./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW --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 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd --- 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-4e7fbc6 [2022-11-23 14:44:52,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:44:52,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:44:52,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:44:52,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:44:53,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:44:53,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:44:53,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:44:53,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:44:53,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:44:53,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:44:53,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:44:53,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:44:53,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:44:53,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:44:53,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:44:53,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:44:53,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:44:53,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:44:53,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:44:53,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:44:53,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:44:53,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:44:53,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:44:53,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:44:53,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:44:53,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:44:53,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:44:53,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:44:53,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:44:53,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:44:53,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:44:53,034 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:44:53,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:44:53,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:44:53,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:44:53,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:44:53,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:44:53,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:44:53,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:44:53,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:44:53,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:44:53,067 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:44:53,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:44:53,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:44:53,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:44:53,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:44:53,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:44:53,070 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:44:53,070 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:44:53,070 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:44:53,071 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:44:53,071 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:44:53,071 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:44:53,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:44:53,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:44:53,072 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:44:53,072 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:44:53,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:44:53,073 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:44:53,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:44:53,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:44:53,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:44:53,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:44:53,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:44:53,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:44:53,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:44:53,076 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:44:53,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:44:53,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:44:53,076 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:44:53,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:44:53,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:44:53,077 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:44:53,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:44:53,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:44:53,078 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:44:53,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:44:53,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:44:53,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:44:53,079 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_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6932181a2a9c8d4d7c700844e1db6a95829edf2ea099e17754a10b04a114b5cd [2022-11-23 14:44:53,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:44:53,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:44:53,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:44:53,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:44:53,349 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:44:53,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2022-11-23 14:44:56,612 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:44:57,238 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:44:57,238 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2022-11-23 14:44:57,277 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/data/953683fd8/d137afcd88004fd08c1dbe00f36e6b4d/FLAGcc724b7d3 [2022-11-23 14:44:57,292 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/data/953683fd8/d137afcd88004fd08c1dbe00f36e6b4d [2022-11-23 14:44:57,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:44:57,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:44:57,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:44:57,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:44:57,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:44:57,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:57" (1/1) ... [2022-11-23 14:44:57,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e10288d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:57, skipping insertion in model container [2022-11-23 14:44:57,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:44:57" (1/1) ... [2022-11-23 14:44:57,314 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:44:57,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:44:59,254 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2022-11-23 14:44:59,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:44:59,378 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:44:59,815 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i[213066,213079] [2022-11-23 14:44:59,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:44:59,916 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:44:59,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59 WrapperNode [2022-11-23 14:44:59,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:44:59,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:44:59,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:44:59,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:44:59,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,237 INFO L138 Inliner]: procedures = 222, calls = 2703, calls flagged for inlining = 88, calls inlined = 85, statements flattened = 5072 [2022-11-23 14:45:00,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:45:00,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:45:00,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:45:00,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:45:00,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,324 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:45:00,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:45:00,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:45:00,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:45:00,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (1/1) ... [2022-11-23 14:45:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:45:00,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:00,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:45:00,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:45:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure gr_free_dma_desc_chain [2022-11-23 14:45:00,662 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_free_dma_desc_chain [2022-11-23 14:45:00,662 INFO L130 BoogieDeclarations]: Found specification of procedure gr_finish_request [2022-11-23 14:45:00,663 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_finish_request [2022-11-23 