./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0 --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 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a --- 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-e04fb08 [2022-11-16 20:22:25,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:22:25,542 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:22:25,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:22:25,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:22:25,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:22:25,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:22:25,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:22:25,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:22:25,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:22:25,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:22:25,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:22:25,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:22:25,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:22:25,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:22:25,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:22:25,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:22:25,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:22:25,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:22:25,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:22:25,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:22:25,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:22:25,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:22:25,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:22:25,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:22:25,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:22:25,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:22:25,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:22:25,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:22:25,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:22:25,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:22:25,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:22:25,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:22:25,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:22:25,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:22:25,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:22:25,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:22:25,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:22:25,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:22:25,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:22:25,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:22:25,643 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 20:22:25,677 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:22:25,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:22:25,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:22:25,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:22:25,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:22:25,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:22:25,681 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:22:25,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:22:25,681 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:22:25,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:22:25,682 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:22:25,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:22:25,683 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:22:25,683 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:22:25,683 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:22:25,684 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:22:25,684 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:22:25,684 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:22:25,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:22:25,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:22:25,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:22:25,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:22:25,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:22:25,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:22:25,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:22:25,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:22:25,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:22:25,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:22:25,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:22:25,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:25,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:22:25,690 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:22:25,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:22:25,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:22:25,691 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:22:25,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:22:25,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:22:25,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:22:25,691 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_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01d4ebb86f2bde0df0d47bbd5d9b632b620f2501e68770553e85fb2bb5a7d15a [2022-11-16 20:22:25,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:22:25,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:22:25,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:22:26,000 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:22:26,001 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:22:26,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2022-11-16 20:22:26,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/data/32b41e2ba/5d71f9ed4132463b8c29c1a8ed5256fb/FLAG9845ee638 [2022-11-16 20:22:26,858 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:22:26,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2022-11-16 20:22:26,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/data/32b41e2ba/5d71f9ed4132463b8c29c1a8ed5256fb/FLAG9845ee638 [2022-11-16 20:22:27,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/data/32b41e2ba/5d71f9ed4132463b8c29c1a8ed5256fb [2022-11-16 20:22:27,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:22:27,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:22:27,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:27,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:22:27,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:22:27,410 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:27" (1/1) ... [2022-11-16 20:22:27,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d303a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:27, skipping insertion in model container [2022-11-16 20:22:27,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:22:27" (1/1) ... [2022-11-16 20:22:27,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:22:27,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:22:28,788 WARN L229 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_dede4fab-c612-46fd-aab7-80a34d57abcf/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2022-11-16 20:22:28,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:28,908 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:22:29,227 WARN L229 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_dede4fab-c612-46fd-aab7-80a34d57abcf/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i[191320,191333] [2022-11-16 20:22:29,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:22:29,498 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:22:29,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29 WrapperNode [2022-11-16 20:22:29,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:22:29,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:29,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:22:29,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:22:29,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,666 INFO L138 Inliner]: procedures = 133, calls = 749, calls flagged for inlining = 54, calls inlined = 44, statements flattened = 1391 [2022-11-16 20:22:29,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:22:29,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:22:29,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:22:29,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:22:29,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,800 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:22:29,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:22:29,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:22:29,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:22:29,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (1/1) ... [2022-11-16 