./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/packet_filter.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/packet_filter.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh --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 32bit --witnessprinter.graph.data.programhash d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f --- 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-2329fc7 [2022-12-14 09:58:31,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:58:31,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:58:31,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:58:31,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:58:31,699 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:58:31,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:58:31,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:58:31,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:58:31,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:58:31,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:58:31,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:58:31,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:58:31,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:58:31,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:58:31,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:58:31,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:58:31,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:58:31,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:58:31,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:58:31,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:58:31,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:58:31,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:58:31,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:58:31,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:58:31,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:58:31,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:58:31,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:58:31,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:58:31,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:58:31,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:58:31,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:58:31,728 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:58:31,729 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:58:31,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:58:31,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:58:31,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:58:31,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:58:31,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:58:31,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:58:31,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:58:31,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:58:31,754 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:58:31,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:58:31,755 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:58:31,755 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:58:31,756 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:58:31,756 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:58:31,756 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:58:31,756 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:58:31,756 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:58:31,757 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:58:31,757 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:58:31,757 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:58:31,757 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:58:31,757 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:58:31,757 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:58:31,758 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:58:31,758 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:58:31,758 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:58:31,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:58:31,759 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:58:31,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:58:31,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:58:31,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:58:31,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:58:31,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:58:31,760 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:58:31,760 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:58:31,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:58:31,761 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:58:31,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:58:31,761 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:58:31,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:58:31,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:58:31,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:58:31,762 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:58:31,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:58:31,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:58:31,762 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:58:31,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:58:31,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:58:31,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:58:31,763 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_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d604fdd8f7c4d34db0106d8a0ff422218ae80e9ee6eb03f691b84d2fcc8ad49f [2022-12-14 09:58:31,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:58:31,941 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:58:31,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:58:31,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:58:31,944 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:58:31,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/heap-data/packet_filter.i [2022-12-14 09:58:34,551 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:58:34,723 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:58:34,724 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/sv-benchmarks/c/heap-data/packet_filter.i [2022-12-14 09:58:34,733 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/data/b85844ec8/b36d8c78a6e1480d8a39a621436b92d7/FLAG251029877 [2022-12-14 09:58:34,743 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/data/b85844ec8/b36d8c78a6e1480d8a39a621436b92d7 [2022-12-14 09:58:34,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:58:34,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:58:34,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:58:34,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:58:34,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:58:34,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:58:34" (1/1) ... [2022-12-14 09:58:34,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8befae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:34, skipping insertion in model container [2022-12-14 09:58:34,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:58:34" (1/1) ... [2022-12-14 09:58:34,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:58:34,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:58:34,952 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_nondet_charp [2022-12-14 09:58:34,958 WARN L237 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_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2022-12-14 09:58:34,964 WARN L237 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_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2022-12-14 09:58:34,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:58:34,975 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:58:34,997 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_nondet_charp [2022-12-14 09:58:35,000 WARN L237 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_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/sv-benchmarks/c/heap-data/packet_filter.i[23925,23938] [2022-12-14 09:58:35,002 WARN L237 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_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/sv-benchmarks/c/heap-data/packet_filter.i[24159,24172] [2022-12-14 09:58:35,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:58:35,022 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:58:35,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35 WrapperNode [2022-12-14 09:58:35,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:58:35,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:58:35,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:58:35,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:58:35,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,055 INFO L138 Inliner]: procedures = 130, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 156 [2022-12-14 09:58:35,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:58:35,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:58:35,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:58:35,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:58:35,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,075 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,076 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:58:35,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:58:35,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:58:35,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:58:35,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (1/1) ... [2022-12-14 09:58:35,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:58:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:35,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:58:35,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:58:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:58:35,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:58:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:58:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:58:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_queue [2022-12-14 09:58:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_queue [2022-12-14 09:58:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 09:58:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:58:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 09:58:35,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_charp [2022-12-14 09:58:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure send [2022-12-14 09:58:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure send [2022-12-14 09:58:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:58:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 09:58:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:58:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:58:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:58:35,232 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:58:35,234 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:58:35,545 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:58:35,602 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:58:35,602 