./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 03:43:08,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:43:08,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:43:08,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:43:08,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:43:08,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:43:08,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:43:08,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:43:08,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:43:08,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:43:08,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:43:08,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:43:08,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:43:08,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:43:08,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:43:08,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:43:08,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:43:08,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:43:08,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:43:08,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:43:08,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:43:08,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:43:08,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:43:08,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:43:08,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:43:08,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:43:08,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:43:08,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:43:08,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:43:08,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:43:08,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:43:08,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:43:08,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:43:08,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:43:08,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:43:08,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:43:08,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:43:08,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:43:08,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:43:08,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:43:08,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:43:08,659 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 03:43:08,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:43:08,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:43:08,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:43:08,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:43:08,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:43:08,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:43:08,719 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:43:08,720 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:43:08,720 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:43:08,720 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:43:08,721 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:43:08,722 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:43:08,722 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:43:08,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:43:08,723 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:43:08,723 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:43:08,723 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:43:08,723 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:43:08,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:43:08,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:43:08,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:43:08,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:43:08,726 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:43:08,726 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:43:08,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:43:08,726 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:43:08,727 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:43:08,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:43:08,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:43:08,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:08,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:43:08,730 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:43:08,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:43:08,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:43:08,731 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:43:08,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:43:08,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:43:08,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:43:08,732 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_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d [2022-11-03 03:43:09,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:43:09,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:43:09,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:43:09,185 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:43:09,186 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:43:09,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2022-11-03 03:43:09,278 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/data/55638b4cd/b72886cc451b4533b4e14aeabd8b4de0/FLAG34f6534b6 [2022-11-03 03:43:10,496 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:43:10,497 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2022-11-03 03:43:10,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/data/55638b4cd/b72886cc451b4533b4e14aeabd8b4de0/FLAG34f6534b6 [2022-11-03 03:43:10,831 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/data/55638b4cd/b72886cc451b4533b4e14aeabd8b4de0 [2022-11-03 03:43:10,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:43:10,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:43:10,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:10,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:43:10,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:43:10,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:10" (1/1) ... [2022-11-03 03:43:10,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25cbe658 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:10, skipping insertion in model container [2022-11-03 03:43:10,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:43:10" (1/1) ... [2022-11-03 03:43:10,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:43:11,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:43:12,431 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2022-11-03 03:43:13,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:13,836 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:43:14,080 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2022-11-03 03:43:14,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:43:14,547 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:43:14,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14 WrapperNode [2022-11-03 03:43:14,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:43:14,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:14,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:43:14,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:43:14,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:14,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:14,939 INFO L138 Inliner]: procedures = 239, calls = 2983, calls flagged for inlining = 111, calls inlined = 96, statements flattened = 5266 [2022-11-03 03:43:14,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:43:14,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:43:14,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:43:14,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:43:14,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:14,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,419 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:43:15,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:43:15,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:43:15,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:43:15,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (1/1) ... [2022-11-03 03:43:15,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:43:15,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:43:15,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:43:15,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:43:15,586 INFO L130 BoogieDeclarations]: Found specification of procedure at76_hw_scan [2022-11-03 03:43:15,587 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_hw_scan [2022-11-03 03:43:15,587 INFO L130 BoogieDeclarations]: Found specification of procedure at76_dfu_get_status [2022-11-03 03:43:15,587 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_dfu_get_status [2022-11-03 03:43:15,587 INFO L130 BoogieDeclarations]: Found specification of procedure at76_join [2022-11-03 03:43:15,587 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_join [2022-11-03 03:43:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 03:43:15,588 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 03:43:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-03 