20:22:29,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:22:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:22:29,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:22:29,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:22:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-16 20:22:29,913 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-16 20:22:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_init [2022-11-16 20:22:29,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_init [2022-11-16 20:22:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 20:22:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-16 20:22:29,914 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-16 20:22:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 20:22:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 20:22:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:22:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-16 20:22:29,914 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-16 20:22:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2022-11-16 20:22:29,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2022-11-16 20:22:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-16 20:22:29,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-16 20:22:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 20:22:29,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 20:22:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_exit [2022-11-16 20:22:29,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_exit [2022-11-16 20:22:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-16 20:22:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-16 20:22:29,916 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-16 20:22:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-16 20:22:29,916 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-16 20:22:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-16 20:22:29,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:22:29,916 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-16 20:22:29,917 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-16 20:22:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2022-11-16 20:22:29,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2022-11-16 20:22:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-11-16 20:22:29,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-11-16 20:22:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-16 20:22:29,917 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-16 20:22:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2022-11-16 20:22:29,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2022-11-16 20:22:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:22:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-16 20:22:29,918 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-16 20:22:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:22:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-16 20:22:29,918 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-16 20:22:29,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:22:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:22:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2022-11-16 20:22:29,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2022-11-16 20:22:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-16 20:22:29,919 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-16 20:22:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-16 20:22:29,919 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-16 20:22:29,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:22:29,920 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-16 20:22:29,920 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-16 20:22:29,920 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-16 20:22:29,920 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-16 20:22:29,920 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-16 20:22:29,920 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-16 20:22:29,920 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2022-11-16 20:22:29,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2022-11-16 20:22:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:22:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 20:22:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-16 20:22:29,921 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-16 20:22:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-16 20:22:29,921 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-16 20:22:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-16 20:22:29,921 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-16 20:22:29,921 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-16 20:22:29,922 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-16 20:22:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-16 20:22:29,922 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-16 20:22:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-16 20:22:29,922 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-16 20:22:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2022-11-16 20:22:29,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2022-11-16 20:22:29,922 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-16 20:22:29,923 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-16 20:22:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:22:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-16 20:22:29,923 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-16 20:22:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-16 20:22:29,923 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-16 20:22:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 20:22:29,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:22:29,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:22:30,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:22:30,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:22:30,761 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2022-11-16 20:22:30,957 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-16 20:22:33,095 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##28: assume !false; [2022-11-16 20:22:33,095 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume false; [2022-11-16 20:22:33,130 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:22:33,507 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:22:33,507 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-16 20:22:33,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:33 BoogieIcfgContainer [2022-11-16 20:22:33,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:22:33,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:22:33,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:22:33,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:22:33,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:22:27" (1/3) ... [2022-11-16 20:22:33,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ff6e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:33, skipping insertion in model container [2022-11-16 20:22:33,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:22:29" (2/3) ... [2022-11-16 20:22:33,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51ff6e3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:33, skipping insertion in model container [2022-11-16 20:22:33,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:33" (3/3) ... [2022-11-16 20:22:33,524 INFO L112 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-net-can-usb-ems_usb.ko.cil.out.i [2022-11-16 20:22:33,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:22:33,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:22:33,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:22:33,634 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;@36e22ecf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:22:33,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:22:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 327 states, 200 states have (on average 1.38) internal successors, (276), 212 states have internal predecessors, (276), 91 states have call successors, (91), 35 states have call predecessors, (91), 34 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2022-11-16 20:22:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 20:22:33,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:33,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:33,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1750355893, now seen corresponding path program 1 times [2022-11-16 20:22:33,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:33,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952308548] [2022-11-16 20:22:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:33,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:34,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:34,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952308548] [2022-11-16 