./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--atm--nicstar.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--atm--nicstar.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4a1e17c33569fa40e536cd8c869720d5a80d6c0d7c343e9efbe1ac963f2ae01b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:34:52,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:34:52,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:34:52,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:34:52,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:34:52,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:34:52,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:34:52,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:34:52,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:34:52,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:34:52,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:34:52,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:34:52,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:34:52,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:34:52,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:34:52,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:34:52,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:34:52,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:34:52,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:34:52,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:34:52,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:34:52,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:34:52,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:34:52,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:34:52,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:34:52,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:34:52,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:34:52,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:34:52,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:34:52,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:34:52,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:34:52,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:34:52,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:34:52,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:34:52,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:34:52,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:34:52,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:34:52,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:34:52,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:34:52,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:34:52,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:34:52,565 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:34:52,607 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:34:52,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:34:52,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:34:52,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:34:52,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:34:52,610 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:34:52,610 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:34:52,610 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:34:52,611 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:34:52,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:34:52,612 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:34:52,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:34:52,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:34:52,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:34:52,613 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:34:52,613 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:34:52,613 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:34:52,614 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:34:52,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:34:52,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:34:52,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:34:52,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:34:52,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:34:52,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:34:52,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:34:52,617 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:34:52,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:34:52,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:34:52,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:34:52,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:52,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:34:52,619 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:34:52,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:34:52,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:34:52,620 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:34:52,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:34:52,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:34:52,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:34:52,621 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_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a1e17c33569fa40e536cd8c869720d5a80d6c0d7c343e9efbe1ac963f2ae01b [2022-11-19 07:34:52,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:34:52,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:34:52,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:34:52,997 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:34:52,998 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:34:53,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--atm--nicstar.ko-entry_point.cil.out.i [2022-11-19 07:34:53,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/data/3752001e3/3274a4dad2f3454284fcc020c4733eee/FLAG181f8297c [2022-11-19 07:34:54,077 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:34:54,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--atm--nicstar.ko-entry_point.cil.out.i [2022-11-19 07:34:54,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/data/3752001e3/3274a4dad2f3454284fcc020c4733eee/FLAG181f8297c [2022-11-19 07:34:54,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/data/3752001e3/3274a4dad2f3454284fcc020c4733eee [2022-11-19 07:34:54,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:34:54,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:34:54,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:54,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:34:54,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:34:54,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:54" (1/1) ... [2022-11-19 07:34:54,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66bca3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:54, skipping insertion in model container [2022-11-19 07:34:54,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:54" (1/1) ... [2022-11-19 07:34:54,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:34:54,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:57,204 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--atm--nicstar.ko-entry_point.cil.out.i[321673,321686] [2022-11-19 07:34:57,263 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-19 07:34:57,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:57,315 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:34:57,807 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--atm--nicstar.ko-entry_point.cil.out.i[321673,321686] [2022-11-19 07:34:57,813 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-19 07:34:57,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:57,914 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:34:57,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57 WrapperNode [2022-11-19 07:34:57,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:57,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:57,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:34:57,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:34:57,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,234 INFO L138 Inliner]: procedures = 252, calls = 2329, calls flagged for inlining = 114, calls inlined = 111, statements flattened = 6063 [2022-11-19 07:34:58,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:58,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:34:58,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:34:58,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:34:58,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,626 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:34:58,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:34:58,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:34:58,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:34:58,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (1/1) ... [2022-11-19 07:34:58,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:58,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:34:58,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:34:58,794 INFO L130 BoogieDeclarations]: Found specification of procedure atm_charge [2022-11-19 07:34:58,795 INFO L138 BoogieDeclarations]: Found implementation of procedure atm_charge [2022-11-19 07:34:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure skb_dequeue [2022-11-19 07:34:58,795 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_dequeue [2022-11-19 07:34:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure process_tsq [2022-11-19 07:34:58,795 INFO L138 BoogieDeclarations]: Found implementation of procedure process_tsq [2022-11-19 07:34:58,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:34:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_skb [2022-11-19 07:34:58,796 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_skb [2022-11-19 07:34:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:34:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:34:58,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:34:58,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:34:58,797 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:34:58,797 