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 09:58:35,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:58:35 BoogieIcfgContainer [2022-12-14 09:58:35,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:58:35,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:58:35,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:58:35,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:58:35,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:58:34" (1/3) ... [2022-12-14 09:58:35,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fbdb2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:58:35, skipping insertion in model container [2022-12-14 09:58:35,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:58:35" (2/3) ... [2022-12-14 09:58:35,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fbdb2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:58:35, skipping insertion in model container [2022-12-14 09:58:35,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:58:35" (3/3) ... [2022-12-14 09:58:35,614 INFO L112 eAbstractionObserver]: Analyzing ICFG packet_filter.i [2022-12-14 09:58:35,634 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:58:35,634 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 09:58:35,669 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:58:35,674 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;@50376c51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:58:35,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 09:58:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:58:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:58:35,687 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:35,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:58:35,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash 297298087, now seen corresponding path program 1 times [2022-12-14 09:58:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955122909] [2022-12-14 09:58:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:35,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:35,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955122909] [2022-12-14 09:58:35,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955122909] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:35,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:35,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:58:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476641250] [2022-12-14 09:58:35,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 09:58:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:35,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 09:58:35,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:58:35,884 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 25 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:35,955 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2022-12-14 09:58:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 09:58:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:58:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:35,962 INFO L225 Difference]: With dead ends: 51 [2022-12-14 09:58:35,962 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 09:58:35,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 09:58:35,967 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:35,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:58:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 09:58:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 09:58:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:58:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-12-14 09:58:35,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 6 [2022-12-14 09:58:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:35,999 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-12-14 09:58:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-12-14 09:58:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:58:36,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:36,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:58:36,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:36,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash -350648386, now seen corresponding path program 1 times [2022-12-14 09:58:36,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:36,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938765946] [2022-12-14 09:58:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:36,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:36,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:36,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938765946] [2022-12-14 09:58:36,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938765946] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:36,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:36,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:58:36,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262872580] [2022-12-14 09:58:36,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:36,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:36,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:36,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:36,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:36,165 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:36,315 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-12-14 09:58:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:58:36,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:58:36,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:36,317 INFO L225 Difference]: With dead ends: 58 [2022-12-14 09:58:36,317 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 09:58:36,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:36,319 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:36,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 76 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:58:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 09:58:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-12-14 09:58:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:58:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-12-14 09:58:36,327 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 7 [2022-12-14 09:58:36,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:36,327 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-12-14 09:58:36,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:36,327 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-12-14 09:58:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:58:36,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:36,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:36,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:58:36,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2014810633, now seen corresponding path program 1 times [2022-12-14 09:58:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:36,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202839512] [2022-12-14 09:58:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:36,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:36,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:36,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202839512] [2022-12-14 09:58:36,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202839512] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:36,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:58:36,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:58:36,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124851272] [2022-12-14 09:58:36,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:58:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:58:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:58:36,410 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:36,580 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-12-14 09:58:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:58:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 09:58:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:36,582 INFO L225 Difference]: With dead ends: 46 [2022-12-14 09:58:36,582 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 09:58:36,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:58:36,584 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:36,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 83 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:58:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 09:58:36,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 09:58:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:58:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-12-14 09:58:36,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 8 [2022-12-14 09:58:36,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:36,591 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-12-14 09:58:36,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-12-14 09:58:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 09:58:36,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:36,592 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:36,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:58:36,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash 218233618, now seen corresponding path program 1 times [2022-12-14 09:58:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:36,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591515048] [2022-12-14 09:58:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:36,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:36,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591515048] [2022-12-14 09:58:36,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591515048] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257873347] [2022-12-14 09:58:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:36,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:36,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:36,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:36,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:58:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:36,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 09:58:36,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:36,987 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:58:36,988 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 09:58:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,020 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 09:58:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,032 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 09:58:37,040 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:58:37,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2022-12-14 09:58:37,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:58:37,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:58:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:37,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:37,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257873347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:37,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [710717120] [2022-12-14 