./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta --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 70a2ace6fc40caa55e586c636402c0a5dfab1c8b77b7cf0fdf6a2120173a773c --- 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-dbf71c6-m [2022-10-17 17:41:01,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:01,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:01,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:01,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:01,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:01,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:01,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:01,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:01,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:01,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:01,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:01,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:01,692 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:01,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:01,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:01,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:01,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:01,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:01,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:01,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:01,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:01,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:01,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:01,732 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:01,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:01,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:01,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:01,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:01,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:01,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:01,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:01,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:01,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:01,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:01,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:01,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:01,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:01,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:01,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:01,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:01,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:41:01,812 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:01,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:01,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:01,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:01,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:01,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:01,816 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:01,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:01,816 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:01,817 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:01,818 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:01,818 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:01,819 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:01,819 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:01,819 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:01,820 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:01,820 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:01,820 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:01,821 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:01,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:01,822 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:01,822 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:01,822 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:01,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:01,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:01,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:01,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:01,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:01,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:01,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:01,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:01,828 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:01,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:01,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:01,829 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:01,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:01,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:01,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:01,830 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_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 70a2ace6fc40caa55e586c636402c0a5dfab1c8b77b7cf0fdf6a2120173a773c [2022-10-17 17:41:02,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:02,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:02,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:02,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:02,238 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:02,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i [2022-10-17 17:41:02,313 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/data/5e68251f5/741aee1cb9034ffa9a4314847273ed22/FLAG5e9df72f8 [2022-10-17 17:41:03,439 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:03,440 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i [2022-10-17 17:41:03,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/data/5e68251f5/741aee1cb9034ffa9a4314847273ed22/FLAG5e9df72f8 [2022-10-17 17:41:03,796 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/data/5e68251f5/741aee1cb9034ffa9a4314847273ed22 [2022-10-17 17:41:03,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:03,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:03,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:03,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:03,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:03,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:03" (1/1) ... [2022-10-17 17:41:03,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6a9f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:03, skipping insertion in model container [2022-10-17 17:41:03,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:03" (1/1) ... [2022-10-17 17:41:03,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:03,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:05,639 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i[199632,199645] [2022-10-17 17:41:05,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:05,774 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:06,130 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-net-usb-catc.ko.cil.out.i[199632,199645] [2022-10-17 17:41:06,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:06,522 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:06,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06 WrapperNode [2022-10-17 17:41:06,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:06,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:06,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:06,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:06,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:06,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:06,774 INFO L138 Inliner]: procedures = 142, calls = 839, calls flagged for inlining = 59, calls inlined = 40, statements flattened = 1679 [2022-10-17 17:41:06,774 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:06,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:06,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:06,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:06,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:06,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:06,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:06,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:06,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:06,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:07,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:07,018 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:07,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:07,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:07,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:07,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:07,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (1/1) ... [2022-10-17 17:41:07,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:07,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:07,096 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:07,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d2a352f-1ac0-45c6-bc36-d85a5663aa30/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:07,165 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-10-17 17:41:07,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-10-17 17:41:07,166 INFO L130 BoogieDeclarations]: Found specification of procedure catc_tx_run [2022-10-17 17:41:07,166 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_tx_run [2022-10-17 17:41:07,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:41:07,166 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-10-17 17:41:07,166 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-10-17 17:41:07,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:41:07,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:41:07,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:41:07,167 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-10-17 17:41:07,167 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-10-17 17:41:07,168 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-10-17 17:41:07,168 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-10-17 17:41:07,168 INFO L130 BoogieDeclarations]: Found specification of procedure catc_ctrl_run [2022-10-17 17:41:07,168 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_ctrl_run [2022-10-17 17:41:07,168 INFO L130 BoogieDeclarations]: Found specification of procedure catc_get_drvinfo [2022-10-17 17:41:07,169 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_get_drvinfo [2022-10-17 17:41:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure catc_ctrl_msg [2022-10-17 17:41:07,169 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_ctrl_msg [2022-10-17 17:41:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-17 17:41:07,169 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-17 17:41:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-17 17:41:07,170 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-17 17:41:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:41:07,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:41:07,170 INFO L130 BoogieDeclarations]: Found specification of procedure catc_multicast [2022-10-17 17:41:07,171 