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_head_init [2022-11-19 07:34:58,797 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_head_init [2022-11-19 07:34:58,797 INFO L130 BoogieDeclarations]: Found specification of procedure ns_open [2022-11-19 07:34:58,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_open [2022-11-19 07:34:58,797 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-19 07:34:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-19 07:34:58,798 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-19 07:34:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-19 07:34:58,798 INFO L130 BoogieDeclarations]: Found specification of procedure ns_read_sram [2022-11-19 07:34:58,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_read_sram [2022-11-19 07:34:58,798 INFO L130 BoogieDeclarations]: Found specification of procedure get_scq [2022-11-19 07:34:58,799 INFO L138 BoogieDeclarations]: Found implementation of procedure get_scq [2022-11-19 07:34:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:34:58,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:34:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure recycle_rx_buf [2022-11-19 07:34:58,799 INFO L138 BoogieDeclarations]: Found implementation of procedure recycle_rx_buf [2022-11-19 07:34:58,799 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2022-11-19 07:34:58,800 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2022-11-19 07:34:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:34:58,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:34:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure __net_timestamp [2022-11-19 07:34:58,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __net_timestamp [2022-11-19 07:34:58,800 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2022-11-19 07:34:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2022-11-19 07:34:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-19 07:34:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-19 07:34:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 07:34:58,801 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 07:34:58,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:34:58,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:34:58,802 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-19 07:34:58,802 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-19 07:34:58,803 INFO L130 BoogieDeclarations]: Found specification of procedure ns_ioctl [2022-11-19 07:34:58,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_ioctl [2022-11-19 07:34:58,804 INFO L130 BoogieDeclarations]: Found specification of procedure dma_unmap_single_attrs [2022-11-19 07:34:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_unmap_single_attrs [2022-11-19 07:34:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:34:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-19 07:34:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-19 07:34:58,805 INFO L130 BoogieDeclarations]: Found specification of procedure process_rsq [2022-11-19 07:34:58,806 INFO L138 BoogieDeclarations]: Found implementation of procedure process_rsq [2022-11-19 07:34:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:34:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-19 07:34:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-19 07:34:58,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-19 07:34:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 07:34:58,808 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 07:34:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure __dev_alloc_skb [2022-11-19 07:34:58,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __dev_alloc_skb [2022-11-19 07:34:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:34:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2022-11-19 07:34:58,808 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2022-11-19 07:34:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add [2022-11-19 07:34:58,809 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add [2022-11-19 07:34:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:34:58,809 INFO L130 BoogieDeclarations]: Found specification of procedure dequeue_sm_buf [2022-11-19 07:34:58,810 INFO L138 BoogieDeclarations]: Found implementation of procedure dequeue_sm_buf [2022-11-19 07:34:58,810 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-19 07:34:58,810 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-19 07:34:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-19 07:34:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-19 07:34:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:34:58,811 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:34:58,811 INFO L130 BoogieDeclarations]: Found specification of procedure push_rxbufs [2022-11-19 07:34:58,812 INFO L138 BoogieDeclarations]: Found implementation of procedure push_rxbufs [2022-11-19 07:34:58,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:34:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure ns_phy_get [2022-11-19 07:34:58,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_phy_get [2022-11-19 07:34:58,813 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2022-11-19 07:34:58,813 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2022-11-19 07:34:58,814 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-19 07:34:58,814 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-19 07:34:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2022-11-19 07:34:58,815 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2022-11-19 07:34:58,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:34:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure ns_close [2022-11-19 07:34:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_close [2022-11-19 07:34:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2022-11-19 07:34:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2022-11-19 07:34:58,817 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2022-11-19 07:34:58,817 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2022-11-19 07:34:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:34:58,818 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2022-11-19 07:34:58,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2022-11-19 07:34:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure nicstar_read_eprom [2022-11-19 07:34:58,819 INFO L138 BoogieDeclarations]: Found implementation of procedure nicstar_read_eprom [2022-11-19 07:34:58,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:34:58,820 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:34:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure ns_phy_put [2022-11-19 07:34:58,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_phy_put [2022-11-19 07:34:58,820 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-19 07:34:58,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-19 07:34:58,821 INFO L130 BoogieDeclarations]: Found specification of procedure recycle_iov_buf [2022-11-19 07:34:58,822 INFO L138 BoogieDeclarations]: Found implementation of procedure recycle_iov_buf [2022-11-19 07:34:58,822 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2022-11-19 07:34:58,825 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2022-11-19 07:34:58,826 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:34:58,826 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:34:58,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:34:58,827 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2022-11-19 07:34:58,829 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2022-11-19 07:34:58,830 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2022-11-19 07:34:58,830 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2022-11-19 07:34:58,830 INFO L130 BoogieDeclarations]: Found specification of procedure ns_send [2022-11-19 07:34:58,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_send [2022-11-19 07:34:58,837 INFO L130 BoogieDeclarations]: Found specification of procedure __udelay [2022-11-19 07:34:58,837 INFO L138 BoogieDeclarations]: Found implementation of procedure __udelay [2022-11-19 07:34:58,837 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2022-11-19 07:34:58,837 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2022-11-19 07:34:58,838 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-19 07:34:58,838 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-19 07:34:58,838 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:34:58,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:34:58,838 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-19 07:34:58,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-19 07:34:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 07:34:58,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 07:34:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:34:58,839 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 07:34:58,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 07:34:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-19 07:34:58,840 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-19 07:34:58,840 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2022-11-19 07:34:58,840 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2022-11-19 07:34:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure idr_find [2022-11-19 07:34:58,841 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_find [2022-11-19 07:34:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:34:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2022-11-19 07:34:58,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2022-11-19 07:34:58,841 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-19 07:34:58,842 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-19 07:34:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-11-19 07:34:58,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-11-19 07:34:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:34:58,842 