./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--net--xen-netfront.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 283b2978ab7cc2aad6d9ef5bd7f2056001c273cafa889d9023ed11b9be13f4c5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:55:42,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:55:42,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:55:42,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:55:42,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:55:42,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:55:42,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:55:42,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:55:42,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:55:42,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:55:42,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:55:42,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:55:42,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:55:42,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:55:42,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:55:42,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:55:42,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:55:42,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:55:42,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:55:42,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:55:42,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:55:42,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:55:42,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:55:42,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:55:42,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:55:42,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:55:42,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:55:42,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:55:42,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:55:42,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:55:42,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:55:42,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:55:42,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:55:42,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:55:42,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:55:42,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:55:42,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:55:42,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:55:42,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:55:42,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:55:42,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:55:42,693 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:55:42,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:55:42,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:55:42,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:55:42,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:55:42,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:55:42,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:55:42,718 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:55:42,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:55:42,718 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:55:42,718 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:55:42,719 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:55:42,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:55:42,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:55:42,719 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:55:42,720 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:55:42,720 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:55:42,720 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:55:42,720 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:55:42,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:55:42,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:55:42,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:55:42,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:55:42,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:55:42,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:55:42,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:55:42,723 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:55:42,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:55:42,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:55:42,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:55:42,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:55:42,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:55:42,725 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:55:42,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:55:42,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:55:42,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:55:42,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:55:42,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:55:42,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:55:42,726 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_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 283b2978ab7cc2aad6d9ef5bd7f2056001c273cafa889d9023ed11b9be13f4c5 [2022-11-03 03:55:43,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:55:43,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:55:43,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:55:43,094 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:55:43,095 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:55:43,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2022-11-03 03:55:43,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/data/2d9b4740f/766e514c30d846cead0d2e2873862a58/FLAG78d1cf16d [2022-11-03 03:55:44,099 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:55:44,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2022-11-03 03:55:44,152 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/data/2d9b4740f/766e514c30d846cead0d2e2873862a58/FLAG78d1cf16d [2022-11-03 03:55:44,555 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/data/2d9b4740f/766e514c30d846cead0d2e2873862a58 [2022-11-03 03:55:44,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:55:44,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:55:44,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:55:44,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:55:44,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:55:44,571 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:44" (1/1) ... [2022-11-03 03:55:44,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@475bab74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:44, skipping insertion in model container [2022-11-03 03:55:44,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:55:44" (1/1) ... [2022-11-03 03:55:44,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:55:44,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:55:47,108 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319471,319484] [2022-11-03 03:55:47,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:55:47,226 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:55:47,764 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319471,319484] [2022-11-03 03:55:47,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:55:47,984 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:55:47,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47 WrapperNode [2022-11-03 03:55:47,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:55:47,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:55:47,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:55:47,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:55:47,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,291 INFO L138 Inliner]: procedures = 336, calls = 1905, calls flagged for inlining = 163, calls inlined = 135, statements flattened = 4619 [2022-11-03 03:55:48,292 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:55:48,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:55:48,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:55:48,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:55:48,303 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:55:48,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:55:48,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:55:48,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:55:48,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (1/1) ... [2022-11-03 03:55:48,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:55:48,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:55:48,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:55:48,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:55:48,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 