09:58:37,223 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 09:58:37,223 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:37,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:37,230 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:37,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,295 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:58:37,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 09:58:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 09:58:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-12-14 09:58:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,713 INFO L321 Elim1Store]: treesize reduction 148, result has 18.2 percent of original size [2022-12-14 09:58:37,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 73 [2022-12-14 09:58:37,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,805 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:58:37,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 09:58:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,865 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:58:37,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 09:58:37,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:37,911 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 09:58:37,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 51 [2022-12-14 09:58:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 57 [2022-12-14 09:58:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-12-14 09:58:38,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-12-14 09:58:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:58:38,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:58:38,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:38,509 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-12-14 09:58:38,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2022-12-14 09:58:38,636 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:39,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [710717120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:39,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:39,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 10 [2022-12-14 09:58:39,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479327923] [2022-12-14 09:58:39,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:39,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:58:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:39,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:58:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:58:39,469 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:39,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:39,726 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2022-12-14 09:58:39,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:58:39,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 09:58:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:39,727 INFO L225 Difference]: With dead ends: 67 [2022-12-14 09:58:39,727 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 09:58:39,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:58:39,728 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:39,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 58 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:58:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 09:58:39,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2022-12-14 09:58:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:58:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-12-14 09:58:39,734 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 11 [2022-12-14 09:58:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:39,734 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-12-14 09:58:39,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-12-14 09:58:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:58:39,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:39,735 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:39,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:58:39,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:39,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:39,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:39,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1824683723, now seen corresponding path program 1 times [2022-12-14 09:58:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:39,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620281846] [2022-12-14 09:58:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:40,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620281846] [2022-12-14 09:58:40,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620281846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686351627] [2022-12-14 09:58:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:40,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:40,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:58:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 09:58:40,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:40,210 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:58:40,210 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 09:58:40,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,229 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 09:58:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,234 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-12-14 09:58:40,240 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:58:40,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2022-12-14 09:58:40,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:58:40,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:58:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:40,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686351627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742109349] [2022-12-14 09:58:40,351 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 09:58:40,351 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:40,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:40,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:40,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:40,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,395 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:58:40,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 09:58:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 09:58:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-12-14 09:58:40,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,710 INFO L321 Elim1Store]: treesize reduction 148, result has 18.2 percent of original size [2022-12-14 09:58:40,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 73 [2022-12-14 09:58:40,781 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-12-14 09:58:40,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 50 [2022-12-14 09:58:40,832 INFO L321 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2022-12-14 09:58:40,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 29 [2022-12-14 09:58:40,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 09:58:40,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 09:58:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:40,918 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 09:58:40,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 55 [2022-12-14 09:58:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 57 [2022-12-14 09:58:41,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-12-14 09:58:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,450 INFO L321 Elim1Store]: treesize reduction 148, result has 18.2 percent of original size [2022-12-14 09:58:41,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 73 [2022-12-14 09:58:41,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,506 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:58:41,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 18 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 47 [2022-12-14 09:58:41,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,558 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:58:41,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 09:58:41,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,589 INFO L321 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-12-14 09:58:41,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 09:58:41,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-12-14 09:58:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:41,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-14 09:58:41,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:58:42,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1742109349] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:58:42,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:58:42,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4, 4] total 11 [2022-12-14 09:58:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983878830] [2022-12-14 09:58:42,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:58:42,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:58:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:58:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:58:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:58:42,707 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:58:43,231 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-12-14 09:58:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:58:43,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:58:43,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:58:43,232 INFO L225 Difference]: With dead ends: 55 [2022-12-14 09:58:43,232 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 09:58:43,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:58:43,233 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:58:43,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:58:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 09:58:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-12-14 09:58:43,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 09:58:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-12-14 09:58:43,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 12 [2022-12-14 09:58:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:58:43,237 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-12-14 09:58:43,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:58:43,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-12-14 09:58:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:58:43,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:58:43,238 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:58:43,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:58:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:43,440 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:58:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:58:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash 534989632, now seen corresponding path program 1 times [2022-12-14 09:58:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:58:43,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312737243] [2022-12-14 