14:45:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:45:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure gr_queue [2022-11-23 14:45:00,663 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_queue [2022-11-23 14:45:00,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:45:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 14:45:00,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 14:45:00,664 INFO L130 BoogieDeclarations]: Found specification of procedure seq_puts [2022-11-23 14:45:00,665 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_puts [2022-11-23 14:45:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 14:45:00,665 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 14:45:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_halt_wedge [2022-11-23 14:45:00,665 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_halt_wedge [2022-11-23 14:45:00,665 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-23 14:45:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-23 14:45:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:45:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:45:00,666 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-23 14:45:00,666 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-23 14:45:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure usb_speed_string [2022-11-23 14:45:00,667 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_speed_string [2022-11-23 14:45:00,667 INFO L130 BoogieDeclarations]: Found specification of procedure gr_control_stall [2022-11-23 14:45:00,668 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_control_stall [2022-11-23 14:45:00,668 INFO L130 BoogieDeclarations]: Found specification of procedure gr_stop_activity [2022-11-23 14:45:00,669 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_stop_activity [2022-11-23 14:45:00,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 14:45:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 14:45:00,670 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_enable [2022-11-23 14:45:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_enable [2022-11-23 14:45:00,670 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_halt_wedge [2022-11-23 14:45:00,670 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_halt_wedge [2022-11-23 14:45:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 14:45:00,671 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 14:45:00,671 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2022-11-23 14:45:00,671 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2022-11-23 14:45:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:45:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:45:00,672 INFO L130 BoogieDeclarations]: Found specification of procedure gr_queue_int [2022-11-23 14:45:00,672 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_queue_int [2022-11-23 14:45:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:45:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 14:45:00,673 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 14:45:00,673 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dequeue [2022-11-23 14:45:00,673 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dequeue [2022-11-23 14:45:00,674 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_remove [2022-11-23 14:45:00,674 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_remove [2022-11-23 14:45:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32be [2022-11-23 14:45:00,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32be [2022-11-23 14:45:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_irq [2022-11-23 14:45:00,675 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_irq [2022-11-23 14:45:00,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:45:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-23 14:45:00,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-23 14:45:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 14:45:00,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 14:45:00,676 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_setup [2022-11-23 14:45:00,676 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_setup [2022-11-23 14:45:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 14:45:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 14:45:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:45:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:45:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure gr_alloc_request [2022-11-23 14:45:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_alloc_request [2022-11-23 14:45:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure gr_wakeup [2022-11-23 14:45:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_wakeup [2022-11-23 14:45:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_remove [2022-11-23 14:45:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_remove [2022-11-23 14:45:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_reset [2022-11-23 14:45:00,678 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_reset [2022-11-23 14:45:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure gr_udc_stop [2022-11-23 14:45:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_udc_stop [2022-11-23 14:45:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_nuke [2022-11-23 14:45:00,679 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_nuke [2022-11-23 14:45:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure gr_fifo_flush [2022-11-23 14:45:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_fifo_flush [2022-11-23 14:45:00,680 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_disable [2022-11-23 14:45:00,680 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_disable [2022-11-23 14:45:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 14:45:00,681 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 14:45:00,681 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0out_requeue [2022-11-23 14:45:00,682 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0out_requeue [2022-11-23 14:45:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure gr_vbus_connected [2022-11-23 14:45:00,682 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_vbus_connected [2022-11-23 14:45:00,682 INFO L130 BoogieDeclarations]: Found specification of procedure gr_enable_vbus_detect [2022-11-23 14:45:00,682 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_enable_vbus_detect [2022-11-23 14:45:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 14:45:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-11-23 14:45:00,683 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-11-23 14:45:00,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 14:45:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure gr_irq_handler [2022-11-23 14:45:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_irq_handler [2022-11-23 14:45:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_wedge [2022-11-23 14:45:00,685 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_wedge [2022-11-23 14:45:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure devm_request_threaded_irq [2022-11-23 14:45:00,685 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_request_threaded_irq [2022-11-23 14:45:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dfs_open [2022-11-23 14:45:00,686 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dfs_open [2022-11-23 14:45:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32be [2022-11-23 14:45:00,686 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32be [2022-11-23 14:45:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_respond_empty [2022-11-23 14:45:00,687 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_respond_empty [2022-11-23 14:45:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:45:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure gr_irq [2022-11-23 14:45:00,687 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_irq [2022-11-23 14:45:00,687 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep_init [2022-11-23 14:45:00,687 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep_init [2022-11-23 14:45:00,688 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2022-11-23 14:45:00,689 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2022-11-23 14:45:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-23 14:45:00,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-23 14:45:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2022-11-23 14:45:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2022-11-23 14:45:00,694 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_respond [2022-11-23 14:45:00,694 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_respond [2022-11-23 14:45:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:45:00,695 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2022-11-23 14:45:00,695 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2022-11-23 14:45:00,701 INFO L130 BoogieDeclarations]: Found specification of procedure gr_disable_interrupts_and_pullup [2022-11-23 14:45:00,701 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_disable_interrupts_and_pullup [2022-11-23 14:45:00,702 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:45:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:45:00,702 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 14:45:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 14:45:00,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:45:00,703 INFO L130 BoogieDeclarations]: Found specification of procedure gr_request_irq [2022-11-23 14:45:00,703 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_request_irq [2022-11-23 14:45:00,703 INFO L130 BoogieDeclarations]: Found specification of procedure gr_add_dma_desc [2022-11-23 14:45:00,704 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_add_dma_desc [2022-11-23 14:45:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 14:45:00,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 14:45:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:45:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_set_state [2022-11-23 14:45:00,704 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_set_state [2022-11-23 14:45:00,704 INFO L130 BoogieDeclarations]: Found specification of procedure gr_abort_dma [2022-11-23 14:45:00,705 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_abort_dma [2022-11-23 14:45:00,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:45:00,705 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0state_string [2022-11-23 14:45:00,705 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0state_string [2022-11-23 14:45:00,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2022-11-23 14:45:00,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2022-11-23 14:45:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure gr_fifo_status [2022-11-23 14:45:00,706 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_fifo_status [2022-11-23 14:45:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:45:00,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:45:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2022-11-23 14:45:00,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2022-11-23 14:45:00,706 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_address [2022-11-23 14:45:00,707 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_address [2022-11-23 14:45:00,707 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dbgprint_request [2022-11-23 14:45:00,707 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dbgprint_request [2022-11-23 14:45:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure gr_free_request [2022-11-23 14:45:00,708 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_free_request [2022-11-23 14:45:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure gr_udc_start [2022-11-23 14:45:00,708 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_udc_start [2022-11-23 14:45:00,708 INFO L130 BoogieDeclarations]: Found specification of procedure gr_set_ep0state [2022-11-23 14:45:00,709 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_set_ep0state [2022-11-23 14:45:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure platform_set_drvdata [2022-11-23 14:45:00,709 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_set_drvdata [2022-11-23 14:45:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure gr_dma_advance [2022-11-23 14:45:00,709 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_dma_advance [2022-11-23 14:45:00,709 INFO L130 BoogieDeclarations]: Found specification of procedure devm_kzalloc [2022-11-23 14:45:00,710 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_kzalloc [2022-11-23 14:45:00,710 INFO L130 BoogieDeclarations]: Found specification of procedure of_property_read_u32_index [2022-11-23 14:45:00,710 INFO L138 BoogieDeclarations]: Found implementation of procedure of_property_read_u32_index [2022-11-23 14:45:00,710 INFO L130 BoogieDeclarations]: Found specification of procedure gr_get_frame [2022-11-23 14:45:00,711 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_get_frame [2022-11-23 14:45:00,711 INFO L130 BoogieDeclarations]: Found specification of procedure gr_probe [2022-11-23 14:45:00,711 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_probe [2022-11-23 14:45:00,711 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_set_maxpacket_limit [2022-11-23 14:45:00,711 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_set_maxpacket_limit [2022-11-23 14:45:00,711 INFO L130 BoogieDeclarations]: Found specification of procedure gr_remove [2022-11-23 14:45:00,711 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_remove [2022-11-23 14:45:00,712 INFO L130 BoogieDeclarations]: Found specification of procedure gr_ep0_respond_u16 [2022-11-23 14:45:00,712 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_ep0_respond_u16 [2022-11-23 14:45:00,712 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 14:45:00,712 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 14:45:00,712 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 14:45:00,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-11-23 14:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure gr_start_dma [2022-11-23 14:45:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure gr_start_dma [2022-11-23 14:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:45:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:45:00,713 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 14:45:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 14:45:01,585 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:45:01,589 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:45:03,001 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 14:45:07,168 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:45:08,165 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:45:08,166 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:45:08,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:08 BoogieIcfgContainer [2022-11-23 14:45:08,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:45:08,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:45:08,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:45:08,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:45:08,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:44:57" (1/3) ... [2022-11-23 14:45:08,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca8f517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:08, skipping insertion in model container [2022-11-23 14:45:08,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:44:59" (2/3) ... [2022-11-23 14:45:08,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca8f517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:08, skipping insertion in model container [2022-11-23 14:45:08,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:08" (3/3) ... [2022-11-23 14:45:08,181 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--gadget--udc--gr_udc.ko-entry_point.cil.out.i [2022-11-23 14:45:08,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:45:08,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:45:08,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:45:08,287 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;@648a2f86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:45:08,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:45:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 1185 states, 746 states have (on average 1.376675603217158) internal successors, (1027), 790 states have internal predecessors, (1027), 352 states have call successors, (352), 86 states have call predecessors, (352), 85 states have return successors, (342), 330 states have call predecessors, (342), 342 states have call successors, (342) [2022-11-23 14:45:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-23 14:45:08,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:08,318 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:08,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2035547626, now seen corresponding path program 1 times [2022-11-23 14:45:08,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:08,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061083817] [2022-11-23 14:45:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-23 14:45:09,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:09,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061083817] [2022-11-23 14:45:09,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061083817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:09,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:09,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:45:09,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072144326] [2022-11-23 14:45:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:09,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:45:09,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:09,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:45:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:45:09,530 INFO L87 Difference]: Start difference. First operand has 1185 states, 746 states have (on average 1.376675603217158) internal successors, (1027), 790 states have internal predecessors, (1027), 352 states have call successors, (352), 86 states have call predecessors, (352), 85 states have return successors, (342), 330 states have call predecessors, (342), 342 states have call successors, (342) 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-23 14:45:10,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:12,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:14,182 INFO L93 Difference]: Finished difference Result 3397 states and 5038 transitions. [2022-11-23 14:45:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:45:14,192 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 132 [2022-11-23 14:45:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:14,224 INFO L225 Difference]: With dead ends: 3397 [2022-11-23 14:45:14,224 INFO L226 Difference]: Without dead ends: 2212 [2022-11-23 14:45:14,240 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 [2022-11-23 14:45:14,243 INFO L413 NwaCegarLoop]: 1866 mSDtfsCounter, 1549 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 3347 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:14,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1549 Valid, 3347 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 14:45:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-11-23 14:45:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2209. [2022-11-23 14:45:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 1404 states have (on average 1.358974358974359) internal successors, (1908), 1467 states have internal predecessors, (1908), 641 states have call successors, (641), 164 states have call predecessors, (641), 163 states have return successors, (640), 616 states have call predecessors, (640), 640 states have call successors, (640) [2022-11-23 14:45:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3189 transitions. [2022-11-23 14:45:14,525 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3189 transitions. Word has length 132 [2022-11-23 14:45:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:14,528 INFO L495 AbstractCegarLoop]: Abstraction has 2209 states and 3189 transitions. [2022-11-23 14:45:14,529 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-23 14:45:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3189 transitions. [2022-11-23 14:45:14,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-23 14:45:14,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:14,551 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:14,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:45:14,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1934734624, now seen corresponding path program 1 times [2022-11-23 14:45:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:14,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106028121] [2022-11-23 14:45:14,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:14,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:45:15,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:15,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106028121] [2022-11-23 14:45:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106028121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:15,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943025410] [2022-11-23 14:45:15,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:15,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:15,645 INFO L87 Difference]: Start difference. First operand 2209 states and 3189 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:17,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:22,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:22,082 INFO L93 Difference]: Finished difference Result 6593 states and 9533 transitions. [2022-11-23 14:45:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 182 [2022-11-23 14:45:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:22,217 INFO L225 Difference]: With dead ends: 6593 [2022-11-23 14:45:22,217 INFO L226 Difference]: Without dead ends: 4411 [2022-11-23 14:45:22,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:45:22,229 INFO L413 NwaCegarLoop]: 1997 mSDtfsCounter, 1674 mSDsluCounter, 5474 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 7471 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:22,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 7471 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 734 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 14:45:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2022-11-23 14:45:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 4384. [2022-11-23 14:45:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 2791 states have (on average 1.361160874238624) internal successors, (3799), 2923 states have internal predecessors, (3799), 1267 states have call successors, (1267), 326 states have call predecessors, (1267), 325 states have return successors, (1274), 1210 states have call predecessors, (1274), 1266 states have call successors, (1274) [2022-11-23 14:45:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 6340 transitions. [2022-11-23 14:45:22,461 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 6340 transitions. Word has length 182 [2022-11-23 14:45:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:22,463 INFO L495 AbstractCegarLoop]: Abstraction has 4384 states and 6340 transitions. [2022-11-23 14:45:22,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:22,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 6340 transitions. [2022-11-23 14:45:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-23 14:45:22,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:22,473 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:22,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:45:22,474 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash 129252752, now seen corresponding path program 1 times [2022-11-23 14:45:22,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:22,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566725614] [2022-11-23 14:45:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:22,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:45:23,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:23,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566725614] [2022-11-23 14:45:23,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566725614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:23,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:23,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:23,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689656148] [2022-11-23 14:45:23,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:23,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:23,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:23,330 INFO L87 Difference]: Start difference. First operand 4384 states and 6340 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:25,660 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 [] [2022-11-23 14:45:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:29,719 INFO L93 Difference]: Finished difference Result 10154 states and 14676 transitions. [2022-11-23 14:45:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 183 [2022-11-23 14:45:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:29,762 INFO L225 Difference]: With dead ends: 10154 [2022-11-23 14:45:29,763 INFO L226 Difference]: Without dead ends: 6602 [2022-11-23 14:45:29,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:45:29,780 INFO L413 NwaCegarLoop]: 1859 mSDtfsCounter, 1670 mSDsluCounter, 5196 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 7055 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:29,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1674 Valid, 7055 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 694 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2022-11-23 14:45:29,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2022-11-23 14:45:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 6565. [2022-11-23 14:45:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6565 states, 4186 states have (on average 1.3612040133779264) internal successors, (5698), 4377 states have internal predecessors, (5698), 1891 states have call successors, (1891), 488 states have call predecessors, (1891), 487 states have return successors, (1906), 1812 states have call predecessors, (1906), 1890 states have call successors, (1906) [2022-11-23 14:45:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6565 states to 6565 states and 9495 transitions. [2022-11-23 14:45:30,225 INFO L78 Accepts]: Start accepts. Automaton has 6565 states and 9495 transitions. Word has length 183 [2022-11-23 14:45:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:30,226 INFO L495 AbstractCegarLoop]: Abstraction has 6565 states and 9495 transitions. [2022-11-23 14:45:30,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6565 states and 9495 