03:55:48,733 INFO L130 BoogieDeclarations]: Found specification of procedure get_page [2022-11-03 03:55:48,733 INFO L138 BoogieDeclarations]: Found implementation of procedure get_page [2022-11-03 03:55:48,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 03:55:48,733 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:55:48,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:55:48,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 03:55:48,734 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 03:55:48,734 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2022-11-03 03:55:48,734 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2022-11-03 03:55:48,734 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_change_mtu [2022-11-03 03:55:48,734 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_change_mtu [2022-11-03 03:55:48,734 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-03 03:55:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-03 03:55:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_write [2022-11-03 03:55:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_write [2022-11-03 03:55:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2022-11-03 03:55:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2022-11-03 03:55:48,735 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-03 03:55:48,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-03 03:55:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:55:48,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:55:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2022-11-03 03:55:48,736 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2022-11-03 03:55:48,736 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_retry_irq [2022-11-03 03:55:48,736 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_retry_irq [2022-11-03 03:55:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure bind_evtchn_to_irqhandler [2022-11-03 03:55:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_evtchn_to_irqhandler [2022-11-03 03:55:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2022-11-03 03:55:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2022-11-03 03:55:48,737 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_remove [2022-11-03 03:55:48,737 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_remove [2022-11-03 03:55:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure __alloc_percpu [2022-11-03 03:55:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __alloc_percpu [2022-11-03 03:55:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:55:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:55:48,738 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_txreqs [2022-11-03 03:55:48,738 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_txreqs [2022-11-03 03:55:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_destroy_queues [2022-11-03 03:55:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_destroy_queues [2022-11-03 03:55:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2022-11-03 03:55:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2022-11-03 03:55:48,739 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-03 03:55:48,739 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-03 03:55:48,740 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_grant_ring [2022-11-03 03:55:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_grant_ring [2022-11-03 03:55:48,740 INFO L130 BoogieDeclarations]: Found specification of procedure free_percpu [2022-11-03 03:55:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure free_percpu [2022-11-03 03:55:48,741 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2022-11-03 03:55:48,742 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2022-11-03 03:55:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_claim_grant_reference [2022-11-03 03:55:48,743 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_claim_grant_reference [2022-11-03 03:55:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:55:48,743 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:55:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:55:48,744 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:55:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure netif_set_real_num_tx_queues [2022-11-03 03:55:48,744 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_set_real_num_tx_queues [2022-11-03 03:55:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access [2022-11-03 03:55:48,745 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access [2022-11-03 03:55:48,745 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_disconnect_backend [2022-11-03 03:55:48,745 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_disconnect_backend [2022-11-03 03:55:48,745 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_stats64 [2022-11-03 03:55:48,746 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_stats64 [2022-11-03 03:55:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-03 03:55:48,746 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-03 03:55:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_alloc_evtchn [2022-11-03 03:55:48,746 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_alloc_evtchn [2022-11-03 03:55:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2022-11-03 03:55:48,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2022-11-03 03:55:48,747 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_alloc_grant_references [2022-11-03 03:55:48,747 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_alloc_grant_references [2022-11-03 03:55:48,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-03 03:55:48,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-03 03:55:48,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:55:48,748 INFO L130 BoogieDeclarations]: Found specification of procedure netfront_tx_slot_available [2022-11-03 03:55:48,748 INFO L138 BoogieDeclarations]: Found implementation of procedure netfront_tx_slot_available [2022-11-03 03:55:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure notify_remote_via_irq [2022-11-03 03:55:48,749 INFO L138 BoogieDeclarations]: Found implementation of procedure notify_remote_via_irq [2022-11-03 03:55:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_release_grant_reference [2022-11-03 03:55:48,749 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_release_grant_reference [2022-11-03 03:55:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-03 03:55:48,750 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-03 03:55:48,750 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-11-03 03:55:48,750 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-11-03 03:55:48,750 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_can_sg [2022-11-03 03:55:48,751 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_can_sg [2022-11-03 03:55:48,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:55:48,752 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2022-11-03 03:55:48,752 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2022-11-03 03:55:48,752 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-03 03:55:48,752 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-03 03:55:48,753 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-03 03:55:48,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-03 03:55:48,753 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-03 03:55:48,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-03 03:55:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rxidx [2022-11-03 03:55:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rxidx [2022-11-03 03:55:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 03:55:48,754 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 03:55:48,754 INFO L130 BoogieDeclarations]: Found specification of procedure __pskb_pull_tail [2022-11-03 03:55:48,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __pskb_pull_tail [2022-11-03 03:55:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:55:48,755 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2022-11-03 03:55:48,756 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2022-11-03 03:55:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:55:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure write_queue_xenstore_keys [2022-11-03 03:55:48,756 INFO L138 BoogieDeclarations]: Found implementation of procedure write_queue_xenstore_keys [2022-11-03 03:55:48,756 INFO L130 BoogieDeclarations]: Found specification of procedure pfn_to_mfn [2022-11-03 03:55:48,757 INFO L138 BoogieDeclarations]: Found implementation of procedure pfn_to_mfn [2022-11-03 03:55:48,758 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2022-11-03 03:55:48,760 