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_multicast [2022-10-17 17:41:07,171 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-10-17 17:41:07,171 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-10-17 17:41:07,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:41:07,171 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-10-17 17:41:07,172 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-10-17 17:41:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2022-10-17 17:41:07,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2022-10-17 17:41:07,172 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-10-17 17:41:07,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-10-17 17:41:07,173 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-10-17 17:41:07,173 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-10-17 17:41:07,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:41:07,173 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:41:07,173 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-10-17 17:41:07,174 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-10-17 17:41:07,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:41:07,174 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2022-10-17 17:41:07,174 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2022-10-17 17:41:07,175 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-10-17 17:41:07,175 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-10-17 17:41:07,176 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-10-17 17:41:07,177 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-10-17 17:41:07,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:07,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:41:07,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:41:07,178 INFO L130 BoogieDeclarations]: Found specification of procedure catc_ctrl_async [2022-10-17 17:41:07,179 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_ctrl_async [2022-10-17 17:41:07,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:41:07,179 INFO L130 BoogieDeclarations]: Found specification of procedure catc_exit [2022-10-17 17:41:07,179 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_exit [2022-10-17 17:41:07,180 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-10-17 17:41:07,181 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-10-17 17:41:07,181 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-10-17 17:41:07,181 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-10-17 17:41:07,181 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-10-17 17:41:07,181 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-10-17 17:41:07,182 INFO L130 BoogieDeclarations]: Found specification of procedure catc_init [2022-10-17 17:41:07,182 INFO L138 BoogieDeclarations]: Found implementation of procedure catc_init [2022-10-17 17:41:07,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2022-10-17 17:41:07,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2022-10-17 17:41:07,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:41:07,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:41:07,183 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-10-17 17:41:07,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-10-17 17:41:07,183 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-10-17 17:41:07,183 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-10-17 17:41:07,183 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-10-17 17:41:07,184 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-10-17 17:41:07,185 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-10-17 17:41:07,185 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-10-17 17:41:07,185 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-10-17 17:41:07,185 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-10-17 17:41:07,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2022-10-17 17:41:07,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2022-10-17 17:41:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-10-17 17:41:07,187 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-10-17 17:41:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:41:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2022-10-17 17:41:07,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:07,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:07,755 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:07,758 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:08,841 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2022-10-17 17:41:08,972 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:41:08,988 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:41:10,636 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##191: assume false; [2022-10-17 17:41:10,638 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##192: assume !false; [2022-10-17 17:41:10,638 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-10-17 17:41:10,639 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-10-17 17:41:10,694 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:11,247 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:11,248 INFO L300 CfgBuilder]: Removed 30 assume(true) statements. [2022-10-17 17:41:11,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:11 BoogieIcfgContainer [2022-10-17 17:41:11,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:11,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:11,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:11,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:11,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:03" (1/3) ... [2022-10-17 17:41:11,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ddc0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:11, skipping insertion in model container [2022-10-17 17:41:11,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:06" (2/3) ... [2022-10-17 17:41:11,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ddc0f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:11, skipping insertion in model container [2022-10-17 17:41:11,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:11" (3/3) ... [2022-10-17 17:41:11,265 INFO L112 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-net-usb-catc.ko.cil.out.i [2022-10-17 17:41:11,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:11,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:41:11,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:11,368 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;@767670b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:11,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:41:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 245 states have (on average 1.3142857142857143) internal successors, (322), 258 states have internal predecessors, (322), 122 states have call successors, (122), 36 states have call predecessors, (122), 35 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) [2022-10-17 17:41:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:41:11,383 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:11,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:11,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:11,390 INFO L85 PathProgramCache]: Analyzing trace with hash -290118180, now seen corresponding path program 1 times [2022-10-17 17:41:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:11,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676291344] [2022-10-17 17:41:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:11,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:12,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676291344] [2022-10-17 17:41:12,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676291344] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:12,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:12,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:41:12,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828787777] [2022-10-17 17:41:12,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:12,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:41:12,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:41:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:12,125 INFO L87 Difference]: Start difference. First operand has 404 states, 245 states have (on average 1.3142857142857143) internal successors, (322), 258 states have internal predecessors, (322), 122 states have call successors, (122), 36 states have call predecessors, (122), 35 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) 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) [2022-10-17 17:41:13,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:16,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:17,205 INFO L93 Difference]: Finished difference Result 1079 states and 1538 transitions. [2022-10-17 17:41:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:41:17,208 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 [2022-10-17 17:41:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:17,228 INFO L225 Difference]: With dead ends: 1079 [2022-10-17 17:41:17,228 INFO L226 Difference]: Without dead ends: 675 [2022-10-17 17:41:17,238 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 [2022-10-17 17:41:17,242 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 371 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:17,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 991 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-10-17 17:41:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-10-17 17:41:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 671. [2022-10-17 17:41:17,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 412 states have (on average 1.2548543689320388) internal successors, (517), 426 states have internal predecessors, (517), 194 states have call successors, (194), 66 states have call predecessors, (194), 64 states have return successors, (191), 187 states have call predecessors, (191), 191 states have call successors, (191) [2022-10-17 17:41:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 902 transitions. [2022-10-17 17:41:17,440 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 902 transitions. Word has length 10 [2022-10-17 17:41:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:17,441 INFO L495 AbstractCegarLoop]: Abstraction has 671 states and 902 transitions. [2022-10-17 17:41:17,441 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) [2022-10-17 17:41:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 902 transitions. [2022-10-17 17:41:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:41:17,442 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:17,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:41:17,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash -403988442, now seen corresponding path program 1 times [2022-10-17 17:41:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:17,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761805823] [2022-10-17 