transitions. [2022-11-23 14:45:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-23 14:45:30,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:30,237 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:30,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:45:30,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:30,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:30,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1109138359, now seen corresponding path program 1 times [2022-11-23 14:45:30,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:30,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459159371] [2022-11-23 14:45:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:30,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:45:31,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:31,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459159371] [2022-11-23 14:45:31,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459159371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:31,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:31,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:31,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434390686] [2022-11-23 14:45:31,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:31,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:31,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:31,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:31,011 INFO L87 Difference]: Start difference. First operand 6565 states and 9495 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:33,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:36,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:36,503 INFO L93 Difference]: Finished difference Result 19707 states and 28511 transitions. [2022-11-23 14:45:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:36,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 185 [2022-11-23 14:45:36,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:36,605 INFO L225 Difference]: With dead ends: 19707 [2022-11-23 14:45:36,605 INFO L226 Difference]: Without dead ends: 13169 [2022-11-23 14:45:36,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:45:36,642 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 1673 mSDsluCounter, 5173 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 7022 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:36,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 7022 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 698 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-11-23 14:45:36,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13169 states. [2022-11-23 14:45:37,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13169 to 13106. [2022-11-23 14:45:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13106 states, 8357 states have (on average 1.3618523393562283) internal successors, (11381), 8763 states have internal predecessors, (11381), 3769 states have call successors, (3769), 980 states have call predecessors, (3769), 979 states have return successors, (3800), 3588 states have call predecessors, (3800), 3768 states have call successors, (3800) [2022-11-23 14:45:37,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13106 states to 13106 states and 18950 transitions. [2022-11-23 14:45:37,421 INFO L78 Accepts]: Start accepts. Automaton has 13106 states and 18950 transitions. Word has length 185 [2022-11-23 14:45:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:37,425 INFO L495 AbstractCegarLoop]: Abstraction has 13106 states and 18950 transitions. [2022-11-23 14:45:37,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 13106 states and 18950 transitions. [2022-11-23 14:45:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-23 14:45:37,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:37,437 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:37,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:45:37,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1860960419, now seen corresponding path program 1 times [2022-11-23 14:45:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:37,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053149627] [2022-11-23 14:45:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:37,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:45:38,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:38,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053149627] [2022-11-23 14:45:38,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053149627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:38,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:38,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170265502] [2022-11-23 14:45:38,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:38,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:38,189 INFO L87 Difference]: Start difference. First operand 13106 states and 18950 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:43,700 INFO L93 Difference]: Finished difference Result 24664 states and 35626 transitions. [2022-11-23 14:45:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 184 [2022-11-23 14:45:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:43,767 INFO L225 Difference]: With dead ends: 24664 [2022-11-23 14:45:43,767 INFO L226 Difference]: Without dead ends: 13193 [2022-11-23 14:45:43,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:45:43,811 INFO L413 NwaCegarLoop]: 1859 mSDtfsCounter, 1668 mSDsluCounter, 5196 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1672 SdHoareTripleChecker+Valid, 7055 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:43,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1672 Valid, 7055 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 14:45:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13193 states. [2022-11-23 14:45:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13193 to 13122. [2022-11-23 14:45:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13122 states, 8373 states have (on average 1.361160874238624) internal successors, (11397), 8775 states have internal predecessors, (11397), 3765 states have call successors, (3765), 984 states have call predecessors, (3765), 983 states have return successors, (3796), 3588 states have call predecessors, (3796), 3764 states have call successors, (3796) [2022-11-23 14:45:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13122 states to 13122 states and 18958 transitions. [2022-11-23 14:45:44,546 INFO L78 Accepts]: Start accepts. Automaton has 13122 states and 18958 transitions. Word has length 184 [2022-11-23 14:45:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:44,547 INFO L495 AbstractCegarLoop]: Abstraction has 13122 states and 18958 transitions. [2022-11-23 14:45:44,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 13122 states and 18958 transitions. [2022-11-23 14:45:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-23 14:45:44,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:44,558 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:44,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:45:44,558 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:44,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:44,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1881931699, now seen corresponding path program 1 times [2022-11-23 14:45:44,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:44,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779045881] [2022-11-23 14:45:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:44,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-11-23 14:45:45,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:45,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779045881] [2022-11-23 14:45:45,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779045881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:45,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332543011] [2022-11-23 14:45:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:45,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:45,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:45,640 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:45,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:45:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:47,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 5219 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:45:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:45:47,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:45:47,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332543011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:47,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:45:47,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-23 14:45:47,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034296687] [2022-11-23 14:45:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:47,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:47,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:45:47,509 INFO