735 INFO L85 PathProgramCache]: Analyzing trace with hash -490414861, now seen corresponding path program 1 times [2022-11-03 02:11:40,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:40,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455010795] [2022-11-03 02:11:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-11-03 02:11:41,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:41,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455010795] [2022-11-03 02:11:41,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455010795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:41,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:41,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:11:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968658326] [2022-11-03 02:11:41,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:41,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:11:41,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:41,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:11:41,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:11:41,204 INFO L87 Difference]: Start difference. First operand 25180 states and 33708 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-03 02:11:43,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:46,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:11:49,223 INFO L93 Difference]: Finished difference Result 57686 states and 79211 transitions. [2022-11-03 02:11:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:11:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 359 [2022-11-03 02:11:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:11:49,297 INFO L225 Difference]: With dead ends: 57686 [2022-11-03 02:11:49,297 INFO L226 Difference]: Without dead ends: 32593 [2022-11-03 02:11:49,336 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 02:11:49,336 INFO L413 NwaCegarLoop]: 1477 mSDtfsCounter, 339 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:11:49,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 2543 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 02:11:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32593 states. [2022-11-03 02:11:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32593 to 25212. [2022-11-03 02:11:50,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25212 states, 15919 states have (on average 1.3007098435831397) internal successors, (20706), 16136 states have internal predecessors, (20706), 6541 states have call successors, (6541), 2770 states have call predecessors, (6541), 2751 states have return successors, (6493), 6433 states have call predecessors, (6493), 6493 states have call successors, (6493) [2022-11-03 02:11:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25212 states to 25212 states and 33740 transitions. [2022-11-03 02:11:50,753 INFO L78 Accepts]: Start accepts. Automaton has 25212 states and 33740 transitions. Word has length 359 [2022-11-03 02:11:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:11:50,754 INFO L495 AbstractCegarLoop]: Abstraction has 25212 states and 33740 transitions. [2022-11-03 02:11:50,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-03 02:11:50,754 INFO L276 IsEmpty]: Start isEmpty. Operand 25212 states and 33740 transitions. [2022-11-03 02:11:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-11-03 02:11:50,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:11:50,800 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:11:50,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:11:50,800 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:11:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:11:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1362908178, now seen corresponding path program 1 times [2022-11-03 02:11:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:11:50,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696205822] [2022-11-03 02:11:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:11:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:11:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:11:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-11-03 02:11:52,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:11:52,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696205822] [2022-11-03 02:11:52,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696205822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:11:52,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:11:52,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:11:52,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499634641] [2022-11-03 02:11:52,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:11:52,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:11:52,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:11:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:11:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:11:52,111 INFO L87 Difference]: Start difference. First operand 25212 states and 33740 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-03 02:11:53,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:55,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:11:59,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:01,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:07,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:08,637 INFO L93 Difference]: Finished difference Result 66113 states and 92729 transitions. [2022-11-03 02:12:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:12:08,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 362 [2022-11-03 02:12:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:08,769 INFO L225 Difference]: With dead ends: 66113 [2022-11-03 02:12:08,769 INFO L226 Difference]: Without dead ends: 40988 [2022-11-03 02:12:08,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 02:12:08,934 INFO L413 NwaCegarLoop]: 1690 mSDtfsCounter, 935 mSDsluCounter, 2862 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 192 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 4278 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:08,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 4278 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 465 Invalid, 3 Unknown, 0 Unchecked, 14.0s Time] [2022-11-03 02:12:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40988 states. [2022-11-03 02:12:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40988 to 24945. [2022-11-03 02:12:10,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24945 states, 15784 states have (on average 1.3001773948302078) internal successors, (20522), 15985 states have internal predecessors, (20522), 6458 states have call successors, (6458), 2721 states have call predecessors, (6458), 2702 states have return successors, (6411), 6366 states have call predecessors, (6411), 6411 states have call successors, (6411) [2022-11-03 02:12:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24945 states to 24945 states and 33391 transitions. [2022-11-03 02:12:10,583 INFO L78 Accepts]: Start accepts. Automaton has 24945 states and 33391 transitions. Word has length 362 [2022-11-03 02:12:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:10,584 INFO L495 AbstractCegarLoop]: Abstraction has 24945 states and 33391 transitions. [2022-11-03 02:12:10,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2022-11-03 02:12:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24945 states and 33391 transitions. [2022-11-03 02:12:10,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2022-11-03 02:12:10,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:10,633 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:10,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:12:10,633 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:10,634 INFO L85 PathProgramCache]: Analyzing trace with hash 613600582, now seen corresponding path program 1 times [2022-11-03 02:12:10,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:10,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865955744] [2022-11-03 02:12:10,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:10,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-11-03 02:12:12,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865955744] [2022-11-03 02:12:12,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865955744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:12,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141172386] [2022-11-03 02:12:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:12,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:12,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:12,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:12,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:12:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:14,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 6121 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:12:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1689 trivial. 