20:22:34,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952308548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:34,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:34,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462987457] [2022-11-16 20:22:34,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:34,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:34,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:34,294 INFO L87 Difference]: Start difference. First operand has 327 states, 200 states have (on average 1.38) internal successors, (276), 212 states have internal predecessors, (276), 91 states have call successors, (91), 35 states have call predecessors, (91), 34 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:38,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:22:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:38,123 INFO L93 Difference]: Finished difference Result 836 states and 1187 transitions. [2022-11-16 20:22:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:38,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-16 20:22:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:38,143 INFO L225 Difference]: With dead ends: 836 [2022-11-16 20:22:38,143 INFO L226 Difference]: Without dead ends: 508 [2022-11-16 20:22:38,149 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 [2022-11-16 20:22:38,152 INFO L413 NwaCegarLoop]: 439 mSDtfsCounter, 252 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:38,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 810 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 20:22:38,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-16 20:22:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 504. [2022-11-16 20:22:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 311 states have (on average 1.3183279742765273) internal successors, (410), 322 states have internal predecessors, (410), 136 states have call successors, (136), 58 states have call predecessors, (136), 56 states have return successors, (132), 126 states have call predecessors, (132), 132 states have call successors, (132) [2022-11-16 20:22:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 678 transitions. [2022-11-16 20:22:38,311 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 678 transitions. Word has length 10 [2022-11-16 20:22:38,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:38,312 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 678 transitions. [2022-11-16 20:22:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:38,312 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 678 transitions. [2022-11-16 20:22:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 20:22:38,313 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:38,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:38,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:22:38,314 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:38,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1573313863, now seen corresponding path program 1 times [2022-11-16 20:22:38,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:38,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056561891] [2022-11-16 20:22:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:38,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:38,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:38,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056561891] [2022-11-16 20:22:38,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056561891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:38,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:38,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:38,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766372790] [2022-11-16 20:22:38,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:38,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:38,591 INFO L87 Difference]: Start difference. First operand 504 states and 678 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:42,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:22:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:42,910 INFO L93 Difference]: Finished difference Result 742 states and 994 transitions. [2022-11-16 20:22:42,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:42,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-16 20:22:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:42,918 INFO L225 Difference]: With dead ends: 742 [2022-11-16 20:22:42,918 INFO L226 Difference]: Without dead ends: 733 [2022-11-16 20:22:42,919 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 [2022-11-16 20:22:42,920 INFO L413 NwaCegarLoop]: 451 mSDtfsCounter, 311 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:42,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 819 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-16 20:22:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-11-16 20:22:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 728. [2022-11-16 20:22:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 451 states have (on average 1.3082039911308203) internal successors, (590), 463 states have internal predecessors, (590), 195 states have call successors, (195), 84 states have call predecessors, (195), 81 states have return successors, (191), 182 states have call predecessors, (191), 191 states have call successors, (191) [2022-11-16 20:22:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 976 transitions. [2022-11-16 20:22:43,009 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 976 transitions. Word has length 11 [2022-11-16 20:22:43,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:43,009 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 976 transitions. [2022-11-16 20:22:43,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:43,010 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 976 transitions. [2022-11-16 20:22:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 20:22:43,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:43,013 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:22:43,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:22:43,014 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1402781733, now seen corresponding path program 1 times [2022-11-16 20:22:43,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:43,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010195508] [2022-11-16 20:22:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:43,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:22:43,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:43,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010195508] [2022-11-16 20:22:43,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010195508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:43,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:43,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:43,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340114760] [2022-11-16 20:22:43,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:43,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:43,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:43,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:43,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:43,211 INFO L87 Difference]: Start difference. First operand 728 states and 976 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:22:46,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:22:46,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:46,921 INFO L93 Difference]: Finished difference Result 1772 states and 2471 transitions. [2022-11-16 20:22:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-11-16 20:22:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:46,928 INFO L225 Difference]: With dead ends: 1772 [2022-11-16 20:22:46,928 INFO L226 Difference]: Without dead ends: 1049 [2022-11-16 20:22:46,932 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 [2022-11-16 20:22:46,933 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 164 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:46,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 757 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-16 20:22:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-11-16 20:22:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1040. [2022-11-16 20:22:47,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 661 states have (on average 1.3449319213313162) internal successors, (889), 681 states have internal predecessors, (889), 297 states have call successors, (297), 84 states have call predecessors, (297), 81 states have return successors, (293), 278 states have call