03:43:15,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-03 03:43:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 03:43:15,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 03:43:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2022-11-03 03:43:15,589 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2022-11-03 03:43:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure at76_submit_rx_urb [2022-11-03 03:43:15,590 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_submit_rx_urb [2022-11-03 03:43:15,590 INFO L130 BoogieDeclarations]: Found specification of procedure at76_add_interface [2022-11-03 03:43:15,590 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_add_interface [2022-11-03 03:43:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_timeout [2022-11-03 03:43:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_timeout [2022-11-03 03:43:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 03:43:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 03:43:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-03 03:43:15,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-03 03:43:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure at76_bss_info_changed [2022-11-03 03:43:15,592 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_bss_info_changed [2022-11-03 03:43:15,592 INFO L130 BoogieDeclarations]: Found specification of procedure at76_wait_completion [2022-11-03 03:43:15,592 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_wait_completion [2022-11-03 03:43:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 03:43:15,593 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 03:43:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-03 03:43:15,594 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-03 03:43:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 03:43:15,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 03:43:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-03 03:43:15,594 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-03 03:43:15,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:43:15,595 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:43:15,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:43:15,596 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 03:43:15,596 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 03:43:15,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:43:15,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-03 03:43:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-03 03:43:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure at76_delete_device [2022-11-03 03:43:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_delete_device [2022-11-03 03:43:15,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2022-11-03 03:43:15,598 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_mib [2022-11-03 03:43:15,599 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_mib [2022-11-03 03:43:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_radio [2022-11-03 03:43:15,600 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_radio [2022-11-03 03:43:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:43:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 03:43:15,600 INFO L130 BoogieDeclarations]: Found specification of procedure led_trigger_event [2022-11-03 03:43:15,601 INFO L138 BoogieDeclarations]: Found implementation of procedure led_trigger_event [2022-11-03 03:43:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_card_command [2022-11-03 03:43:15,601 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_card_command [2022-11-03 03:43:15,601 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_cmd_status [2022-11-03 03:43:15,601 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_cmd_status [2022-11-03 03:43:15,602 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2022-11-03 03:43:15,603 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2022-11-03 03:43:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-03 03:43:15,603 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-03 03:43:15,603 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 03:43:15,603 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 03:43:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_delayed_work [2022-11-03 03:43:15,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_delayed_work [2022-11-03 03:43:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-03 03:43:15,604 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-03 03:43:15,604 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 03:43:15,605 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 03:43:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-03 03:43:15,606 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-03 03:43:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_mib [2022-11-03 03:43:15,606 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_mib [2022-11-03 03:43:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 03:43:15,607 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 03:43:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-03 03:43:15,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-03 03:43:15,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-03 03:43:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 03:43:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_pm_mode [2022-11-03 03:43:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_pm_mode [2022-11-03 03:43:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_key [2022-11-03 03:43:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_key [2022-11-03 03:43:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure at76_is_505a [2022-11-03 03:43:15,610 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_is_505a [2022-11-03 03:43:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:43:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_hw_cfg [2022-11-03 03:43:15,612 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_hw_cfg [2022-11-03 03:43:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure at76_config [2022-11-03 03:43:15,613 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_config [2022-11-03 03:43:15,613 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-03 03:43:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-03 03:43:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-03 03:43:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-03 03:43:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-03 03:43:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-03 03:43:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 03:43:15,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 03:43:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2022-11-03 03:43:15,615 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2022-11-03 03:43:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-03 03:43:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-03 03:43:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_op_mode [2022-11-03 03:43:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_op_mode [2022-11-03 03:43:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure at76_remove_interface [2022-11-03 03:43:15,617 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_remove_interface [2022-11-03 03:43:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2022-11-03 03:43:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2022-11-03 03:43:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 03:43:15,622 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 03:43:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:43:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 03:43:15,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 03:43:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure wiphy_name [2022-11-03 03:43:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure wiphy_name [2022-11-03 03:43:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2022-11-03 03:43:15,627 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2022-11-03 03:43:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:43:15,634 INFO L130 BoogieDeclarations]: Found specification of procedure at76_start_monitor [2022-11-03 03:43:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_start_monitor [2022-11-03 03:43:15,634 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_stop_queues [2022-11-03 03:43:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_stop_queues [2022-11-03 03:43:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2022-11-03 03:43:15,635 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2022-11-03 03:43:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:43:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2022-11-03 03:43:15,635 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2022-11-03 03:43:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:43:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-03 03:43:15,636 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-03 03:43:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-03 03:43:15,636 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-03 03:43:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 03:43:15,637 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 03:43:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-03 