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2022-11-03 03:55:48,760 INFO L130 BoogieDeclarations]: Found specification of procedure add_id_to_freelist [2022-11-03 03:55:48,760 INFO L138 BoogieDeclarations]: Found implementation of procedure add_id_to_freelist [2022-11-03 03:55:48,761 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_alloc_rx_buffers [2022-11-03 03:55:48,762 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_alloc_rx_buffers [2022-11-03 03:55:48,762 INFO L130 BoogieDeclarations]: Found specification of procedure skb_entry_set_link [2022-11-03 03:55:48,763 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_entry_set_link [2022-11-03 03:55:48,763 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 03:55:48,764 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 03:55:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 03:55:48,770 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 03:55:48,770 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf [2022-11-03 03:55:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf [2022-11-03 03:55:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-03 03:55:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-03 03:55:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure free_pages [2022-11-03 03:55:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure free_pages [2022-11-03 03:55:48,771 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access_ref [2022-11-03 03:55:48,771 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access_ref [2022-11-03 03:55:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 03:55:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_one_txreq [2022-11-03 03:55:48,772 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_one_txreq [2022-11-03 03:55:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2022-11-03 03:55:48,772 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2022-11-03 03:55:48,772 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_free_grant_references [2022-11-03 03:55:48,772 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_free_grant_references [2022-11-03 03:55:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2022-11-03 03:55:48,773 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2022-11-03 03:55:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-03 03:55:48,773 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-03 03:55:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-03 03:55:48,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-03 03:55:48,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:55:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2022-11-03 03:55:48,774 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2022-11-03 03:55:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure get_zeroed_page [2022-11-03 03:55:48,774 INFO L138 BoogieDeclarations]: Found implementation of procedure get_zeroed_page [2022-11-03 03:55:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_free_netdev [2022-11-03 03:55:48,774 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_free_netdev [2022-11-03 03:55:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure netback_changed [2022-11-03 03:55:48,775 INFO L138 BoogieDeclarations]: Found implementation of procedure netback_changed [2022-11-03 03:55:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_poll_controller [2022-11-03 03:55:48,775 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_poll_controller [2022-11-03 03:55:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:55:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2022-11-03 03:55:48,775 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2022-11-03 03:55:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 03:55:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 03:55:48,776 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_select_queue [2022-11-03 03:55:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_select_queue [2022-11-03 03:55:48,776 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_end_access [2022-11-03 03:55:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_end_access [2022-11-03 03:55:48,776 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-03 03:55:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-03 03:55:48,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-03 03:55:48,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-03 03:55:48,777 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-03 03:55:48,777 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-03 03:55:48,777 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_init [2022-11-03 03:55:48,777 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_init [2022-11-03 03:55:48,777 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:55:48,778 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:55:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure skb_add_rx_frag [2022-11-03 03:55:48,778 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_add_rx_frag [2022-11-03 03:55:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:55:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2022-11-03 03:55:48,778 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2022-11-03 03:55:48,778 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2022-11-03 03:55:48,779 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2022-11-03 03:55:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:55:48,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:55:48,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 03:55:48,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 03:55:48,781 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_fix_features [2022-11-03 03:55:48,781 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_fix_features [2022-11-03 03:55:48,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:55:48,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_calloc [2022-11-03 03:55:48,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 03:55:48,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 03:55:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure get_phys_to_machine [2022-11-03 03:55:48,782 INFO L138 BoogieDeclarations]: Found implementation of procedure get_phys_to_machine [2022-11-03 03:55:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:55:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2022-11-03 03:55:48,782 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2022-11-03 03:55:48,782 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2022-11-03 03:55:48,783 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2022-11-03 03:55:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:55:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2022-11-03 03:55:48,783 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2022-11-03 03:55:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2022-11-03 03:55:48,783 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2022-11-03 03:55:48,783 INFO L130 BoogieDeclarations]: Found specification of procedure show_rxbuf [2022-11-03 03:55:48,783 INFO L138 BoogieDeclarations]: Found implementation of procedure show_rxbuf [2022-11-03 03:55:48,784 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2022-11-03 03:55:48,784 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2022-11-03 03:55:48,784 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2022-11-03 03:55:48,784 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2022-11-03 03:55:48,784 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_grant_foreign_access_ref [2022-11-03 03:55:48,784 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_grant_foreign_access_ref [2022-11-03 03:55:48,784 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2022-11-03 03:55:48,785 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2022-11-03 03:55:48,785 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_set_features [2022-11-03 03:55:48,785 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_set_features [2022-11-03 03:55:48,785 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2022-11-03 03:55:48,785 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2022-11-03 03:55:48,785 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_begin_irq [2022-11-03 03:55:48,785 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_begin_irq [2022-11-03 03:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_free_evtchn [2022-11-03 03:55:48,786 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_free_evtchn [2022-11-03 03:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:55:48,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:55:48,786 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_buf_gc [2022-11-03 03:55:48,786 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_buf_gc [2022-11-03 03:55:48,787 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-03 03:55:48,787 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-03 03:55:48,787 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 03:55:48,787 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 03:55:49,619 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:55:49,628 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:55:50,505 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:55:55,283 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:55:56,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:55:56,201 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 03:55:56,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:56 BoogieIcfgContainer [2022-11-03 03:55:56,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:55:56,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:55:56,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:55:56,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:55:56,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:55:44" (1/3) ... [2022-11-03 03:55:56,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798bd036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:56, skipping insertion in model container [2022-11-03 03:55:56,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:55:47" (2/3) ... [2022-11-03 03:55:56,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798bd036 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:55:56, skipping insertion in model container [2022-11-03 03:55:56,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:55:56" (3/3) ... [2022-11-03 03:55:56,220 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2022-11-03 03:55:56,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:55:56,242 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:55:56,339 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:55:56,347 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;@3b1f2a34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:55:56,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:55:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 1215 states, 756 states have (on average 1.3505291005291005) internal successors, (1021), 791 states have internal predecessors, (1021), 352 states have call successors, (352), 106 states have call predecessors, (352), 105 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) [2022-11-03 03:55:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-03 03:55:56,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:55:56,408 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:55:56,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:55:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:55:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1683322710, now seen corresponding path program 1 times [2022-11-03 03:55:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:55:56,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580841332] [2022-11-03 03:55:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:55:56,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:55:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:55:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2022-11-03 03:55:57,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:55:57,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580841332] [2022-11-03 03:55:57,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580841332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:55:57,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:55:57,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:55:57,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559361231] [2022-11-03 03:55:57,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:55:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:55:57,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:55:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:55:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:55:57,678 INFO L87 Difference]: Start difference. First operand has 1215 states, 756 states have (on average 1.3505291005291005) internal successors, (1021), 791 states have internal predecessors, (1021), 352 states have call successors, (352), 106 states have call predecessors, (352), 105 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-03 03:55:59,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:56:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:02,548 INFO L93 Difference]: Finished difference Result 3039 states and 4290 transitions. [2022-11-03 03:56:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:02,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 331 [2022-11-03 03:56:02,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:02,576 INFO L225 Difference]: With dead ends: 3039 [2022-11-03 03:56:02,576 INFO L226 Difference]: Without dead ends: 1843 [2022-11-03 03:56:02,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:02,593 INFO L413 NwaCegarLoop]: 1665 mSDtfsCounter, 915 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:02,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 3138 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-03 03:56:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-11-03 03:56:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1839. [2022-11-03 03:56:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1155 states have (on average 1.335930735930736) internal successors, (1543), 1189 states have internal predecessors, (1543), 511 states have call successors, (511), 173 states have call predecessors, (511), 172 states have return successors, (510), 503 states have call predecessors, (510), 510 states have call successors, (510) [2022-11-03 03:56:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2564 transitions. [2022-11-03 03:56:02,876 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2564 transitions. Word has length 331 [2022-11-03 03:56:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:02,883 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2564 transitions. [2022-11-03 03:56:02,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-03 03:56:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2564 transitions. [2022-11-03 03:56:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-11-03 03:56:02,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:02,898 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:02,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:56:02,899 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:02,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1732066142, now seen corresponding path program 1 times [2022-11-03 03:56:02,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:02,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660800697] [2022-11-03 03:56:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:02,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2022-11-03 03:56:03,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660800697] [2022-11-03 03:56:03,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660800697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:03,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:03,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436398112] [2022-11-03 03:56:03,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:03,515 INFO L87 Difference]: Start difference. First operand 1839 states and 2564 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-03 03:56:05,463 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 [] [2022-11-03 03:56:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:07,653 INFO L93 Difference]: Finished difference Result 4573 states and 6362 transitions. [2022-11-03 03:56:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:07,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 346 [2022-11-03 03:56:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:07,676 INFO L225 Difference]: With dead ends: 4573 [2022-11-03 03:56:07,676 INFO L226 Difference]: Without dead ends: 2789 [2022-11-03 03:56:07,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:07,685 INFO L413 NwaCegarLoop]: 1876 mSDtfsCounter, 1219 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 3166 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:07,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1219 Valid, 3166 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 03:56:07,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2022-11-03 03:56:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2777. [2022-11-03 03:56:07,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 1769 states have (on average 