0 not checked. [2022-11-03 02:12:15,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:15,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141172386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:15,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:12:15,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-03 02:12:15,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215374725] [2022-11-03 02:12:15,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:15,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:12:15,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:15,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:12:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:12:15,034 INFO L87 Difference]: Start difference. First operand 24945 states and 33391 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-03 02:12:17,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:18,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:20,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:12:24,052 INFO L93 Difference]: Finished difference Result 49979 states and 66983 transitions. [2022-11-03 02:12:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:12:24,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 415 [2022-11-03 02:12:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:12:24,143 INFO L225 Difference]: With dead ends: 49979 [2022-11-03 02:12:24,143 INFO L226 Difference]: Without dead ends: 25121 [2022-11-03 02:12:24,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:12:24,200 INFO L413 NwaCegarLoop]: 1106 mSDtfsCounter, 11 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:12:24,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 2202 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-11-03 02:12:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25121 states. [2022-11-03 02:12:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25121 to 25057. [2022-11-03 02:12:25,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25057 states, 15880 states have (on average 1.3013853904282116) internal successors, (20666), 16081 states have internal predecessors, (20666), 6474 states have call successors, (6474), 2721 states have call predecessors, (6474), 2702 states have return successors, (6427), 6382 states have call predecessors, (6427), 6427 states have call successors, (6427) [2022-11-03 02:12:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25057 states to 25057 states and 33567 transitions. [2022-11-03 02:12:25,810 INFO L78 Accepts]: Start accepts. Automaton has 25057 states and 33567 transitions. Word has length 415 [2022-11-03 02:12:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:12:25,812 INFO L495 AbstractCegarLoop]: Abstraction has 25057 states and 33567 transitions. [2022-11-03 02:12:25,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2022-11-03 02:12:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 25057 states and 33567 transitions. [2022-11-03 02:12:25,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-11-03 02:12:25,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:12:25,863 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:12:25,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:12:26,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:12:26,077 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:12:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:12:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash -699583690, now seen corresponding path program 1 times [2022-11-03 02:12:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:12:26,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967185866] [2022-11-03 02:12:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:26,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:12:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2022-11-03 02:12:28,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:12:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967185866] [2022-11-03 02:12:28,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967185866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:12:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043234235] [2022-11-03 02:12:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:12:28,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:12:28,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:12:28,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:12:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:12:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:12:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 6211 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:12:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:12:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1691 trivial. 0 not checked. [2022-11-03 02:12:29,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:12:29,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043234235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:12:29,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:12:29,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2022-11-03 02:12:29,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761880580] [2022-11-03 02:12:29,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:12:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:12:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:12:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:12:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:12:29,953 INFO L87 Difference]: Start difference. First operand 25057 states and 33567 transitions. Second operand has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2022-11-03 02:12:32,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:35,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:38,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:39,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:44,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:47,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:49,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:51,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:56,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:12:58,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:00,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:05,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:13,422 INFO L93 Difference]: Finished difference Result 79781 states and 114518 transitions. [2022-11-03 02:13:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:13:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) Word has length 419 [2022-11-03 02:13:13,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:13,570 INFO L225 Difference]: With dead ends: 79781 [2022-11-03 02:13:13,570 INFO L226 Difference]: Without dead ends: 54811 [2022-11-03 02:13:13,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:13:13,809 INFO L413 NwaCegarLoop]: 2678 mSDtfsCounter, 848 mSDsluCounter, 12773 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 242 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 14442 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:13,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 14442 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1361 Invalid, 6 Unknown, 0 Unchecked, 39.7s Time] [2022-11-03 02:13:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54811 states. [2022-11-03 02:13:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54811 to 25473. [2022-11-03 02:13:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25473 states, 16216 states have (on average 1.3040207202762704) internal successors, (21146), 16417 states have internal predecessors, (21146), 6538 states have call successors, (6538), 2721 states have call predecessors, (6538), 2718 states have return successors, (6523), 