03:43:15,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-03 03:43:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure at76_configure_filter [2022-11-03 03:43:15,637 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_configure_filter [2022-11-03 03:43:15,637 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 03:43:15,638 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 03:43:15,638 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_work [2022-11-03 03:43:15,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_work [2022-11-03 03:43:15,638 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2022-11-03 03:43:15,638 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2022-11-03 03:43:15,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:43:15,639 INFO L130 BoogieDeclarations]: Found specification of procedure at76_mac80211_tx [2022-11-03 03:43:15,639 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_mac80211_tx [2022-11-03 03:43:15,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:43:15,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:43:15,640 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2022-11-03 03:43:15,640 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2022-11-03 03:43:16,919 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:43:16,934 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:43:17,350 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 03:43:29,072 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:43:31,027 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:43:31,027 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:43:31,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:31 BoogieIcfgContainer [2022-11-03 03:43:31,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:43:31,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:43:31,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:43:31,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:43:31,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:43:10" (1/3) ... [2022-11-03 03:43:31,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b822ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:31, skipping insertion in model container [2022-11-03 03:43:31,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:43:14" (2/3) ... [2022-11-03 03:43:31,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b822ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:43:31, skipping insertion in model container [2022-11-03 03:43:31,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:43:31" (3/3) ... [2022-11-03 03:43:31,049 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2022-11-03 03:43:31,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:43:31,074 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:43:31,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:43:31,218 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;@6edad82a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:43:31,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:43:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 991 states, 626 states have (on average 1.351437699680511) internal successors, (846), 650 states have internal predecessors, (846), 296 states have call successors, (296), 68 states have call predecessors, (296), 67 states have return successors, (291), 290 states have call predecessors, (291), 291 states have call successors, (291) [2022-11-03 03:43:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 03:43:31,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:31,251 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:31,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:31,260 INFO L85 PathProgramCache]: Analyzing trace with hash -717879809, now seen corresponding path program 1 times [2022-11-03 03:43:31,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:31,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814622853] [2022-11-03 03:43:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-03 03:43:32,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814622853] [2022-11-03 03:43:32,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814622853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:32,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:32,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:32,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125166169] [2022-11-03 03:43:32,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:32,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:32,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:32,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:32,865 INFO L87 Difference]: Start difference. First operand has 991 states, 626 states have (on average 1.351437699680511) internal successors, (846), 650 states have internal predecessors, (846), 296 states have call successors, (296), 68 states have call predecessors, (296), 67 states have return successors, (291), 290 states have call predecessors, (291), 291 states have call successors, (291) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 03:43:38,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:39,206 INFO L93 Difference]: Finished difference Result 2903 states and 4211 transitions. [2022-11-03 03:43:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:39,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 70 [2022-11-03 03:43:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:39,250 INFO L225 Difference]: With dead ends: 2903 [2022-11-03 03:43:39,250 INFO L226 Difference]: Without dead ends: 1919 [2022-11-03 03:43:39,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:39,268 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 1358 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1358 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:39,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1358 Valid, 2790 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 338 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-03 03:43:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-11-03 03:43:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1916. [2022-11-03 03:43:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1219 states have (on average 1.3371616078753077) internal successors, (1630), 1253 states have internal predecessors, (1630), 564 states have call successors, (564), 133 states have call predecessors, (564), 132 states have return successors, (563), 561 states have call predecessors, (563), 563 states have call successors, (563) [2022-11-03 03:43:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2757 transitions. [2022-11-03 03:43:39,563 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2757 transitions. Word has length 70 [2022-11-03 03:43:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:39,565 INFO L495 AbstractCegarLoop]: Abstraction has 1916 states and 2757 transitions. [2022-11-03 03:43:39,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-03 03:43:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2757 transitions. [2022-11-03 03:43:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 03:43:39,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:39,585 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:39,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:43:39,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:39,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:39,586 INFO L85 PathProgramCache]: Analyzing trace with hash -415776491, now seen corresponding path program 1 times [2022-11-03 03:43:39,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:39,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984047948] [2022-11-03 03:43:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:39,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-03 03:43:41,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:41,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984047948] [2022-11-03 03:43:41,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984047948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:41,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:41,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:43:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310092317] [2022-11-03 03:43:41,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:41,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:43:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:41,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:43:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:43:41,104 INFO L87 Difference]: Start difference. First operand 1916 states and 2757 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:43:43,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:49,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:50,320 INFO L93 Difference]: Finished difference Result 3802 states and 5481 transitions. [2022-11-03 03:43:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:43:50,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 82 [2022-11-03 03:43:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:50,351 INFO L225 Difference]: With dead ends: 3802 [2022-11-03 03:43:50,351 INFO L226 Difference]: Without dead ends: 3796 [2022-11-03 03:43:50,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:43:50,356 INFO L413 NwaCegarLoop]: 