1.3459581684567552) internal successors, (2381), 1833 states have internal predecessors, (2381), 742 states have call successors, (742), 268 states have call predecessors, (742), 265 states have return successors, (741), 721 states have call predecessors, (741), 741 states have call successors, (741) [2022-11-03 03:56:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3864 transitions. [2022-11-03 03:56:07,911 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3864 transitions. Word has length 346 [2022-11-03 03:56:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:07,912 INFO L495 AbstractCegarLoop]: Abstraction has 2777 states and 3864 transitions. [2022-11-03 03:56:07,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2022-11-03 03:56:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3864 transitions. [2022-11-03 03:56:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-11-03 03:56:07,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:07,924 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:56:07,925 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -842138690, now seen corresponding path program 1 times [2022-11-03 03:56:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:07,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944484311] [2022-11-03 03:56:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:07,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2567 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2022-11-03 03:56:08,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:08,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944484311] [2022-11-03 03:56:08,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944484311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:08,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:08,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053193035] [2022-11-03 03:56:08,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:08,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:08,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:08,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:08,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:08,626 INFO L87 Difference]: Start difference. First operand 2777 states and 3864 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-11-03 03:56:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:13,578 INFO L93 Difference]: Finished difference Result 7268 states and 10099 transitions. [2022-11-03 03:56:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 418 [2022-11-03 03:56:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:13,605 INFO L225 Difference]: With dead ends: 7268 [2022-11-03 03:56:13,606 INFO L226 Difference]: Without dead ends: 4546 [2022-11-03 03:56:13,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:13,618 INFO L413 NwaCegarLoop]: 2401 mSDtfsCounter, 1532 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 3758 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:13,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1532 Valid, 3758 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-03 03:56:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2022-11-03 03:56:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4541. [2022-11-03 03:56:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4541 states, 2903 states have (on average 1.344126765415088) internal successors, (3902), 3010 states have internal predecessors, (3902), 1197 states have call successors, (1197), 443 states have call predecessors, (1197), 440 states have return successors, (1196), 1168 states have call predecessors, (1196), 1196 states have call successors, (1196) [2022-11-03 03:56:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4541 states to 4541 states and 6295 transitions. [2022-11-03 03:56:13,946 INFO L78 Accepts]: Start accepts. Automaton has 4541 states and 6295 transitions. Word has length 418 [2022-11-03 03:56:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:13,947 INFO L495 AbstractCegarLoop]: Abstraction has 4541 states and 6295 transitions. [2022-11-03 03:56:13,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-11-03 03:56:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4541 states and 6295 transitions. [2022-11-03 03:56:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-11-03 03:56:13,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:13,958 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:13,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:56:13,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:13,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1004471355, now seen corresponding path program 1 times [2022-11-03 03:56:13,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:13,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253436365] [2022-11-03 03:56:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:13,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2567 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2567 trivial. 0 not checked. [2022-11-03 03:56:14,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:14,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253436365] [2022-11-03 03:56:14,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253436365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:14,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:14,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:14,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693836102] [2022-11-03 03:56:14,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:14,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:14,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:14,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:14,989 INFO L87 Difference]: Start difference. First operand 4541 states and 6295 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-03 03:56:17,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:56:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:18,963 INFO L93 Difference]: Finished difference Result 4882 states and 6609 transitions. [2022-11-03 03:56:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:18,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 417 [2022-11-03 03:56:18,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:18,989 INFO L225 Difference]: With dead ends: 4882 [2022-11-03 03:56:18,990 INFO L226 Difference]: Without dead ends: 4879 [2022-11-03 03:56:18,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:18,994 INFO L413 NwaCegarLoop]: 1492 mSDtfsCounter, 1208 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:18,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1208 Valid, 1849 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 306 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 03:56:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-11-03 03:56:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4879. [2022-11-03 03:56:19,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4879 states, 3082 states have (on average 1.328358208955224) internal successors, (4094), 3193 states have internal predecessors, (4094), 1255 states have call successors, (1255), 544 states have call predecessors, (1255), 541 states have return successors, (1254), 1226 states have call predecessors, (1254), 1254 states have call successors, (1254) [2022-11-03 03:56:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4879 states to 4879 states and 6603 transitions. [2022-11-03 03:56:19,231 INFO L78 Accepts]: Start accepts. Automaton has 4879 states and 6603 transitions. Word has length 417 [2022-11-03 03:56:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:19,233 INFO L495 AbstractCegarLoop]: Abstraction has 4879 states and 6603 transitions. [2022-11-03 03:56:19,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2022-11-03 03:56:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4879 states and 6603 transitions. [2022-11-03 03:56:19,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-11-03 03:56:19,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:19,271 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:19,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:56:19,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -725442373, now seen corresponding path program 1 times [2022-11-03 03:56:19,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:19,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329834596] [2022-11-03 03:56:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:19,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2801 trivial. 