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:34:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-19 07:34:58,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-19 07:34:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2022-11-19 07:34:58,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2022-11-19 07:34:58,843 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-19 07:34:58,844 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-19 07:34:58,844 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2022-11-19 07:34:58,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2022-11-19 07:34:58,844 INFO L130 BoogieDeclarations]: Found specification of procedure free_scq [2022-11-19 07:34:58,844 INFO L138 BoogieDeclarations]: Found implementation of procedure free_scq [2022-11-19 07:34:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure idr_alloc [2022-11-19 07:34:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_alloc [2022-11-19 07:34:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reset_tail_pointer [2022-11-19 07:34:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reset_tail_pointer [2022-11-19 07:34:58,845 INFO L130 BoogieDeclarations]: Found specification of procedure recycle_iovec_rx_bufs [2022-11-19 07:34:58,845 INFO L138 BoogieDeclarations]: Found implementation of procedure recycle_iovec_rx_bufs [2022-11-19 07:34:58,846 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2022-11-19 07:34:58,846 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2022-11-19 07:34:58,846 INFO L130 BoogieDeclarations]: Found specification of procedure nicstar_remove_one [2022-11-19 07:34:58,846 INFO L138 BoogieDeclarations]: Found implementation of procedure nicstar_remove_one [2022-11-19 07:34:58,846 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2022-11-19 07:34:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2022-11-19 07:34:58,847 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-19 07:34:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-19 07:34:58,847 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2022-11-19 07:34:58,847 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2022-11-19 07:34:58,848 INFO L130 BoogieDeclarations]: Found specification of procedure ns_init_card_error [2022-11-19 07:34:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_init_card_error [2022-11-19 07:34:58,848 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2022-11-19 07:34:58,848 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2022-11-19 07:34:58,848 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2022-11-19 07:34:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2022-11-19 07:34:58,849 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-19 07:34:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-19 07:34:58,849 INFO L130 BoogieDeclarations]: Found specification of procedure ns_write_sram [2022-11-19 07:34:58,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ns_write_sram [2022-11-19 07:34:58,849 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2022-11-19 07:34:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2022-11-19 07:34:58,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:34:58,850 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-11-19 07:34:58,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~VOID [2022-11-19 07:34:58,850 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2022-11-19 07:34:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2022-11-19 07:34:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-19 07:34:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-19 07:34:58,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:34:58,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:34:58,852 INFO L130 BoogieDeclarations]: Found specification of procedure preempt_count [2022-11-19 07:34:58,852 INFO L138 BoogieDeclarations]: Found implementation of procedure preempt_count [2022-11-19 07:34:59,822 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:34:59,831 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:35:02,603 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:35:09,805 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:35:11,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:35:11,735 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 07:35:11,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:11 BoogieIcfgContainer [2022-11-19 07:35:11,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:35:11,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:35:11,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:35:11,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:35:11,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:54" (1/3) ... [2022-11-19 07:35:11,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79eb0953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:11, skipping insertion in model container [2022-11-19 07:35:11,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:57" (2/3) ... [2022-11-19 07:35:11,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79eb0953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:11, skipping insertion in model container [2022-11-19 07:35:11,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:11" (3/3) ... [2022-11-19 07:35:11,753 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--atm--nicstar.ko-entry_point.cil.out.i [2022-11-19 07:35:11,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:35:11,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:35:11,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:35:11,934 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;@5855d5d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:35:11,935 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:35:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 1656 states, 1000 states have (on average 1.348) internal successors, (1348), 1071 states have internal predecessors, (1348), 569 states have call successors, (569), 90 states have call predecessors, (569), 89 states have return successors, (563), 552 states have call predecessors, (563), 563 states have call successors, (563) [2022-11-19 07:35:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:35:11,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:11,982 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:11,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:11,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash 509497308, now seen corresponding path program 1 times [2022-11-19 07:35:12,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:12,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221331451] [2022-11-19 07:35:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:12,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:35:12,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:12,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221331451] [2022-11-19 07:35:12,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221331451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:12,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:12,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:35:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734200712] [2022-11-19 07:35:12,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:12,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:12,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:12,961 INFO L87 Difference]: Start difference. First operand has 1656 states, 1000 states have (on average 1.348) internal successors, (1348), 1071 states have internal predecessors, (1348), 569 states have call successors, (569), 90 states have call predecessors, (569), 89 states have return successors, (563), 552 states have call predecessors, (563), 563 states have call successors, (563) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:35:15,659 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 [] [2022-11-19 07:35:18,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:21,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:25,382 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 [] [2022-11-19 07:35:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:25,604 INFO L93 Difference]: Finished difference Result 4498 states and 6804 transitions. [2022-11-19 07:35:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:25,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 114 [2022-11-19 07:35:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:25,658 INFO L225 Difference]: With dead ends: 4498 [2022-11-19 07:35:25,658 INFO L226 Difference]: Without dead ends: 2842 [2022-11-19 07:35:25,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:25,685 INFO L413 NwaCegarLoop]: 2732 mSDtfsCounter, 1817 mSDsluCounter, 2223 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 4955 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:25,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1819 Valid, 4955 Invalid, 414 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4 Valid, 408 Invalid, 2 Unknown, 0 Unchecked, 12.1s Time] [2022-11-19 07:35:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2022-11-19 07:35:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2839. [2022-11-19 07:35:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 1716 states have (on average 1.3409090909090908) internal successors, (2301), 1826 states have internal predecessors, (2301), 953 states have call successors, (953), 170 states have call predecessors, (953), 169 states have return successors, (954), 930 states have call predecessors, (954), 952 states have call successors, (954) [2022-11-19 07:35:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 4208 transitions. [2022-11-19 07:35:26,022 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 4208 transitions. Word has length 114 [2022-11-19 07:35:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:26,026 INFO L495 AbstractCegarLoop]: Abstraction has 2839 states and 4208 transitions. [2022-11-19 07:35:26,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-19 