1530 mSDtfsCounter, 1376 mSDsluCounter, 3071 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:50,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1376 Valid, 4283 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 508 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2022-11-03 03:43:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2022-11-03 03:43:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 3785. [2022-11-03 03:43:50,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 2406 states have (on average 1.3374896093100581) internal successors, (3218), 2474 states have internal predecessors, (3218), 1114 states have call successors, (1114), 265 states have call predecessors, (1114), 264 states have return successors, (1125), 1109 states have call predecessors, (1125), 1113 states have call successors, (1125) [2022-11-03 03:43:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5457 transitions. [2022-11-03 03:43:50,709 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5457 transitions. Word has length 82 [2022-11-03 03:43:50,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:50,710 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 5457 transitions. [2022-11-03 03:43:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-03 03:43:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5457 transitions. [2022-11-03 03:43:50,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 03:43:50,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:50,721 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:50,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:43:50,722 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:50,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1342921544, now seen corresponding path program 1 times [2022-11-03 03:43:50,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306756410] [2022-11-03 03:43:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:50,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-11-03 03:43:51,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306756410] [2022-11-03 03:43:51,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306756410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:51,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:51,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204294999] [2022-11-03 03:43:51,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:51,320 INFO L87 Difference]: Start difference. First operand 3785 states and 5457 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:58,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:43:58,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:43:58,733 INFO L93 Difference]: Finished difference Result 9077 states and 13034 transitions. [2022-11-03 03:43:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:43:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2022-11-03 03:43:58,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:43:58,777 INFO L225 Difference]: With dead ends: 9077 [2022-11-03 03:43:58,777 INFO L226 Difference]: Without dead ends: 5313 [2022-11-03 03:43:58,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:58,800 INFO L413 NwaCegarLoop]: 1361 mSDtfsCounter, 578 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 2529 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:43:58,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 2529 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 382 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 03:43:58,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2022-11-03 03:43:59,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 5304. [2022-11-03 03:43:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5304 states, 3382 states have (on average 1.335304553518628) internal successors, (4516), 3462 states have internal predecessors, (4516), 1529 states have call successors, (1529), 393 states have call predecessors, (1529), 392 states have return successors, (1548), 1520 states have call predecessors, (1548), 1528 states have call successors, (1548) [2022-11-03 03:43:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5304 states to 5304 states and 7593 transitions. [2022-11-03 03:43:59,292 INFO L78 Accepts]: Start accepts. Automaton has 5304 states and 7593 transitions. Word has length 123 [2022-11-03 03:43:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:43:59,292 INFO L495 AbstractCegarLoop]: Abstraction has 5304 states and 7593 transitions. [2022-11-03 03:43:59,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 03:43:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 5304 states and 7593 transitions. [2022-11-03 03:43:59,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 03:43:59,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:43:59,308 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:43:59,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:43:59,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:43:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:43:59,309 INFO L85 PathProgramCache]: Analyzing trace with hash -381529991, now seen corresponding path program 1 times [2022-11-03 03:43:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:43:59,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492703053] [2022-11-03 03:43:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:43:59,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:43:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:43:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-03 03:43:59,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:43:59,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492703053] [2022-11-03 03:43:59,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492703053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:43:59,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:43:59,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:43:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195323967] [2022-11-03 03:43:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:43:59,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:43:59,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:43:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:43:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:43:59,936 INFO L87 Difference]: Start difference. First operand 5304 states and 7593 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:44:01,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:05,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:08,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:09,115 INFO L93 Difference]: Finished difference Result 13247 states and 18934 transitions. [2022-11-03 03:44:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:44:09,116 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 124 [2022-11-03 03:44:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:09,183 INFO L225 Difference]: With dead ends: 13247 [2022-11-03 03:44:09,183 INFO L226 Difference]: Without dead ends: 7973 [2022-11-03 03:44:09,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:44:09,221 INFO L413 NwaCegarLoop]: 1820 mSDtfsCounter, 931 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:09,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 3037 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 391 Invalid, 1 Unknown, 0 Unchecked, 8.6s Time] [2022-11-03 03:44:09,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2022-11-03 03:44:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 7964. [2022-11-03 03:44:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7964 states, 5105 states have (on average 1.3377081292850146) internal successors, (6829), 5245 states have internal predecessors, (6829), 2257 states have call successors, (2257), 602 states have call predecessors, (2257), 601 states have return successors, (2280), 2244 states have call predecessors, (2280), 2256 states have call successors, (2280) [2022-11-03 03:44:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7964 states to 7964 states and 11366 transitions. [2022-11-03 03:44:09,837 INFO L78 Accepts]: Start accepts. Automaton has 7964 states and 11366 transitions. Word has length 124 [2022-11-03 03:44:09,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:09,838 INFO L495 AbstractCegarLoop]: Abstraction has 7964 states and 11366 transitions. [2022-11-03 03:44:09,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 03:44:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7964 states and 11366 transitions. [2022-11-03 03:44:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 03:44:09,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:09,853 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:09,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:44:09,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 901866756, now seen corresponding path program 1 times [2022-11-03 03:44:09,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:09,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082147508] [2022-11-03 03:44:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:10,386 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-11-03 03:44:10,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:10,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082147508] [2022-11-03 