predecessors, (293), 293 states have call successors, (293) [2022-11-16 20:22:47,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1479 transitions. [2022-11-16 20:22:47,040 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1479 transitions. Word has length 52 [2022-11-16 20:22:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:47,040 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1479 transitions. [2022-11-16 20:22:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 20:22:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1479 transitions. [2022-11-16 20:22:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 20:22:47,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:47,055 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:22:47,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:22:47,056 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:47,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1235726526, now seen corresponding path program 1 times [2022-11-16 20:22:47,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:47,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260195226] [2022-11-16 20:22:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:47,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:22:48,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:48,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260195226] [2022-11-16 20:22:48,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260195226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:48,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:48,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 20:22:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085714633] [2022-11-16 20:22:48,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:48,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 20:22:48,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:48,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 20:22:48,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:22:48,644 INFO L87 Difference]: Start difference. First operand 1040 states and 1479 transitions. Second operand has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:22:50,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:22:51,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:22:53,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:22:55,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:05,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:07,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:09,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:10,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:13,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:16,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:19,259 INFO L93 Difference]: Finished difference Result 2364 states and 3436 transitions. [2022-11-16 20:23:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 20:23:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2022-11-16 20:23:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:19,271 INFO L225 Difference]: With dead ends: 2364 [2022-11-16 20:23:19,271 INFO L226 Difference]: Without dead ends: 1580 [2022-11-16 20:23:19,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-16 20:23:19,283 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 493 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 2399 mSolverCounterSat, 99 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2399 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:19,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 3136 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2399 Invalid, 2 Unknown, 0 Unchecked, 30.2s Time] [2022-11-16 20:23:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-11-16 20:23:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1050. [2022-11-16 20:23:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 668 states have (on average 1.344311377245509) internal successors, (898), 686 states have internal predecessors, (898), 299 states have call successors, (299), 85 states have call predecessors, (299), 82 states have return successors, (295), 282 states have call predecessors, (295), 295 states have call successors, (295) [2022-11-16 20:23:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1492 transitions. [2022-11-16 20:23:19,393 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1492 transitions. Word has length 47 [2022-11-16 20:23:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:19,394 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1492 transitions. [2022-11-16 20:23:19,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:23:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1492 transitions. [2022-11-16 20:23:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 20:23:19,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:19,398 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:23:19,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:23:19,399 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:19,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1390502159, now seen corresponding path program 1 times [2022-11-16 20:23:19,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:19,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596527067] [2022-11-16 20:23:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 20:23:20,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:20,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596527067] [2022-11-16 20:23:20,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596527067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:20,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:20,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 20:23:20,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113770888] [2022-11-16 20:23:20,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:20,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 20:23:20,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:20,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 20:23:20,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 20:23:20,257 INFO L87 Difference]: Start difference. First operand 1050 states and 1492 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:23:22,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:25,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:33,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:39,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:41,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:43,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:47,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:49,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 20:23:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:49,427 INFO L93 Difference]: Finished difference Result 2328 states and 3431 transitions. [2022-11-16 20:23:49,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 20:23:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-11-16 20:23:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:49,440 INFO L225 Difference]: With dead ends: 2328 [2022-11-16 20:23:49,440 INFO L226 Difference]: Without dead ends: 2323 [2022-11-16 20:23:49,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:49,442 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 1143 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2325 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:49,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 2325 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 28.9s Time] [2022-11-16 20:23:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-11-16 20:23:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1769. [2022-11-16 20:23:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1123 states have (on average 1.3437221727515583) internal successors, (1509), 1155 states have internal predecessors, (1509), 507 states have call successors, (507), 142 states have call predecessors, (507), 138 states have return successors, (523), 479 states have call predecessors, (523), 503 states have call successors, (523) [2022-11-16 20:23:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2539 transitions. [2022-11-16 20:23:49,619 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2539 transitions. Word has length 53 [2022-11-16 20:23:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:49,619 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 2539 transitions. [2022-11-16 20:23:49,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:23:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2539 transitions. [2022-11-16 20:23:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 20:23:49,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:49,622 