07:35:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 4208 transitions. [2022-11-19 07:35:26,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:35:26,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:26,037 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:26,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:35:26,037 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1996636052, now seen corresponding path program 1 times [2022-11-19 07:35:26,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:26,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912309422] [2022-11-19 07:35:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:26,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:35:26,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:26,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912309422] [2022-11-19 07:35:26,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912309422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:26,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:26,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:35:26,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003485192] [2022-11-19 07:35:26,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:26,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:26,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:26,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:26,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:26,335 INFO L87 Difference]: Start difference. First operand 2839 states and 4208 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:35:28,895 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 [] [2022-11-19 07:35:31,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:33,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:38,253 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 [] [2022-11-19 07:35:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:38,906 INFO L93 Difference]: Finished difference Result 7546 states and 11150 transitions. [2022-11-19 07:35:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:38,907 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), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 125 [2022-11-19 07:35:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:38,948 INFO L225 Difference]: With dead ends: 7546 [2022-11-19 07:35:38,948 INFO L226 Difference]: Without dead ends: 4741 [2022-11-19 07:35:38,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:38,972 INFO L413 NwaCegarLoop]: 2614 mSDtfsCounter, 1665 mSDsluCounter, 2117 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 4731 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:38,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 4731 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 413 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2022-11-19 07:35:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4741 states. [2022-11-19 07:35:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4741 to 4728. [2022-11-19 07:35:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 2861 states have (on average 1.3313526738902481) internal successors, (3809), 3046 states have internal predecessors, (3809), 1573 states have call successors, (1573), 296 states have call predecessors, (1573), 293 states have return successors, (1587), 1526 states have call predecessors, (1587), 1572 states have call successors, (1587) [2022-11-19 07:35:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 6969 transitions. [2022-11-19 07:35:39,366 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 6969 transitions. Word has length 125 [2022-11-19 07:35:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:39,367 INFO L495 AbstractCegarLoop]: Abstraction has 4728 states and 6969 transitions. [2022-11-19 07:35:39,367 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), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:35:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 6969 transitions. [2022-11-19 07:35:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-19 07:35:39,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:39,371 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2022-11-19 07:35:39,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:35:39,372 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash 203408633, now seen corresponding path program 1 times [2022-11-19 07:35:39,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:39,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448009886] [2022-11-19 07:35:39,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:39,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-19 07:35:39,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:39,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448009886] [2022-11-19 07:35:39,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448009886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:39,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:39,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:35:39,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122344261] [2022-11-19 07:35:39,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:39,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:35:39,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:35:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:39,693 INFO L87 Difference]: Start difference. First operand 4728 states and 6969 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, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:35:43,027 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 [] [2022-11-19 07:35:45,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:47,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:49,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:54,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:35:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:55,263 INFO L93 Difference]: Finished difference Result 8532 states and 12775 transitions. [2022-11-19 07:35:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:35:55,264 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, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 137 [2022-11-19 07:35:55,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:55,339 INFO L225 Difference]: With dead ends: 8532 [2022-11-19 07:35:55,340 INFO L226 Difference]: Without dead ends: 8529 [2022-11-19 07:35:55,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:35:55,348 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 2185 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 5322 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:55,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2185 Valid, 5322 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 435 Invalid, 2 Unknown, 0 Unchecked, 15.1s Time] [2022-11-19 07:35:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8529 states. [2022-11-19 07:35:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8529 to 8426. [2022-11-19 07:35:55,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8426 states, 5133 states have (on average 1.3374245080849405) internal successors, (6865), 5453 states have internal predecessors, (6865), 2750 states have call successors, (2750), 547 states have call predecessors, (2750), 542 states have return successors, (2976), 2653 states have call predecessors, (2976), 2749 states have call successors, (2976) [2022-11-19 07:35:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8426 states to 8426 states and 12591 transitions. [2022-11-19 07:35:55,876 INFO L78 Accepts]: Start accepts. Automaton has 8426 states and 12591 transitions. Word has length 137 [2022-11-19 07:35:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:55,877 INFO L495 AbstractCegarLoop]: Abstraction has 8426 states and 12591 transitions. [2022-11-19 07:35:55,878 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, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:35:55,878 INFO L276 IsEmpty]: Start isEmpty. Operand 8426 states and 12591 transitions. [2022-11-19 07:35:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-19 07:35:55,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:55,884 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:55,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:35:55,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:55,885 INFO L85 PathProgramCache]: Analyzing trace with hash -971099239, now seen corresponding path program 1 times [2022-11-19 07:35:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:55,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819322543] [2022-11-19 07:35:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:55,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:35:56,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:56,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819322543] [2022-11-19 07:35:56,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819322543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:35:56,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:35:56,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:35:56,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475309817] [2022-11-19 07:35:56,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:35:56,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:35:56,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:35:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:35:56,491 INFO L87 Difference]: Start difference. First operand 8426 states and 12591 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:35:59,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:01,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:06,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:08,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:10,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:17,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:19,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:19,653 INFO L93 Difference]: Finished difference Result 20518 states and 30552 transitions. [2022-11-19 