03:44:10,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082147508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:10,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:10,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:44:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646146043] [2022-11-03 03:44:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:10,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:44:10,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:44:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:44:10,395 INFO L87 Difference]: Start difference. First operand 7964 states and 11366 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:44:11,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:13,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:18,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:18,589 INFO L93 Difference]: Finished difference Result 12034 states and 17160 transitions. [2022-11-03 03:44:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:44:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 143 [2022-11-03 03:44:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:18,617 INFO L225 Difference]: With dead ends: 12034 [2022-11-03 03:44:18,618 INFO L226 Difference]: Without dead ends: 4100 [2022-11-03 03:44:18,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:44:18,650 INFO L413 NwaCegarLoop]: 1253 mSDtfsCounter, 5 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:18,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 2500 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2022-11-03 03:44:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2022-11-03 03:44:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 4052. [2022-11-03 03:44:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4052 states, 2604 states have (on average 1.3398617511520738) internal successors, (3489), 2672 states have internal predecessors, (3489), 1140 states have call successors, (1140), 308 states have call predecessors, (1140), 307 states have return successors, (1151), 1135 states have call predecessors, (1151), 1139 states have call successors, (1151) [2022-11-03 03:44:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4052 states to 4052 states and 5780 transitions. [2022-11-03 03:44:18,891 INFO L78 Accepts]: Start accepts. Automaton has 4052 states and 5780 transitions. Word has length 143 [2022-11-03 03:44:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:18,892 INFO L495 AbstractCegarLoop]: Abstraction has 4052 states and 5780 transitions. [2022-11-03 03:44:18,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:44:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4052 states and 5780 transitions. [2022-11-03 03:44:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-03 03:44:18,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:18,900 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:18,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:44:18,901 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:18,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1105440751, now seen corresponding path program 1 times [2022-11-03 03:44:18,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:18,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873670850] [2022-11-03 03:44:18,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:18,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-11-03 03:44:20,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873670850] [2022-11-03 03:44:20,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873670850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:20,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:20,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:44:20,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839529968] [2022-11-03 03:44:20,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:20,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:44:20,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:44:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:44:20,215 INFO L87 Difference]: Start difference. First operand 4052 states and 5780 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:44:21,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:23,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:27,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:32,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:33,167 INFO L93 Difference]: Finished difference Result 8069 states and 11531 transitions. [2022-11-03 03:44:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:44:33,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 142 [2022-11-03 03:44:33,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:33,197 INFO L225 Difference]: With dead ends: 8069 [2022-11-03 03:44:33,197 INFO L226 Difference]: Without dead ends: 4082 [2022-11-03 03:44:33,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:44:33,216 INFO L413 NwaCegarLoop]: 1249 mSDtfsCounter, 2 mSDsluCounter, 4219 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4979 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:33,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4979 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 674 Invalid, 2 Unknown, 0 Unchecked, 12.8s Time] [2022-11-03 03:44:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2022-11-03 03:44:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4072. [2022-11-03 03:44:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 2618 states have (on average 1.338044308632544) internal successors, (3503), 2688 states have internal predecessors, (3503), 1140 states have call successors, (1140), 308 states have call predecessors, (1140), 313 states have return successors, (1161), 1139 states have call predecessors, (1161), 1139 states have call successors, (1161) [2022-11-03 03:44:33,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 5804 transitions. [2022-11-03 03:44:33,429 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 5804 transitions. Word has length 142 [2022-11-03 03:44:33,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:33,430 INFO L495 AbstractCegarLoop]: Abstraction has 4072 states and 5804 transitions. [2022-11-03 03:44:33,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-03 03:44:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 5804 transitions. [2022-11-03 03:44:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-03 03:44:33,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:33,440 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:33,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:44:33,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -334644252, now seen corresponding path program 1 times [2022-11-03 03:44:33,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:33,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012337202] [2022-11-03 03:44:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-11-03 03:44:34,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012337202] [2022-11-03 03:44:34,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012337202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:34,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:44:34,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:44:34,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361005122] [2022-11-03 03:44:34,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:34,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:44:34,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:34,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:44:34,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:44:34,104 INFO L87 Difference]: Start difference. First operand 4072 states and 5804 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 03:44:35,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:39,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:40,077 INFO L93 Difference]: Finished difference Result 9618 states and 13677 transitions. [2022-11-03 03:44:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:44:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 143 [2022-11-03 03:44:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:40,111 INFO L225 Difference]: With dead ends: 9618 [2022-11-03 03:44:40,111 INFO L226 Difference]: Without dead ends: 5611 [2022-11-03 03:44:40,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:44:40,131 INFO L413 NwaCegarLoop]: 1699 mSDtfsCounter, 1340 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:40,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 2615 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2022-11-03 03:44:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2022-11-03 03:44:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 5597. [2022-11-03 03:44:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 3613 states have (on average 1.3368391918073623) internal successors, (4830), 3714 states have internal predecessors, (4830), 1537 states have call successors, (1537), 438 states have call predecessors, (1537), 446 states have return successors, (1567), 1537 states have call predecessors, (1567), 1536 states have call successors, (1567) [2022-11-03 03:44:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 7934 transitions. [2022-11-03 03:44:40,444 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 7934 transitions. Word has length 143 [2022-11-03 