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:23:49,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:23:49,623 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:49,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1172846488, now seen corresponding path program 1 times [2022-11-16 20:23:49,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:49,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341180082] [2022-11-16 20:23:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:49,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:23:49,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341180082] [2022-11-16 20:23:49,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341180082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:49,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:23:49,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:23:49,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802408167] [2022-11-16 20:23:49,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:49,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:49,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:23:49,861 INFO L87 Difference]: Start difference. First operand 1769 states and 2539 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 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) [2022-11-16 20:23:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:53,168 INFO L93 Difference]: Finished difference Result 3025 states and 4359 transitions. [2022-11-16 20:23:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:53,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 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 65 [2022-11-16 20:23:53,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:53,178 INFO L225 Difference]: With dead ends: 3025 [2022-11-16 20:23:53,179 INFO L226 Difference]: Without dead ends: 1779 [2022-11-16 20:23:53,182 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 [2022-11-16 20:23:53,183 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 0 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:53,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 745 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 20:23:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2022-11-16 20:23:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1779. [2022-11-16 20:23:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1133 states have (on average 1.3406884377758164) internal successors, (1519), 1165 states have internal predecessors, (1519), 507 states have call successors, (507), 142 states have call predecessors, (507), 138 states have return successors, (523), 479 states have call predecessors, (523), 503 states have call successors, (523) [2022-11-16 20:23:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2549 transitions. [2022-11-16 20:23:53,306 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2549 transitions. Word has length 65 [2022-11-16 20:23:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:53,306 INFO L495 AbstractCegarLoop]: Abstraction has 1779 states and 2549 transitions. [2022-11-16 20:23:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 2 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) [2022-11-16 20:23:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2549 transitions. [2022-11-16 20:23:53,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 20:23:53,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:53,309 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:23:53,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:23:53,310 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:53,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:53,310 INFO L85 PathProgramCache]: Analyzing trace with hash -178206725, now seen corresponding path program 1 times [2022-11-16 20:23:53,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:53,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825241164] [2022-11-16 20:23:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:53,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:23:53,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:53,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825241164] [2022-11-16 20:23:53,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825241164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:53,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33592150] [2022-11-16 20:23:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:53,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:53,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:53,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:53,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dede4fab-c612-46fd-aab7-80a34d57abcf/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:23:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:54,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1549 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 20:23:54,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 20:23:54,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:23:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:23:54,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33592150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:23:54,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512480570] [2022-11-16 20:23:54,346 INFO L159 IcfgInterpreter]: Started Sifa with 62 locations of interest [2022-11-16 20:23:54,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:23:54,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:23:54,356 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:23:54,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:23:55,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 196 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 76 [2022-11-16 20:23:56,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2866 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 351 [2022-11-16 20:23:56,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1308 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 231 [2022-11-16 20:24:15,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 20:24:15,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-16 20:25:25,781 INFO L217 Elim1Store]: Index analysis took 108 ms [2022-11-16 20:25:26,982 INFO L321 Elim1Store]: treesize reduction 97, result has 21.1 percent of original size [2022-11-16 20:25:26,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 48 [2022-11-16 20:25:27,396 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-16 20:25:27,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 64 [2022-11-16 20:25:27,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:27,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:25:27,569 INFO L321 Elim1Store]: treesize reduction 169, result has 21.4 percent of original size [2022-11-16 20:25:27,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 16 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 111 [2022-11-16 20:25:28,000 INFO L321 Elim1Store]: treesize reduction 344, result has 39.5 percent of original size [2022-11-16 20:25:28,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 116 treesize of output 289 [2022-11-16 20:25:28,883 INFO L321 Elim1Store]: treesize reduction 208, result has 42.4 percent of original size [2022-11-16 20:25:28,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 29 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 8 case distinctions, treesize of input 109 treesize of output 153 [2022-11-16 20:25:29,325 INFO L321 Elim1Store]: treesize reduction 232, result has 53.3 percent of original size [2022-11-16 20:25:29,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 16 case distinctions, treesize of input 187 treesize of output 387 [2022-11-16 20:25:29,849 INFO L217 Elim1Store]: Index analysis took 101 ms [2022-11-16 20:25:31,274 INFO L321 Elim1Store]: treesize reduction 88, result has 28.5 percent of original size [2022-11-16 20:25:31,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 57 [2022-11-16 20:25:31,762 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-16 20:25:31,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 73 [2022-11-16 20:25:31,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:31,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:25:32,143 INFO L321 Elim1Store]: treesize reduction 169, result has 21.4 percent of original size [2022-11-16 20:25:32,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 111 [2022-11-16 20:25:32,680 INFO L321 Elim1Store]: treesize reduction 348, result has 38.8 percent of original size [2022-11-16 20:25:32,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 116 treesize of output 285 [2022-11-16 20:25:33,341 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-16 20:25:33,396 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14