07:36:19,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:19,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 140 [2022-11-19 07:36:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:19,763 INFO L225 Difference]: With dead ends: 20518 [2022-11-19 07:36:19,763 INFO L226 Difference]: Without dead ends: 12126 [2022-11-19 07:36:19,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:19,944 INFO L413 NwaCegarLoop]: 2635 mSDtfsCounter, 1736 mSDsluCounter, 7466 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 10101 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:19,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1736 Valid, 10101 Invalid, 797 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 787 Invalid, 3 Unknown, 0 Unchecked, 22.5s Time] [2022-11-19 07:36:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12126 states. [2022-11-19 07:36:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12126 to 12099. [2022-11-19 07:36:20,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12099 states, 7314 states have (on average 1.3275909215203718) internal successors, (9710), 7788 states have internal predecessors, (9710), 3961 states have call successors, (3961), 823 states have call predecessors, (3961), 823 states have return successors, (4285), 3820 states have call predecessors, (4285), 3960 states have call successors, (4285) [2022-11-19 07:36:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12099 states to 12099 states and 17956 transitions. [2022-11-19 07:36:20,635 INFO L78 Accepts]: Start accepts. Automaton has 12099 states and 17956 transitions. Word has length 140 [2022-11-19 07:36:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:20,636 INFO L495 AbstractCegarLoop]: Abstraction has 12099 states and 17956 transitions. [2022-11-19 07:36:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:36:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 12099 states and 17956 transitions. [2022-11-19 07:36:20,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-19 07:36:20,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:20,640 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:20,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:36:20,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1201791350, now seen corresponding path program 1 times [2022-11-19 07:36:20,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:20,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972505300] [2022-11-19 07:36:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:36:21,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:21,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972505300] [2022-11-19 07:36:21,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972505300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:21,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:21,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:36:21,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156771823] [2022-11-19 07:36:21,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:21,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:36:21,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:36:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:36:21,101 INFO L87 Difference]: Start difference. First operand 12099 states and 17956 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:36:24,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:27,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:29,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:31,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:35,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:36,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:37,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:40,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:42,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:45,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:45,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:45,679 INFO L93 Difference]: Finished difference Result 32496 states and 48303 transitions. [2022-11-19 07:36:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:45,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2022-11-19 07:36:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:45,838 INFO L225 Difference]: With dead ends: 32496 [2022-11-19 07:36:45,839 INFO L226 Difference]: Without dead ends: 20431 [2022-11-19 07:36:45,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:45,930 INFO L413 NwaCegarLoop]: 2765 mSDtfsCounter, 2281 mSDsluCounter, 7726 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2283 SdHoareTripleChecker+Valid, 10491 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:45,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2283 Valid, 10491 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 791 Invalid, 4 Unknown, 0 Unchecked, 23.7s Time] [2022-11-19 07:36:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20431 states. [2022-11-19 07:36:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20431 to 20398. [2022-11-19 07:36:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20398 states, 12381 states have (on average 1.330587190049269) internal successors, (16474), 13177 states have internal predecessors, (16474), 6638 states have call successors, (6638), 1378 states have call predecessors, (6638), 1378 states have return successors, (7196), 6401 states have call predecessors, (7196), 6637 states have call successors, (7196) [2022-11-19 07:36:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20398 states to 20398 states and 30308 transitions. [2022-11-19 07:36:47,449 INFO L78 Accepts]: Start accepts. Automaton has 20398 states and 30308 transitions. Word has length 142 [2022-11-19 07:36:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:47,450 INFO L495 AbstractCegarLoop]: Abstraction has 20398 states and 30308 transitions. [2022-11-19 07:36:47,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:36:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 20398 states and 30308 transitions. [2022-11-19 07:36:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-19 07:36:47,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:47,454 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:47,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:36:47,455 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:47,455 INFO L85 PathProgramCache]: Analyzing trace with hash -692753062, now seen corresponding path program 1 times [2022-11-19 07:36:47,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971094707] [2022-11-19 07:36:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:47,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:36:47,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:47,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971094707] [2022-11-19 07:36:47,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971094707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:47,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:47,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:36:47,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605816312] [2022-11-19 07:36:47,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:47,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:36:47,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:36:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:36:47,982 INFO L87 Difference]: Start difference. First operand 20398 states and 30308 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:36:51,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:53,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:57,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:36:59,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:01,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:04,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:08,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:10,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:12,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:13,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:14,503 INFO L93 Difference]: Finished difference Result 44404 states and 65885 transitions. [2022-11-19 07:37:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:37:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2022-11-19 07:37:14,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:14,834 INFO L225 Difference]: With dead ends: 44404 [2022-11-19 07:37:14,835 INFO L226 Difference]: Without dead ends: 24040 [2022-11-19 07:37:14,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:37:14,971 INFO L413 NwaCegarLoop]: 2921 mSDtfsCounter, 1734 mSDsluCounter, 8040 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 7 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 10961 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:14,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1735 Valid, 10961 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 865 Invalid, 5 Unknown, 0 Unchecked, 25.4s Time] [2022-11-19 07:37:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24040 states. [2022-11-19 07:37:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24040 to 23963. [2022-11-19 07:37:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23963 states, 14492 states have (on average 1.3270770080044163) internal successors, (19232), 15439 states have internal predecessors, (19232), 7822 states have call successors, (7822), 1648 states have call predecessors, (7822), 1648 states have return successors, (8462), 7537 states have call predecessors, (8462), 7821 states have call successors, (8462) [2022-11-19 07:37:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23963 states to 23963 states and 35516 transitions. [2022-11-19 07:37:16,803 INFO L78 Accepts]: Start accepts. Automaton has 23963 states and 35516 transitions. Word has length 139 [2022-11-19 07:37:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:16,804 INFO L495 AbstractCegarLoop]: Abstraction has 23963 states and 35516 transitions. [2022-11-19 