09:58:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:58:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:44,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:58:44,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312737243] [2022-12-14 09:58:44,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312737243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:58:44,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068359049] [2022-12-14 09:58:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:58:44,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:58:44,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:58:44,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:58:44,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61e0ebf4-f4df-4bf1-b866-a1390abc5e50/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:58:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:58:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 09:58:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:58:44,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-12-14 09:58:44,517 INFO L321 Elim1Store]: treesize reduction 40, result has 42.9 percent of original size [2022-12-14 09:58:44,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2022-12-14 09:58:44,545 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-12-14 09:58:44,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-12-14 09:58:44,576 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-12-14 09:58:44,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-12-14 09:58:44,587 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:58:44,626 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:58:44,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 60 [2022-12-14 09:58:44,637 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:58:44,647 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-12-14 09:58:44,657 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2022-12-14 09:58:44,725 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:58:44,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 66 treesize of output 19 [2022-12-14 09:58:44,744 INFO L350 Elim1Store]: Elim1 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 9 treesize of output 7 [2022-12-14 09:58:44,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:58:44,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 47 treesize of output 5 [2022-12-14 09:58:44,803 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:58:45,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 39 [2022-12-14 09:58:45,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:45,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-12-14 09:58:45,099 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2022-12-14 09:58:45,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:58:45,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 55 [2022-12-14 09:58:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:45,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:58:45,635 INFO L321 Elim1Store]: treesize reduction 41, result has 62.0 percent of original size [2022-12-14 09:58:45,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 91 [2022-12-14 09:58:45,653 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-12-14 09:58:45,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 93 treesize of output 77 [2022-12-14 09:58:45,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 09:58:45,812 INFO L321 Elim1Store]: treesize reduction 107, result has 0.9 percent of original size [2022-12-14 09:58:45,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 1 [2022-12-14 09:58:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:58:45,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068359049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:58:45,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522678110] [2022-12-14 09:58:45,911 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:58:45,911 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:58:45,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:58:45,912 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:58:45,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:58:45,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:45,954 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 09:58:45,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 09:58:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:45,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:45,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 09:58:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-12-14 09:58:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 19 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-12-14 09:58:46,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 42 [2022-12-14 09:58:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,273 INFO L321 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2022-12-14 09:58:46,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 18 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2022-12-14 09:58:46,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,312 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:58:46,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 46 [2022-12-14 09:58:46,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:54,575 WARN L233 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 272 DAG size of output: 179 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 09:58:54,576 INFO L321 Elim1Store]: treesize reduction 744, result has 48.6 percent of original size [2022-12-14 09:58:54,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 1 select indices, 1 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 7 new quantified variables, introduced 42 case distinctions, treesize of input 2189814 treesize of output 386766 [2022-12-14 09:58:57,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:58:57,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-12-14 09:59:00,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2022-12-14 09:59:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:03,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 09:59:07,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:07,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:08,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:08,009 INFO L217 Elim1Store]: Index analysis took 126 ms [2022-12-14 09:59:08,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 38 [2022-12-14 09:59:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:11,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:11,084 INFO L217 Elim1Store]: Index analysis took 106 ms [2022-12-14 09:59:13,189 INFO L321 Elim1Store]: treesize reduction 108, result has 43.8 percent of original size [2022-12-14 09:59:13,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 96 [2022-12-14 09:59:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:19,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:21,842 INFO L321 Elim1Store]: treesize reduction 540, result has 48.6 percent of original size [2022-12-14 09:59:21,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 30 case distinctions, treesize of input 7806 treesize of output 2394 [2022-12-14 09:59:23,665 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:59:23,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:23,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:23,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:23,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:23,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:23,984 INFO L217 Elim1Store]: Index analysis took 215 ms [2022-12-14 09:59:23,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 526 treesize of output 758 [2022-12-14 09:59:24,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 119 [2022-12-14 09:59:24,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:24,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 242 [2022-12-14 09:59:24,216 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:59:24,279 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:59:24,378 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:59:24,444 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:59:24,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:24,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:24,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:24,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:24,729 INFO L217 Elim1Store]: Index analysis took 217 ms [2022-12-14 09:59:24,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 526 treesize of output 758 [2022-12-14 09:59:24,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 119 [2022-12-14 09:59:24,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:24,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:24,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 242 [2022-12-14 09:59:25,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:26,055 INFO L217 Elim1Store]: Index analysis took 880 ms [2022-12-14 09:59:26,261 INFO L321 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2022-12-14 09:59:26,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 18 case distinctions, treesize of input 526 treesize of output 774 [2022-12-14 09:59:26,322 INFO L350 Elim1Store]: Elim1 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 [2022-12-14 09:59:26,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:59:26,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 135 [2022-12-14 09:59:26,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2022-12-14 09:59:26,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:26,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:26,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:26,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:26,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:26,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:26,934 INFO L217 Elim1Store]: Index analysis took 140 ms [2022-12-14 09:59:27,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:59:27,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 563 treesize of output 579 [2022-12-14 09:59:30,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:30,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:30,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:30,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:59:30,974 INFO L217 Elim1Store]: Index analysis took 264 ms [2022-12-14 09:59:30,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 526 treesize of output 758 [2022-12-14 09:59:31,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2022-12-14 09:59:31,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:31,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:31,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:59:31,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 245 [2022-12-14 09:59:31,252 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:59:31,341 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:59:31,404 WARN L207 Elim1Store]: Array PQE input equivalent to false