17:41:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:17,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:17,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761805823] [2022-10-17 17:41:17,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761805823] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:17,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:17,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:41:17,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133724911] [2022-10-17 17:41:17,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:17,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:41:17,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:17,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:41:17,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:17,711 INFO L87 Difference]: Start difference. First operand 671 states and 902 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) [2022-10-17 17:41:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:20,404 INFO L93 Difference]: Finished difference Result 673 states and 903 transitions. [2022-10-17 17:41:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:41:20,405 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 [2022-10-17 17:41:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:20,416 INFO L225 Difference]: With dead ends: 673 [2022-10-17 17:41:20,417 INFO L226 Difference]: Without dead ends: 664 [2022-10-17 17:41:20,418 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 [2022-10-17 17:41:20,420 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 533 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:20,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 460 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-10-17 17:41:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-10-17 17:41:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2022-10-17 17:41:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 408 states have (on average 1.2426470588235294) internal successors, (507), 420 states have internal predecessors, (507), 192 states have call successors, (192), 65 states have call predecessors, (192), 63 states have return successors, (190), 186 states have call predecessors, (190), 190 states have call successors, (190) [2022-10-17 17:41:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 889 transitions. [2022-10-17 17:41:20,538 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 889 transitions. Word has length 11 [2022-10-17 17:41:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:20,539 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 889 transitions. [2022-10-17 17:41:20,540 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) [2022-10-17 17:41:20,540 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 889 transitions. [2022-10-17 17:41:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 17:41:20,545 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:20,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:20,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:41:20,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:20,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1994694066, now seen corresponding path program 1 times [2022-10-17 17:41:20,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:20,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738960118] [2022-10-17 17:41:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:20,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:20,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:20,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738960118] [2022-10-17 17:41:20,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738960118] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:20,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:20,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:41:20,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746680602] [2022-10-17 17:41:20,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:20,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:41:20,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:41:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:20,956 INFO L87 Difference]: Start difference. First operand 664 states and 889 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:41:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:24,429 INFO L93 Difference]: Finished difference Result 1574 states and 2170 transitions. [2022-10-17 17:41:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:41:24,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-10-17 17:41:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:24,447 INFO L225 Difference]: With dead ends: 1574 [2022-10-17 17:41:24,448 INFO L226 Difference]: Without dead ends: 915 [2022-10-17 17:41:24,457 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 [2022-10-17 17:41:24,461 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 185 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:24,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 887 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-10-17 17:41:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-10-17 17:41:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 911. [2022-10-17 17:41:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 573 states have (on average 1.2722513089005236) internal successors, (729), 593 states have internal predecessors, (729), 274 states have call successors, (274), 65 states have call predecessors, (274), 63 states have return successors, (272), 266 states have call predecessors, (272), 272 states have call successors, (272) [2022-10-17 17:41:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1275 transitions. [2022-10-17 17:41:24,604 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1275 transitions. Word has length 35 [2022-10-17 17:41:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:24,611 INFO L495 AbstractCegarLoop]: Abstraction has 911 states and 1275 transitions. [2022-10-17 17:41:24,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:41:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1275 transitions. [2022-10-17 17:41:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 17:41:24,627 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:24,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:24,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:41:24,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:24,629 INFO L85 PathProgramCache]: Analyzing trace with hash 888133124, now seen corresponding path program 1 times [2022-10-17 17:41:24,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:24,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469421520] [2022-10-17 17:41:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:24,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:24,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:24,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469421520] [2022-10-17 17:41:24,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469421520] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:24,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:24,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:41:24,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270781472] [2022-10-17 17:41:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:24,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:41:24,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:24,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:41:24,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:41:24,974 INFO L87 Difference]: Start difference. First operand 911 states and 1275 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 17:41:26,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:31,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:31,505 INFO L93 Difference]: Finished difference Result 1681 states and 2331 transitions. [2022-10-17 17:41:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:41:31,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2022-10-17 17:41:31,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:31,514 INFO L225 Difference]: With dead ends: 1681 [2022-10-17 17:41:31,514 INFO L226 Difference]: Without dead ends: 771 [2022-10-17 17:41:31,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:41:31,519 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 11 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:31,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1365 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-10-17 17:41:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-10-17 17:41:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 763. [2022-10-17 17:41:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 475 states have (on average 1.256842105263158) internal successors, (597), 491 states have internal predecessors, (597), 226 states have call successors, (226), 63 states have call predecessors, (226), 61 states have return successors, (224), 219 states have call predecessors, (224), 224 states have call successors, (224) [2022-10-17 17:41:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1047 transitions. [2022-10-17 17:41:31,573 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1047 transitions. Word has length 53 [2022-10-17 17:41:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:31,574 INFO L495 AbstractCegarLoop]: Abstraction has 763 states and 1047 transitions. [2022-10-17 17:41:31,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 17:41:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1047 transitions. [2022-10-17 17:41:31,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 17:41:31,577 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:31,577 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:31,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:41:31,578 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:31,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash 916828876, now seen corresponding path program 1 times [2022-10-17 17:41:31,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:31,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450512046] [2022-10-17 17:41:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:31,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-10-17 17:41:32,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:32,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450512046] [2022-10-17 17:41:32,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450512046] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:32,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:32,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:41:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710442336] [2022-10-17 17:41:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:41:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:41:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:41:32,510 INFO L87 Difference]: Start difference. First operand 763 states and 1047 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2022-10-17 17:41:34,306 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 []