07:37:16,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:37:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 23963 states and 35516 transitions. [2022-11-19 07:37:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:37:16,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:16,811 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:37:16,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash -776279209, now seen corresponding path program 1 times [2022-11-19 07:37:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:16,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159579921] [2022-11-19 07:37:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:16,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:37:17,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159579921] [2022-11-19 07:37:17,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159579921] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:17,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:17,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:37:17,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953217302] [2022-11-19 07:37:17,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:17,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:37:17,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:17,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:37:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:37:17,181 INFO L87 Difference]: Start difference. First operand 23963 states and 35516 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:37:20,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:23,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:25,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:27,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:29,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:30,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:32,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:34,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:35,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:36,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:40,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:42,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:44,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:46,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:46,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:46,773 INFO L93 Difference]: Finished difference Result 46564 states and 68882 transitions. [2022-11-19 07:37:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:37:46,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 141 [2022-11-19 07:37:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:47,008 INFO L225 Difference]: With dead ends: 46564 [2022-11-19 07:37:47,008 INFO L226 Difference]: Without dead ends: 23012 [2022-11-19 07:37:47,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:37:47,135 INFO L413 NwaCegarLoop]: 2745 mSDtfsCounter, 2192 mSDsluCounter, 7686 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 7 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2212 SdHoareTripleChecker+Valid, 10431 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:47,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2212 Valid, 10431 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 788 Invalid, 6 Unknown, 0 Unchecked, 28.2s Time] [2022-11-19 07:37:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23012 states. [2022-11-19 07:37:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23012 to 22967. [2022-11-19 07:37:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22967 states, 13893 states have (on average 1.3244799539336356) internal successors, (18401), 14800 states have internal predecessors, (18401), 7451 states have call successors, (7451), 1620 states have call predecessors, (7451), 1622 states have return successors, (8047), 7172 states have call predecessors, (8047), 7450 states have call successors, (8047) [2022-11-19 07:37:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22967 states to 22967 states and 33899 transitions. [2022-11-19 07:37:48,358 INFO L78 Accepts]: Start accepts. Automaton has 22967 states and 33899 transitions. Word has length 141 [2022-11-19 07:37:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:48,359 INFO L495 AbstractCegarLoop]: Abstraction has 22967 states and 33899 transitions. [2022-11-19 07:37:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-19 07:37:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 22967 states and 33899 transitions. [2022-11-19 07:37:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-19 07:37:48,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:48,365 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2022-11-19 07:37:48,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:37:48,366 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1225102071, now seen corresponding path program 1 times [2022-11-19 07:37:48,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:48,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183582068] [2022-11-19 07:37:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:48,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-19 07:37:49,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:49,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183582068] [2022-11-19 07:37:49,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183582068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:37:49,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100219741] [2022-11-19 07:37:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:49,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:37:49,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:37:49,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:37:49,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:37:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:50,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:37:50,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:37:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:37:50,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:37:50,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100219741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:50,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:37:50,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-19 07:37:50,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721877952] [2022-11-19 07:37:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:50,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:37:50,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:37:50,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:37:50,450 INFO L87 Difference]: Start difference. First operand 22967 states and 33899 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:37:55,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:57,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:37:59,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:01,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:03,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:07,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:09,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:11,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:13,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:15,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:17,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:19,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:22,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:26,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:32,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:34,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:36,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:37,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:39,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:42,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:44,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:46,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:48,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:38:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:50,122 INFO L93 Difference]: Finished difference Result 62049 states and 91719 transitions. [2022-11-19 07:38:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:38:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2022-11-19 07:38:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:50,357 INFO L225 Difference]: With dead ends: 62049 [2022-11-19 07:38:50,357 INFO L226 Difference]: Without dead ends: 41587 [2022-11-19 07:38:50,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:38:50,500 INFO L413 NwaCegarLoop]: 3287 mSDtfsCounter, 2137 mSDsluCounter, 15353 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 6 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2155 SdHoareTripleChecker+Valid, 18640 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:50,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2155 Valid, 18640 Invalid, 1562 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 1548 Invalid, 8 Unknown, 0 Unchecked, 58.0s Time] [2022-11-19 07:38:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41587 states. [2022-11-19 07:38:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41587 to 41308. [2022-11-19 07:38:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41308 states, 25113 states have (on average 1.3274399713295904) internal successors, (33336), 26779 states have internal predecessors, (33336), 13308 states have call successors, (13308), 2884 states have call predecessors, (13308), 2886 states have return successors, (14420), 12765 states have call predecessors, (14420), 13307 states have call successors, (14420) [2022-11-19 07:38:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41308 states to 41308 states and 61064 transitions. [2022-11-19 07:38:52,858 INFO L78 Accepts]: Start accepts. Automaton has 41308 states and 61064 transitions. Word has length 152 [2022-11-19 07:38:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:52,859 