L87 Difference]: Start difference. First operand 13122 states and 18958 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:45:48,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:50,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:52,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:45:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:56,528 INFO L93 Difference]: Finished difference Result 24648 states and 35586 transitions. [2022-11-23 14:45:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:56,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 185 [2022-11-23 14:45:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:56,592 INFO L225 Difference]: With dead ends: 24648 [2022-11-23 14:45:56,592 INFO L226 Difference]: Without dead ends: 13185 [2022-11-23 14:45:56,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:45:56,629 INFO L413 NwaCegarLoop]: 1856 mSDtfsCounter, 1664 mSDsluCounter, 5196 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1668 SdHoareTripleChecker+Valid, 7052 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:56,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1668 Valid, 7052 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 696 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-11-23 14:45:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13185 states. [2022-11-23 14:45:57,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13185 to 13102. [2022-11-23 14:45:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13102 states, 8365 states have (on average 1.3605499103407053) internal successors, (11381), 8763 states have internal predecessors, (11381), 3753 states have call successors, (3753), 984 states have call predecessors, (3753), 983 states have return successors, (3784), 3580 states have call predecessors, (3784), 3752 states have call successors, (3784) [2022-11-23 14:45:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13102 states to 13102 states and 18918 transitions. [2022-11-23 14:45:57,500 INFO L78 Accepts]: Start accepts. Automaton has 13102 states and 18918 transitions. Word has length 185 [2022-11-23 14:45:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:57,501 INFO L495 AbstractCegarLoop]: Abstraction has 13102 states and 18918 transitions. [2022-11-23 14:45:57,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 3 states have internal predecessors, (73), 2 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 14:45:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 13102 states and 18918 transitions. [2022-11-23 14:45:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-23 14:45:57,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:57,512 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:57,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:57,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:45:57,727 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2132750715, now seen corresponding path program 1 times [2022-11-23 14:45:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427019041] [2022-11-23 14:45:57,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:57,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:45:58,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:58,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427019041] [2022-11-23 14:45:58,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427019041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:58,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:58,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:45:58,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480026692] [2022-11-23 14:45:58,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:58,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:45:58,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:58,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:45:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:45:58,436 INFO L87 Difference]: Start difference. First operand 13102 states and 18918 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:45:59,887 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 [] [2022-11-23 14:46:01,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:04,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:05,964 INFO L93 Difference]: Finished difference Result 23844 states and 34401 transitions. [2022-11-23 14:46:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:05,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 186 [2022-11-23 14:46:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:06,030 INFO L225 Difference]: With dead ends: 23844 [2022-11-23 14:46:06,031 INFO L226 Difference]: Without dead ends: 13198 [2022-11-23 14:46:06,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:46:06,067 INFO L413 NwaCegarLoop]: 1523 mSDtfsCounter, 1667 mSDsluCounter, 3031 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:06,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1671 Valid, 4554 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-23 14:46:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13198 states. [2022-11-23 14:46:06,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13198 to 13126. [2022-11-23 14:46:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13126 states, 8389 states have (on average 1.3595184169746095) internal successors, (11405), 8781 states have internal predecessors, (11405), 3747 states have call successors, (3747), 990 states have call predecessors, (3747), 989 states have return successors, (3778), 3580 states have call predecessors, (3778), 3746 states have call successors, (3778) [2022-11-23 14:46:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13126 states to 13126 states and 18930 transitions. [2022-11-23 14:46:06,897 INFO L78 Accepts]: Start accepts. Automaton has 13126 states and 18930 transitions. Word has length 186 [2022-11-23 14:46:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:06,898 INFO L495 AbstractCegarLoop]: Abstraction has 13126 states and 18930 transitions. [2022-11-23 14:46:06,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:46:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 13126 states and 18930 transitions. [2022-11-23 14:46:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-23 14:46:06,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:06,912 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:06,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:46:06,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:06,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1724705356, now seen corresponding path program 1 times [2022-11-23 14:46:06,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:06,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786506575] [2022-11-23 14:46:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:06,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:46:07,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786506575] [2022-11-23 14:46:07,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786506575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:07,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:07,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397859037] [2022-11-23 14:46:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:07,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:07,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:07,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:07,612 INFO L87 Difference]: Start difference. First operand 13126 states and 18930 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:46:09,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:13,038 INFO L93 Difference]: Finished difference Result 23898 states and 34425 transitions. [2022-11-23 14:46:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:13,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 187 [2022-11-23 14:46:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:13,110 INFO L225 Difference]: With dead ends: 23898 [2022-11-23 14:46:13,111 INFO L226 Difference]: Without dead ends: 13222 [2022-11-23 14:46:13,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:46:13,143 INFO L413 NwaCegarLoop]: 1523 mSDtfsCounter, 1665 mSDsluCounter, 3031 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1669 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:13,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1669 Valid, 4554 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 14:46:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2022-11-23 14:46:13,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 13150. [2022-11-23 14:46:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13150 states, 8413 states have (on average 1.3584928087483656) internal successors, (11429), 8799 states have internal predecessors, (11429), 3741 states have call successors, (3741), 996 states have call predecessors, (3741), 995 states have return successors, (3772), 3580 states have call predecessors, (3772), 3740 states have call successors, (3772) [2022-11-23 