0 not checked. [2022-11-03 03:56:19,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:19,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329834596] [2022-11-03 03:56:19,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329834596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:19,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:19,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:56:19,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444452709] [2022-11-03 03:56:19,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:19,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:56:19,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:56:19,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:19,945 INFO L87 Difference]: Start difference. First operand 4879 states and 6603 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2022-11-03 03:56:21,610 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 [] [2022-11-03 03:56:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:25,259 INFO L93 Difference]: Finished difference Result 11899 states and 16102 transitions. [2022-11-03 03:56:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:56:25,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 483 [2022-11-03 03:56:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:25,300 INFO L225 Difference]: With dead ends: 11899 [2022-11-03 03:56:25,300 INFO L226 Difference]: Without dead ends: 7075 [2022-11-03 03:56:25,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:56:25,320 INFO L413 NwaCegarLoop]: 2374 mSDtfsCounter, 1243 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 3741 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:25,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1243 Valid, 3741 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 03:56:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-11-03 03:56:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 7059. [2022-11-03 03:56:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7059 states, 4503 states have (on average 1.3251165889407062) internal successors, (5967), 4670 states have internal predecessors, (5967), 1758 states have call successors, (1758), 802 states have call predecessors, (1758), 797 states have return successors, (1757), 1712 states have call predecessors, (1757), 1757 states have call successors, (1757) [2022-11-03 03:56:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7059 states to 7059 states and 9482 transitions. [2022-11-03 03:56:25,673 INFO L78 Accepts]: Start accepts. Automaton has 7059 states and 9482 transitions. Word has length 483 [2022-11-03 03:56:25,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:25,674 INFO L495 AbstractCegarLoop]: Abstraction has 7059 states and 9482 transitions. [2022-11-03 03:56:25,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2022-11-03 03:56:25,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7059 states and 9482 transitions. [2022-11-03 03:56:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-11-03 03:56:25,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:25,701 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:25,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:56:25,701 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:25,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1141511879, now seen corresponding path program 1 times [2022-11-03 03:56:25,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:25,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92962731] [2022-11-03 03:56:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:25,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2022-11-03 03:56:26,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:26,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92962731] [2022-11-03 03:56:26,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92962731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:26,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:26,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:56:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026070643] [2022-11-03 03:56:26,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:56:26,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:56:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:56:26,887 INFO L87 Difference]: Start difference. First operand 7059 states and 9482 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:56:28,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:56:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:33,329 INFO L93 Difference]: Finished difference Result 14117 states and 18959 transitions. [2022-11-03 03:56:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:56:33,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 499 [2022-11-03 03:56:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:33,373 INFO L225 Difference]: With dead ends: 14117 [2022-11-03 03:56:33,373 INFO L226 Difference]: Without dead ends: 7113 [2022-11-03 03:56:33,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:56:33,399 INFO L413 NwaCegarLoop]: 1459 mSDtfsCounter, 24 mSDsluCounter, 4975 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 5784 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:33,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 5784 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 913 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-03 03:56:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2022-11-03 03:56:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 7071. [2022-11-03 03:56:33,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7071 states, 4515 states have (on average 1.324252491694352) internal successors, (5979), 4682 states have internal predecessors, (5979), 1758 states have call successors, (1758), 802 states have call predecessors, (1758), 797 states have return successors, (1757), 1712 states have call predecessors, (1757), 1757 states have call successors, (1757) [2022-11-03 03:56:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7071 states to 7071 states and 9494 transitions. [2022-11-03 03:56:33,793 INFO L78 Accepts]: Start accepts. Automaton has 7071 states and 9494 transitions. Word has length 499 [2022-11-03 03:56:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:33,794 INFO L495 AbstractCegarLoop]: Abstraction has 7071 states and 9494 transitions. [2022-11-03 03:56:33,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2022-11-03 03:56:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7071 states and 9494 transitions. [2022-11-03 03:56:33,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-11-03 03:56:33,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:33,819 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:33,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:56:33,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:33,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2129448288, now seen corresponding path program 1 times [2022-11-03 03:56:33,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:33,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182772231] [2022-11-03 03:56:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:33,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2829 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2813 trivial. 0 not checked. [2022-11-03 03:56:39,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182772231] [2022-11-03 03:56:39,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182772231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:39,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:56:39,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 03:56:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856929346] [2022-11-03 03:56:39,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:39,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 03:56:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:39,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 03:56:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:56:39,881 INFO L87 Difference]: Start difference. First operand 7071 states and 9494 transitions. Second operand has 12 states, 7 states have (on average 17.714285714285715) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 5 states have call predecessors, (52), 4 states have call successors, (52) [2022-11-03 03:56:41,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:56:50,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:56:50,014 INFO L93 Difference]: Finished difference Result 15817 states and 21712 transitions. [2022-11-03 03:56:50,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:56:50,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 17.714285714285715) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 5 states have call predecessors, (52), 4 states have call successors, (52) Word has length 500 [2022-11-03 03:56:50,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:56:50,059 