INFO L495 AbstractCegarLoop]: Abstraction has 41308 states and 61064 transitions. [2022-11-19 07:38:52,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:38:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 41308 states and 61064 transitions. [2022-11-19 07:38:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-19 07:38:52,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:52,865 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:52,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:53,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:53,082 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1177523259, now seen corresponding path program 1 times [2022-11-19 07:38:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322646872] [2022-11-19 07:38:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:38:53,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:38:53,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322646872] [2022-11-19 07:38:53,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322646872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:38:53,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188928007] [2022-11-19 07:38:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:53,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:53,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:38:53,612 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:38:53,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:38:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:38:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:38:54,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:38:54,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:38:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188928007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:38:54,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:38:54,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-19 07:38:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763782632] [2022-11-19 07:38:54,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:38:54,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:38:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:38:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:38:54,840 INFO L87 Difference]: Start difference. First operand 41308 states and 61064 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:38:59,187 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 [] [2022-11-19 07:39:02,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:04,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:05,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:07,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:09,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:12,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:14,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:20,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:23,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:25,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:26,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:27,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:29,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:30,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:32,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:33,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:35,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:38,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:39:40,448 INFO L93 Difference]: Finished difference Result 99369 states and 146897 transitions. [2022-11-19 07:39:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:39:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 153 [2022-11-19 07:39:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:39:40,805 INFO L225 Difference]: With dead ends: 99369 [2022-11-19 07:39:40,805 INFO L226 Difference]: Without dead ends: 60566 [2022-11-19 07:39:41,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:39:41,058 INFO L413 NwaCegarLoop]: 3380 mSDtfsCounter, 2224 mSDsluCounter, 15713 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 19093 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:39:41,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 19093 Invalid, 1572 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 1563 Invalid, 3 Unknown, 0 Unchecked, 42.9s Time] [2022-11-19 07:39:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60566 states. [2022-11-19 07:39:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60566 to 60259. [2022-11-19 07:39:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60259 states, 36655 states have (on average 1.3281407720638385) internal successors, (48683), 39142 states have internal predecessors, (48683), 19361 states have call successors, (19361), 4204 states have call predecessors, (19361), 4242 states have return successors, (21013), 18552 states have call predecessors, (21013), 19360 states have call successors, (21013) [2022-11-19 07:39:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60259 states to 60259 states and 89057 transitions. [2022-11-19 07:39:44,175 INFO L78 Accepts]: Start accepts. Automaton has 60259 states and 89057 transitions. Word has length 153 [2022-11-19 07:39:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:39:44,176 INFO L495 AbstractCegarLoop]: Abstraction has 60259 states and 89057 transitions. [2022-11-19 07:39:44,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:39:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 60259 states and 89057 transitions. [2022-11-19 07:39:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-19 07:39:44,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:39:44,184 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:39:44,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:39:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:39:44,396 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:39:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:39:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash 589897570, now seen corresponding path program 1 times [2022-11-19 07:39:44,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:39:44,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197702292] [2022-11-19 07:39:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:44,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:39:45,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:39:45,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197702292] [2022-11-19 07:39:45,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197702292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:39:45,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268174243] [2022-11-19 07:39:45,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:39:45,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:39:45,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:39:45,297 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:39:45,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:39:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:39:46,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:39:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:39:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:39:46,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:39:46,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268174243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:39:46,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:39:46,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-19 07:39:46,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090873340] [2022-11-19 07:39:46,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:39:46,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:39:46,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:39:46,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:39:46,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:39:46,557 INFO L87 Difference]: Start difference. First operand 60259 states and 89057 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:39:50,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:53,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:55,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:57,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:39:59,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:01,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:02,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:03,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:06,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:08,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:17,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:19,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:20,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:22,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:25,715 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 [] [2022-11-19 07:40:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:40:30,187 INFO L93 Difference]: Finished difference Result 137247 states and 202867 transitions. [2022-11-19 07:40:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:40:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2022-11-19 07:40:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:40:30,865 INFO L225 Difference]: With dead ends: 137247 [2022-11-19 07:40:30,865 INFO L226 Difference]: Without dead ends: 79493 [2022-11-19 07:40:31,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:40:31,118 INFO L413 NwaCegarLoop]: 3376 mSDtfsCounter, 2223 mSDsluCounter, 15697 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2227 SdHoareTripleChecker+Valid, 19073 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:40:31,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2227 Valid, 19073 Invalid, 1562 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 1550 Invalid, 6 Unknown, 0 Unchecked, 40.0s Time] [2022-11-19 07:40:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79493 