14:46:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13150 states to 13150 states and 18942 transitions. [2022-11-23 14:46:14,065 INFO L78 Accepts]: Start accepts. Automaton has 13150 states and 18942 transitions. Word has length 187 [2022-11-23 14:46:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:14,066 INFO L495 AbstractCegarLoop]: Abstraction has 13150 states and 18942 transitions. [2022-11-23 14:46:14,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 states have internal predecessors, (75), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:46:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 13150 states and 18942 transitions. [2022-11-23 14:46:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 14:46:14,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:14,079 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:14,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:46:14,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash -162157730, now seen corresponding path program 1 times [2022-11-23 14:46:14,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:14,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328630310] [2022-11-23 14:46:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:14,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:46:14,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328630310] [2022-11-23 14:46:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328630310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:14,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:46:14,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:46:14,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629499081] [2022-11-23 14:46:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:14,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:46:14,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:14,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:46:14,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:46:14,691 INFO L87 Difference]: Start difference. First operand 13150 states and 18942 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:46:16,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:19,839 INFO L93 Difference]: Finished difference Result 23568 states and 33889 transitions. [2022-11-23 14:46:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:46:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 188 [2022-11-23 14:46:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:19,906 INFO L225 Difference]: With dead ends: 23568 [2022-11-23 14:46:19,906 INFO L226 Difference]: Without dead ends: 12862 [2022-11-23 14:46:19,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:46:19,945 INFO L413 NwaCegarLoop]: 1523 mSDtfsCounter, 1663 mSDsluCounter, 3031 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 4554 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:19,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 4554 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 14:46:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12862 states. [2022-11-23 14:46:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12862 to 12808. [2022-11-23 14:46:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12808 states, 8192 states have (on average 1.3575439453125) internal successors, (11121), 8560 states have internal predecessors, (11121), 3627 states have call successors, (3627), 989 states have call predecessors, (3627), 988 states have return successors, (3658), 3474 states have call predecessors, (3658), 3626 states have call successors, (3658) [2022-11-23 14:46:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12808 states to 12808 states and 18406 transitions. [2022-11-23 14:46:20,930 INFO L78 Accepts]: Start accepts. Automaton has 12808 states and 18406 transitions. Word has length 188 [2022-11-23 14:46:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:20,931 INFO L495 AbstractCegarLoop]: Abstraction has 12808 states and 18406 transitions. [2022-11-23 14:46:20,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-11-23 14:46:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 12808 states and 18406 transitions. [2022-11-23 14:46:20,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-23 14:46:20,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:20,944 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:20,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:46:20,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash -80521531, now seen corresponding path program 1 times [2022-11-23 14:46:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:20,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993890713] [2022-11-23 14:46:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:20,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:46:22,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:22,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993890713] [2022-11-23 14:46:22,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993890713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:22,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673682737] [2022-11-23 14:46:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:22,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:22,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:22,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:46:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:23,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 5280 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:46:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:46:23,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:46:23,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673682737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:23,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:46:23,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-23 14:46:23,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026457332] [2022-11-23 14:46:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:46:23,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:46:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:46:23,849 INFO L87 Difference]: Start difference. First operand 12808 states and 18406 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:46:25,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:27,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:29,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:46:40,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:40,360 INFO L93 Difference]: Finished difference Result 30190 states and 43384 transitions. [2022-11-23 14:46:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:46:40,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 196 [2022-11-23 14:46:40,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:40,464 INFO L225 Difference]: With dead ends: 30190 [2022-11-23 14:46:40,465 INFO L226 Difference]: Without dead ends: 21407 [2022-11-23 14:46:40,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:46:40,503 INFO L413 NwaCegarLoop]: 2473 mSDtfsCounter, 1709 mSDsluCounter, 11347 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 13820 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:40,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 13820 Invalid, 1517 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1514 Invalid, 1 Unknown, 0 Unchecked, 15.4s Time] [2022-11-23 14:46:40,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21407 states. [2022-11-23 14:46:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21407 to 21232. [2022-11-23 14:46:41,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21232 states, 13591 states have (on average 1.358472518578471) internal successors, (18463), 14215 states have internal predecessors, (18463), 5995 states have call successors, (5995), 1638 states have call predecessors, (5995), 1645 states have return successors, (6078), 5732 states have call predecessors, (6078), 5994 states have call successors, (6078) [2022-11-23 14:46:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21232 states to 21232 states and 30536 transitions. [2022-11-23 14:46:41,716 INFO L78 Accepts]: Start accepts. Automaton has 21232 states and 30536 transitions. Word has length 196 [2022-11-23 14:46:41,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:41,717 INFO L495 AbstractCegarLoop]: Abstraction has 21232 states and 30536 transitions. [2022-11-23 14:46:41,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:46:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 21232 states and 30536 transitions. [2022-11-23 14:46:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-23 14:46:41,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:41,732 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:41,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:41,947 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1729784432, now seen corresponding path program 1 times [2022-11-23 14:46:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494034051] [2022-11-23 