03:44:40,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:40,445 INFO L495 AbstractCegarLoop]: Abstraction has 5597 states and 7934 transitions. [2022-11-03 03:44:40,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-03 03:44:40,445 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 7934 transitions. [2022-11-03 03:44:40,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-03 03:44:40,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:40,454 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:40,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:44:40,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:40,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash 568214379, now seen corresponding path program 1 times [2022-11-03 03:44:40,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:40,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166887222] [2022-11-03 03:44:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:40,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-11-03 03:44:41,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:44:41,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166887222] [2022-11-03 03:44:41,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166887222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:44:41,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841135572] [2022-11-03 03:44:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:44:41,912 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:44:41,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:44:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:44:43,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 5226 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:44:43,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:44:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-03 03:44:44,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:44:44,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841135572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:44:44,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:44:44,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 03:44:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684913258] [2022-11-03 03:44:44,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:44:44,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:44:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:44:44,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:44:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:44:44,107 INFO L87 Difference]: Start difference. First operand 5597 states and 7934 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:44:46,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:47,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:52,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:57,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:44:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:44:58,238 INFO L93 Difference]: Finished difference Result 16635 states and 23582 transitions. [2022-11-03 03:44:58,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:44:58,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 146 [2022-11-03 03:44:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:44:58,339 INFO L225 Difference]: With dead ends: 16635 [2022-11-03 03:44:58,339 INFO L226 Difference]: Without dead ends: 16629 [2022-11-03 03:44:58,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:44:58,355 INFO L413 NwaCegarLoop]: 2544 mSDtfsCounter, 2685 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2685 SdHoareTripleChecker+Valid, 4714 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:44:58,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2685 Valid, 4714 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1217 Invalid, 1 Unknown, 0 Unchecked, 13.6s Time] [2022-11-03 03:44:58,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16629 states. [2022-11-03 03:44:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16629 to 16500. [2022-11-03 03:44:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16500 states, 10638 states have (on average 1.3378454596728708) internal successors, (14232), 10951 states have internal predecessors, (14232), 4549 states have call successors, (4549), 1286 states have call predecessors, (4549), 1312 states have return successors, (4638), 4539 states have call predecessors, (4638), 4548 states have call successors, (4638) [2022-11-03 03:44:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16500 states to 16500 states and 23419 transitions. [2022-11-03 03:44:59,399 INFO L78 Accepts]: Start accepts. Automaton has 16500 states and 23419 transitions. Word has length 146 [2022-11-03 03:44:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:44:59,399 INFO L495 AbstractCegarLoop]: Abstraction has 16500 states and 23419 transitions. [2022-11-03 03:44:59,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-03 03:44:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 16500 states and 23419 transitions. [2022-11-03 03:44:59,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 03:44:59,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:44:59,422 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:44:59,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:44:59,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:44:59,651 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:44:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:44:59,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1337146497, now seen corresponding path program 1 times [2022-11-03 03:44:59,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:44:59,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621532504] [2022-11-03 03:44:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:44:59,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:44:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-03 03:45:01,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621532504] [2022-11-03 03:45:01,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621532504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:45:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597982587] [2022-11-03 03:45:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:01,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:01,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:45:01,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:45:01,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:45:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 5362 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 03:45:03,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 03:45:03,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:45:03,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597982587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:03,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:45:03,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-03 03:45:03,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96960615] [2022-11-03 03:45:03,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:03,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:03,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:03,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:45:03,415 INFO L87 Difference]: Start difference. First operand 16500 states and 23419 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 03:45:07,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:10,256 INFO L93 Difference]: Finished difference Result 35602 states and 50539 transitions. [2022-11-03 03:45:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:10,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 158 [2022-11-03 03:45:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:10,359 INFO L225 Difference]: With dead ends: 35602 [2022-11-03 03:45:10,360 INFO L226 Difference]: Without dead ends: 19035 [2022-11-03 03:45:10,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:45:10,429 INFO L413 NwaCegarLoop]: 1567 mSDtfsCounter, 1296 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 2804 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:10,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 2804 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 340 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-03 03:45:10,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2022-11-03 03:45:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 18087. [2022-11-03 03:45:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18087 states, 11621 states have (on average 1.332673608123225) internal successors, (15487), 11976 states have internal predecessors, (15487), 5041 states have call successors, (5041), 1395 states have call predecessors, (5041), 1424 states have return successors, (5119), 5034 states have call predecessors, (5119), 5040 states have call successors, (5119) [2022-11-03 03:45:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18087 states to 18087 states and 25647 transitions. [2022-11-03 03:45:11,641 INFO L78 Accepts]: Start accepts. Automaton has 18087 states and 25647 transitions. Word has length 158 [2022-11-03 03:45:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:11,642 INFO L495 AbstractCegarLoop]: Abstraction has 18087 states and 25647 transitions. [2022-11-03 