INFO L225 Difference]: With dead ends: 15817 [2022-11-03 03:56:50,059 INFO L226 Difference]: Without dead ends: 8801 [2022-11-03 03:56:50,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:56:50,145 INFO L413 NwaCegarLoop]: 1878 mSDtfsCounter, 1090 mSDsluCounter, 19982 mSDsCounter, 0 mSdLazyCounter, 2767 mSolverCounterSat, 302 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 19523 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2767 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:56:50,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1091 Valid, 19523 Invalid, 3070 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [302 Valid, 2767 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2022-11-03 03:56:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8801 states. [2022-11-03 03:56:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8801 to 7083. [2022-11-03 03:56:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7083 states, 4524 states have (on average 1.323607427055703) internal successors, (5988), 4691 states have internal predecessors, (5988), 1761 states have call successors, (1761), 802 states have call predecessors, (1761), 797 states have return successors, (1760), 1715 states have call predecessors, (1760), 1760 states have call successors, (1760) [2022-11-03 03:56:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7083 states to 7083 states and 9509 transitions. [2022-11-03 03:56:50,540 INFO L78 Accepts]: Start accepts. Automaton has 7083 states and 9509 transitions. Word has length 500 [2022-11-03 03:56:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:56:50,541 INFO L495 AbstractCegarLoop]: Abstraction has 7083 states and 9509 transitions. [2022-11-03 03:56:50,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 17.714285714285715) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 5 states have call predecessors, (52), 4 states have call successors, (52) [2022-11-03 03:56:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7083 states and 9509 transitions. [2022-11-03 03:56:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-11-03 03:56:50,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:56:50,562 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:56:50,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:56:50,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:56:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:56:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1259732984, now seen corresponding path program 1 times [2022-11-03 03:56:50,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:56:50,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902303191] [2022-11-03 03:56:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:56:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2849 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2022-11-03 03:56:52,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:56:52,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902303191] [2022-11-03 03:56:52,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902303191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:56:52,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143955424] [2022-11-03 03:56:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:56:52,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:56:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:56:52,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:56:52,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:56:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:56:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 5023 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:56:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:56:54,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 03:56:54,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:56:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2849 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 2675 trivial. 0 not checked. [2022-11-03 03:56:54,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:56:54,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143955424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:56:54,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:56:54,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2022-11-03 03:56:54,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275417474] [2022-11-03 03:56:54,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:56:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:56:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:56:54,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:56:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-03 03:56:54,791 INFO L87 Difference]: Start difference. First operand 7083 states and 9509 transitions. Second operand has 11 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 4 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (58), 6 states have call predecessors, (58), 4 states have call successors, (58) [2022-11-03 03:56:57,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:56:59,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:57:01,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:57:03,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:57:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:20,575 INFO L93 Difference]: Finished difference Result 15862 states and 21371 transitions. [2022-11-03 03:57:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:57:20,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 4 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (58), 6 states have call predecessors, (58), 4 states have call successors, (58) Word has length 530 [2022-11-03 03:57:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:20,617 INFO L225 Difference]: With dead ends: 15862 [2022-11-03 03:57:20,618 INFO L226 Difference]: Without dead ends: 8834 [2022-11-03 03:57:20,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 520 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:57:20,643 INFO L413 NwaCegarLoop]: 1748 mSDtfsCounter, 612 mSDsluCounter, 14590 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 14706 SdHoareTripleChecker+Invalid, 5073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4392 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:20,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 14706 Invalid, 5073 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 4392 Invalid, 3 Unknown, 672 Unchecked, 25.1s Time] [2022-11-03 03:57:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8834 states. [2022-11-03 03:57:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8834 to 8483. [2022-11-03 03:57:21,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8483 states, 5524 states have (on average 1.3452208544532946) internal successors, (7431), 5739 states have internal predecessors, (7431), 2016 states have call successors, (2016), 958 states have call predecessors, (2016), 942 states have return successors, (2031), 1916 states have call predecessors, (2031), 2015 states have call successors, (2031) [2022-11-03 03:57:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8483 states to 8483 states and 11478 transitions. [2022-11-03 03:57:21,163 INFO L78 Accepts]: Start accepts. Automaton has 8483 states and 11478 transitions. Word has length 530 [2022-11-03 03:57:21,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:21,164 INFO L495 AbstractCegarLoop]: Abstraction has 8483 states and 11478 transitions. [2022-11-03 03:57:21,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 4 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (58), 6 states have call predecessors, (58), 4 states have call successors, (58) [2022-11-03 03:57:21,165 INFO L276 IsEmpty]: Start isEmpty. Operand 8483 states and 11478 transitions. [2022-11-03 03:57:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-11-03 03:57:21,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:21,197 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:21,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:57:21,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:21,423 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:21,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:21,424 INFO L85 PathProgramCache]: Analyzing trace with hash 760857449, now seen corresponding path program 1 times [2022-11-03 03:57:21,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:21,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859494832] [2022-11-03 03:57:21,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:21,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2593 trivial. 