states. [2022-11-19 07:40:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79493 to 76481. [2022-11-19 07:40:34,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76481 states, 46549 states have (on average 1.3304474854454447) internal successors, (61931), 49712 states have internal predecessors, (61931), 24587 states have call successors, (24587), 5298 states have call predecessors, (24587), 5344 states have return successors, (26711), 23562 states have call predecessors, (26711), 24586 states have call successors, (26711) [2022-11-19 07:40:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76481 states to 76481 states and 113229 transitions. [2022-11-19 07:40:35,498 INFO L78 Accepts]: Start accepts. Automaton has 76481 states and 113229 transitions. Word has length 154 [2022-11-19 07:40:35,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:40:35,498 INFO L495 AbstractCegarLoop]: Abstraction has 76481 states and 113229 transitions. [2022-11-19 07:40:35,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:40:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 76481 states and 113229 transitions. [2022-11-19 07:40:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-19 07:40:35,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:40:35,505 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2022-11-19 07:40:35,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:40:35,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:35,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:40:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:40:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash -162153922, now seen corresponding path program 1 times [2022-11-19 07:40:35,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:40:35,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72522007] [2022-11-19 07:40:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:40:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:40:36,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:36,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72522007] [2022-11-19 07:40:36,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72522007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807430811] [2022-11-19 07:40:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:40:36,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:36,234 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:36,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:40:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:40:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:40:37,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:40:37,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807430811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:40:37,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:40:37,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-19 07:40:37,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373693297] [2022-11-19 07:40:37,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:40:37,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:40:37,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:40:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:40:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:40:37,546 INFO L87 Difference]: Start difference. First operand 76481 states and 113229 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:40:41,279 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 [] [2022-11-19 07:40:44,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:45,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:47,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:50,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:40:53,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:02,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:03,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:04,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:05,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:06,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:08,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:10,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:13,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:14,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:15,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:16,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:17,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:41:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:41:21,987 INFO L93 Difference]: Finished difference Result 169699 states and 251203 transitions. [2022-11-19 07:41:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:41:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 155 [2022-11-19 07:41:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:41:22,800 INFO L225 Difference]: With dead ends: 169699 [2022-11-19 07:41:22,800 INFO L226 Difference]: Without dead ends: 95723 [2022-11-19 07:41:23,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:41:23,187 INFO L413 NwaCegarLoop]: 3321 mSDtfsCounter, 2224 mSDsluCounter, 15477 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 18798 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:41:23,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 18798 Invalid, 1511 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 1502 Invalid, 3 Unknown, 0 Unchecked, 40.0s Time] [2022-11-19 07:41:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95723 states. [2022-11-19 07:41:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95723 to 76489. [2022-11-19 07:41:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76489 states, 46557 states have (on average 1.3303907038683764) internal successors, (61939), 49712 states have internal predecessors, (61939), 24587 states have call successors, (24587), 5298 states have call predecessors, (24587), 5344 states have return successors, (26711), 23570 states have call predecessors, (26711), 24586 states have call successors, (26711) [2022-11-19 07:41:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76489 states to 76489 states and 113237 transitions. [2022-11-19 07:41:27,460 INFO L78 Accepts]: Start accepts. Automaton has 76489 states and 113237 transitions. Word has length 155 [2022-11-19 07:41:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:41:27,476 INFO L495 AbstractCegarLoop]: Abstraction has 76489 states and 113237 transitions. [2022-11-19 07:41:27,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-19 07:41:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 76489 states and 113237 transitions. [2022-11-19 07:41:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-19 07:41:27,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:41:27,486 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:41:27,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:41:27,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:41:27,691 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:41:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:41:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1229890802, now seen corresponding path program 1 times [2022-11-19 07:41:27,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:41:27,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311075464] [2022-11-19 07:41:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:41:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-19 07:41:28,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:41:28,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311075464] [2022-11-19 07:41:28,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311075464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:41:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283206394] [2022-11-19 07:41:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:41:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:41:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:41:28,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:41:28,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b298c349-52cf-4fac-a63e-f1681cfea40d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:41:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:41:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:41:29,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:41:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-19 07:41:29,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:41:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-19 07:41:29,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283206394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:41:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103489748] [2022-11-19 07:41:29,952 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-11-19 07:41:29,952 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:41:29,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:41:29,966 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:41:29,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:41:31,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 69 [2022-11-19 07:41:31,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:41:31,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-19 07:41:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:32,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:32,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:41:32,564 INFO L217 Elim1Store]: Index analysis took 562 ms [2022-11-19 07:42:24,335 WARN L233 SmtUtils]: Spent 51.70s on a formula simplification. DAG size of input: 2260 DAG size of output: 1033 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:42:24,344 INFO L321 Elim1Store]: treesize reduction 7536, result has 19.3 percent of original size [2022-11-19 07:42:24,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 91 select indices, 91 select index equivalence classes, 3749 disjoint index pairs (out of 4095 index pairs), introduced 91 new quantified variables, introduced 437 case distinctions, treesize of input 495 treesize of output 2113