03:45:11,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-03 03:45:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 18087 states and 25647 transitions. [2022-11-03 03:45:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-03 03:45:11,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:11,672 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:11,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:45:11,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:45:11,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:11,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1971564935, now seen corresponding path program 1 times [2022-11-03 03:45:11,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:11,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455720973] [2022-11-03 03:45:11,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:11,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:12,496 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-11-03 03:45:12,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:12,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455720973] [2022-11-03 03:45:12,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455720973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:12,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:12,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090908] [2022-11-03 03:45:12,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:12,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:12,499 INFO L87 Difference]: Start difference. First operand 18087 states and 25647 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 03:45:14,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:20,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:20,982 INFO L93 Difference]: Finished difference Result 42222 states and 61045 transitions. [2022-11-03 03:45:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:20,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 170 [2022-11-03 03:45:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:21,130 INFO L225 Difference]: With dead ends: 42222 [2022-11-03 03:45:21,130 INFO L226 Difference]: Without dead ends: 24220 [2022-11-03 03:45:21,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:21,207 INFO L413 NwaCegarLoop]: 1682 mSDtfsCounter, 296 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 2999 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:21,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 2999 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 357 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2022-11-03 03:45:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24220 states. [2022-11-03 03:45:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24220 to 18111. [2022-11-03 03:45:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18111 states, 11633 states have (on average 1.3323304392676008) internal successors, (15499), 11988 states have internal predecessors, (15499), 5053 states have call successors, (5053), 1395 states have call predecessors, (5053), 1424 states have return successors, (5131), 5046 states have call predecessors, (5131), 5052 states have call successors, (5131) [2022-11-03 03:45:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18111 states to 18111 states and 25683 transitions. [2022-11-03 03:45:23,179 INFO L78 Accepts]: Start accepts. Automaton has 18111 states and 25683 transitions. Word has length 170 [2022-11-03 03:45:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:23,180 INFO L495 AbstractCegarLoop]: Abstraction has 18111 states and 25683 transitions. [2022-11-03 03:45:23,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-03 03:45:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 18111 states and 25683 transitions. [2022-11-03 03:45:23,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-03 03:45:23,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:23,208 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:23,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:45:23,208 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1502586966, now seen corresponding path program 1 times [2022-11-03 03:45:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:23,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303639892] [2022-11-03 03:45:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-03 03:45:23,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:23,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303639892] [2022-11-03 03:45:23,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303639892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:23,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:23,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545510191] [2022-11-03 03:45:23,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:23,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:23,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:23,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:23,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:23,684 INFO L87 Difference]: Start difference. First operand 18111 states and 25683 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:45:29,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:30,563 INFO L93 Difference]: Finished difference Result 28609 states and 40618 transitions. [2022-11-03 03:45:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:45:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 173 [2022-11-03 03:45:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:30,637 INFO L225 Difference]: With dead ends: 28609 [2022-11-03 03:45:30,637 INFO L226 Difference]: Without dead ends: 18159 [2022-11-03 03:45:30,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:30,677 INFO L413 NwaCegarLoop]: 1250 mSDtfsCounter, 4 mSDsluCounter, 1406 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:30,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2494 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-11-03 03:45:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18159 states. [2022-11-03 03:45:31,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18159 to 18151. [2022-11-03 03:45:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18151 states, 11664 states have (on average 1.3314471879286693) internal successors, (15530), 12028 states have internal predecessors, (15530), 5053 states have call successors, (5053), 1395 states have call predecessors, (5053), 1433 states have return successors, (5140), 5046 states have call predecessors, (5140), 5052 states have call successors, (5140) [2022-11-03 03:45:31,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18151 states to 18151 states and 25723 transitions. [2022-11-03 03:45:31,973 INFO L78 Accepts]: Start accepts. Automaton has 18151 states and 25723 transitions. Word has length 173 [2022-11-03 03:45:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:31,974 INFO L495 AbstractCegarLoop]: Abstraction has 18151 states and 25723 transitions. [2022-11-03 03:45:31,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 03:45:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 18151 states and 25723 transitions. [2022-11-03 03:45:32,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-03 03:45:32,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:32,010 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:45:32,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash -529432396, now seen corresponding path program 1 times [2022-11-03 03:45:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:32,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425196284] [2022-11-03 03:45:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:32,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:33,937 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-03 03:45:33,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:33,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425196284] [2022-11-03 03:45:33,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425196284] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:33,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:33,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:45:33,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673319418] [2022-11-03 03:45:33,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:33,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:45:33,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:33,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:45:33,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:45:33,940 INFO L87 Difference]: Start difference. First operand 18151 states and 25723 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-03 03:45:36,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:45,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:52,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:45:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:45:56,594 INFO L93 Difference]: Finished difference Result 36622 states and 51815 transitions. [2022-11-03 03:45:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:45:56,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) Word has length 174 [2022-11-03 03:45:56,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:45:56,676 INFO L225 Difference]: With dead ends: 36622 [2022-11-03 03:45:56,677 INFO L226 Difference]: Without dead ends: 18556 [2022-11-03 03:45:56,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:45:56,738 INFO L413 NwaCegarLoop]: 1300 mSDtfsCounter, 1956 mSDsluCounter, 2917 mSDsCounter, 0 mSdLazyCounter, 4214 mSolverCounterSat, 1293 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2226 SdHoareTripleChecker+Valid, 3847 SdHoareTripleChecker+Invalid, 5508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1293 IncrementalHoareTripleChecker+Valid, 4214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:45:56,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2226 Valid, 3847 Invalid, 5508 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1293 Valid, 4214 Invalid, 1 Unknown, 0 Unchecked, 21.3s Time] [2022-11-03 03:45:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18556 states. [2022-11-03 03:45:57,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18556 to 17897. [2022-11-03 03:45:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17897 states, 11497 states have (on average 1.328085587544577) internal successors, (15269), 11857 states have internal predecessors, (15269), 4975 states have call successors, (4975), 1370 states have call predecessors, (4975), 1424 states have return successors, (5051), 4986 states have call predecessors, (5051), 4974 states have call successors, (5051) [2022-11-03 03:45:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17897 states to 17897 states and 25295 transitions. [2022-11-03 03:45:57,853 INFO L78 Accepts]: Start accepts. Automaton has 17897 states and 25295 transitions. Word has length 174 [2022-11-03 03:45:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:45:57,854 INFO L495 AbstractCegarLoop]: Abstraction has 17897 states and 25295 transitions. [2022-11-03 03:45:57,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 5 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 4 states have call successors, (25) [2022-11-03 03:45:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 17897 states and 25295 transitions. [2022-11-03 03:45:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-03 03:45:57,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:45:57,889 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:45:57,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:45:57,890 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:45:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:45:57,891 INFO L85 PathProgramCache]: Analyzing trace with hash 529043385, now seen corresponding path program 1 times [2022-11-03 03:45:57,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:45:57,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6413750] [2022-11-03 03:45:57,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:45:57,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:45:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:45:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-03 03:45:58,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:45:58,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6413750] [2022-11-03 03:45:58,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6413750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:45:58,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:45:58,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:45:58,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443463982] [2022-11-03 03:45:58,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:45:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:45:58,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:45:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:45:58,945 INFO L87 Difference]: Start difference. First operand 17897 states and 25295 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2022-11-03 03:46:00,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:03,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:06,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 03:46:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:07,065 INFO L93 Difference]: Finished difference Result 17903 states and 25301 transitions. [2022-11-03 03:46:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:46:07,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) Word has length 178 [2022-11-03 03:46:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:07,165 INFO L225 Difference]: With dead ends: 17903 [2022-11-03 03:46:07,166 INFO L226 Difference]: Without dead ends: 17898 [2022-11-03 03:46:07,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:46:07,179 INFO L413 NwaCegarLoop]: 1251 mSDtfsCounter, 0 mSDsluCounter, 1411 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2502 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:07,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2502 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 325 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2022-11-03 03:46:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17898 states. [2022-11-03 03:46:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17898 to 17898. [2022-11-03 03:46:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17898 states, 11498 states have (on average 1.3280570534005913) internal successors, (15270), 11858 states have internal predecessors, (15270), 4975 states have call successors, (4975), 1370 states have call predecessors, (4975), 1424 states have return successors, (5051), 4986 states have call predecessors, (5051), 4974 states have call successors, (5051) [2022-11-03 03:46:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17898 states to 17898 states and 25296 transitions. [2022-11-03 03:46:08,344 INFO L78 Accepts]: Start accepts. Automaton has 17898 states and 25296 transitions. Word has length 178 [2022-11-03 03:46:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:08,345 INFO L495 AbstractCegarLoop]: Abstraction has 17898 states and 25296 transitions. [2022-11-03 03:46:08,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 1 states have call predecessors, (24), 1 states have call successors, (24) [2022-11-03 03:46:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 17898 states and 25296 transitions. [2022-11-03 03:46:08,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-03 03:46:08,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:08,372 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:08,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:46:08,373 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash 441619614, now seen corresponding path program 1 times [2022-11-03 03:46:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:08,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33062935] [2022-11-03 03:46:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-03 03:46:09,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:09,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33062935] [2022-11-03 03:46:09,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33062935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:46:09,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921206877] [2022-11-03 03:46:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:09,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:09,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:09,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:09,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c6160d8-45c8-47b1-ab48-b394d913bd8c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:46:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:11,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 5356 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:46:11,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:46:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-03 03:46:11,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:46:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-03 03:46:11,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921206877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:46:11,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597332431] [2022-11-03 03:46:11,394 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-11-03 03:46:11,394 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:46:11,399 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:46:11,406 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:46:11,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:46:31,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:46:31,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:46:32,614 INFO L244 Elim1Store]: Index analysis took 2030 ms [2022-11-03 03:49:37,916 WARN L234 SmtUtils]: Spent 3.08m on a formula simplification. DAG size of input: 3703 DAG size of output: 1989 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 03:49:37,928 INFO L356 Elim1Store]: treesize reduction 6563, result has 34.1 percent of original size [2022-11-03 03:49:37,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 285 select indices, 285 select index equivalence classes, 40474 disjoint index pairs (out of 40470 index pairs), introduced 285 new quantified variables, introduced 285 case distinctions, treesize of input 1435 treesize of output 4262 [2022-11-03 03:49:50,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:49:50,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:50:00,946 INFO L244 Elim1Store]: Index analysis took 12255 ms