0 not checked. [2022-11-03 03:57:22,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:22,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859494832] [2022-11-03 03:57:22,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859494832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:57:22,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:57:22,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:57:22,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003053526] [2022-11-03 03:57:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:57:22,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:57:22,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:57:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:57:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:57:22,392 INFO L87 Difference]: Start difference. First operand 8483 states and 11478 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2022-11-03 03:57:24,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:57:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:57:28,272 INFO L93 Difference]: Finished difference Result 16983 states and 22978 transitions. [2022-11-03 03:57:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:57:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 535 [2022-11-03 03:57:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:57:28,307 INFO L225 Difference]: With dead ends: 16983 [2022-11-03 03:57:28,307 INFO L226 Difference]: Without dead ends: 8555 [2022-11-03 03:57:28,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:57:28,332 INFO L413 NwaCegarLoop]: 1466 mSDtfsCounter, 17 mSDsluCounter, 3313 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4350 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:57:28,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 4350 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 696 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-11-03 03:57:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2022-11-03 03:57:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 8495. [2022-11-03 03:57:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8495 states, 5536 states have (on average 1.3444725433526012) internal successors, (7443), 5751 states have internal predecessors, (7443), 2016 states have call successors, (2016), 958 states have call predecessors, (2016), 942 states have return successors, (2031), 1916 states have call predecessors, (2031), 2015 states have call successors, (2031) [2022-11-03 03:57:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8495 states to 8495 states and 11490 transitions. [2022-11-03 03:57:28,969 INFO L78 Accepts]: Start accepts. Automaton has 8495 states and 11490 transitions. Word has length 535 [2022-11-03 03:57:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:57:28,970 INFO L495 AbstractCegarLoop]: Abstraction has 8495 states and 11490 transitions. [2022-11-03 03:57:28,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2022-11-03 03:57:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 8495 states and 11490 transitions. [2022-11-03 03:57:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2022-11-03 03:57:29,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:57:29,022 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:57:29,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:57:29,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:57:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:57:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1208180788, now seen corresponding path program 1 times [2022-11-03 03:57:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:57:29,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122919748] [2022-11-03 03:57:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:57:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 2840 trivial. 0 not checked. [2022-11-03 03:57:31,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:57:31,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122919748] [2022-11-03 03:57:31,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122919748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:57:31,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939255803] [2022-11-03 03:57:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:57:31,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:57:31,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:57:31,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:57:31,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_86e1b32a-81ac-4cdd-8b8d-07ef60507b23/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:57:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:57:33,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 5133 conjuncts, 226 conjunts are in the unsatisfiable core [2022-11-03 03:57:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:57:33,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:57:33,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 03:57:33,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:57:33,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:57:33,608 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:57:33,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 03:57:33,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 03:57:33,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:57:33,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:57:33,777 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:57:33,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 03:57:33,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 03:57:33,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:57:33,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 03:57:34,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:57:34,387 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:57:34,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 03:57:34,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-11-03 03:57:35,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:35,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 03:57:35,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-11-03 03:57:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:35,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 03:57:35,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-11-03 03:57:36,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:57:36,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 03:57:36,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-03 03:57:36,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:57:36,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 03:57:43,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 03:57:44,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-03 03:57:44,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 03:57:48,387 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 03:57:48,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 13 [2022-11-03 03:57:48,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-03 03:57:48,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 03:57:48,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2022-11-03 03:57:48,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-03 03:57:48,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 03:57:55,220 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-03 03:57:55,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:57:55,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 03:58:02,823 INFO L356 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-03 03:58:02,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 83 [2022-11-03 03:58:02,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2022-11-03 03:58:02,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-11-03 03:59:16,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-03 03:59:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 930 proven. 98 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2022-11-03 03:59:16,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:59:43,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939255803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:59:43,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215010262] [2022-11-03 03:59:43,083 INFO L159 IcfgInterpreter]: Started Sifa with 219 locations of interest [2022-11-03 03:59:43,083 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:59:43,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:59:43,098 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:59:43,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:00:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:04,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:00:05,339 INFO L244 Elim1Store]: Index analysis took 1941 ms