6462 states have call predecessors, (6523), 6491 states have call successors, (6523) [2022-11-03 02:13:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25473 states to 25473 states and 34207 transitions. [2022-11-03 02:13:15,987 INFO L78 Accepts]: Start accepts. Automaton has 25473 states and 34207 transitions. Word has length 419 [2022-11-03 02:13:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:15,987 INFO L495 AbstractCegarLoop]: Abstraction has 25473 states and 34207 transitions. [2022-11-03 02:13:15,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2022-11-03 02:13:15,988 INFO L276 IsEmpty]: Start isEmpty. Operand 25473 states and 34207 transitions. [2022-11-03 02:13:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-11-03 02:13:16,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:16,033 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:16,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-03 02:13:16,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:13:16,249 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1839591542, now seen corresponding path program 1 times [2022-11-03 02:13:16,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:16,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132798179] [2022-11-03 02:13:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1688 trivial. 0 not checked. [2022-11-03 02:13:18,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132798179] [2022-11-03 02:13:18,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132798179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:18,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666030438] [2022-11-03 02:13:18,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:18,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:18,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:18,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:18,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:13:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 6320 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:13:20,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 864 proven. 0 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2022-11-03 02:13:21,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:13:21,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666030438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:13:21,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:13:21,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-03 02:13:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495705024] [2022-11-03 02:13:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:13:21,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:13:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:13:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:13:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:13:21,069 INFO L87 Difference]: Start difference. First operand 25473 states and 34207 transitions. Second operand has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-03 02:13:23,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:27,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:28,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:13:32,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:13:32,761 INFO L93 Difference]: Finished difference Result 50928 states and 68395 transitions. [2022-11-03 02:13:32,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:13:32,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) Word has length 426 [2022-11-03 02:13:32,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:13:32,845 INFO L225 Difference]: With dead ends: 50928 [2022-11-03 02:13:32,845 INFO L226 Difference]: Without dead ends: 25474 [2022-11-03 02:13:32,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:13:32,884 INFO L413 NwaCegarLoop]: 1102 mSDtfsCounter, 1 mSDsluCounter, 2439 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:13:32,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3286 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2022-11-03 02:13:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25474 states. [2022-11-03 02:13:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25474 to 25474. [2022-11-03 02:13:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25474 states, 16217 states have (on average 1.3040019732379602) internal successors, (21147), 16418 states have internal predecessors, (21147), 6538 states have call successors, (6538), 2721 states have call predecessors, (6538), 2718 states have return successors, (6523), 6462 states have call predecessors, (6523), 6491 states have call successors, (6523) [2022-11-03 02:13:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25474 states to 25474 states and 34208 transitions. [2022-11-03 02:13:34,447 INFO L78 Accepts]: Start accepts. Automaton has 25474 states and 34208 transitions. Word has length 426 [2022-11-03 02:13:34,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:13:34,448 INFO L495 AbstractCegarLoop]: Abstraction has 25474 states and 34208 transitions. [2022-11-03 02:13:34,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 4 states have internal predecessors, (133), 2 states have call successors, (58), 2 states have call predecessors, (58), 3 states have return successors, (55), 2 states have call predecessors, (55), 2 states have call successors, (55) [2022-11-03 02:13:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25474 states and 34208 transitions. [2022-11-03 02:13:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-11-03 02:13:34,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:13:34,498 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 9, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:13:34,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 02:13:34,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:13:34,713 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:13:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:13:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1690689204, now seen corresponding path program 1 times [2022-11-03 02:13:34,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:13:34,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144483476] [2022-11-03 02:13:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:34,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:13:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2022-11-03 02:13:36,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:13:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144483476] [2022-11-03 02:13:36,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144483476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:13:36,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276512270] [2022-11-03 02:13:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:13:36,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:13:36,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:13:36,906 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:13:36,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0140a684-14f3-4b5e-80da-5204953f1d44/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:13:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:13:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 6455 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-03 02:13:39,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:13:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 38 proven. 17 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-11-03 02:13:39,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:13:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2022-11-03 02:13:40,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276512270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:13:40,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [791417905] [2022-11-03 02:13:40,422 INFO L159 IcfgInterpreter]: Started Sifa with 197 locations of interest [2022-11-03 02:13:40,422 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:13:40,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:13:40,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:13:40,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:13:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:51,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:13:54,729 INFO L244 Elim1Store]: Index analysis took 4577 ms