14:46:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:46:43,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:43,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494034051] [2022-11-23 14:46:43,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494034051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:43,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885972051] [2022-11-23 14:46:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:43,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:43,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:43,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:43,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:46:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 5282 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:46:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:46:44,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:46:44,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885972051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:46:44,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:46:44,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-23 14:46:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955714552] [2022-11-23 14:46:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:46:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:46:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:46:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:46:44,653 INFO L87 Difference]: Start difference. First operand 21232 states and 30536 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:46:46,108 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 [] [2022-11-23 14:46:53,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:46:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:58,010 INFO L93 Difference]: Finished difference Result 47082 states and 67684 transitions. [2022-11-23 14:46:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:46:58,010 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 197 [2022-11-23 14:46:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:58,137 INFO L225 Difference]: With dead ends: 47082 [2022-11-23 14:46:58,138 INFO L226 Difference]: Without dead ends: 29875 [2022-11-23 14:46:58,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:46:58,196 INFO L413 NwaCegarLoop]: 2613 mSDtfsCounter, 1709 mSDsluCounter, 11907 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 14520 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:58,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 14520 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-11-23 14:46:58,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29875 states. [2022-11-23 14:46:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29875 to 29676. [2022-11-23 14:46:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29676 states, 19002 states have (on average 1.3586464582675508) internal successors, (25817), 19894 states have internal predecessors, (25817), 8363 states have call successors, (8363), 2287 states have call predecessors, (8363), 2310 states have return successors, (8510), 7986 states have call predecessors, (8510), 8362 states have call successors, (8510) [2022-11-23 14:46:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29676 states to 29676 states and 42690 transitions. [2022-11-23 14:46:59,984 INFO L78 Accepts]: Start accepts. Automaton has 29676 states and 42690 transitions. Word has length 197 [2022-11-23 14:46:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:59,984 INFO L495 AbstractCegarLoop]: Abstraction has 29676 states and 42690 transitions. [2022-11-23 14:46:59,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:46:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 29676 states and 42690 transitions. [2022-11-23 14:47:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-11-23 14:47:00,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:00,010 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:00,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:00,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:47:00,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:00,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2134358910, now seen corresponding path program 1 times [2022-11-23 14:47:00,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:00,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654121990] [2022-11-23 14:47:00,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:00,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:47:01,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654121990] [2022-11-23 14:47:01,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654121990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876965823] [2022-11-23 14:47:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:01,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:01,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:01,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:47:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:02,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 5284 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:47:02,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:47:02,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:47:02,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876965823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:02,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:47:02,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-23 14:47:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084351430] [2022-11-23 14:47:02,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:47:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:47:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:47:02,888 INFO L87 Difference]: Start difference. First operand 29676 states and 42690 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:47:04,521 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 [] [2022-11-23 14:47:05,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:07,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:09,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:12,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:17,593 INFO L93 Difference]: Finished difference Result 63962 states and 91976 transitions. [2022-11-23 14:47:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:47:17,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 198 [2022-11-23 14:47:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:17,757 INFO L225 Difference]: With dead ends: 63962 [2022-11-23 14:47:17,757 INFO L226 Difference]: Without dead ends: 38311 [2022-11-23 14:47:17,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:47:17,832 INFO L413 NwaCegarLoop]: 2008 mSDtfsCounter, 1709 mSDsluCounter, 9487 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 11495 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:17,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 11495 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1145 Invalid, 2 Unknown, 0 Unchecked, 12.5s Time] [2022-11-23 14:47:17,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38311 states. [2022-11-23 14:47:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38311 to 29680. [2022-11-23 14:47:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29680 states, 19006 states have (on average 1.3585709775860255) internal successors, (25821), 19894 states have internal predecessors, (25821), 8363 states have call successors, (8363), 2287 states have call predecessors, (8363), 2310 states have return successors, (8510), 7990 states have call predecessors, (8510), 8362 states have call successors, (8510) [2022-11-23 14:47:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29680 states to 29680 states and 42694 transitions. [2022-11-23 14:47:19,832 INFO L78 Accepts]: Start accepts. Automaton has 29680 states and 42694 transitions. Word has length 198 [2022-11-23 14:47:19,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:19,833 INFO L495 AbstractCegarLoop]: Abstraction has 29680 states and 42694 transitions. [2022-11-23 14:47:19,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 5 states have internal predecessors, (84), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:47:19,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29680 states and 42694 transitions. [2022-11-23 14:47:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-23 14:47:19,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:19,854 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:19,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:20,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:47:20,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:20,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1437358123, now seen corresponding path program 1 times [2022-11-23 14:47:20,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:20,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26323500] [2022-11-23 14:47:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:20,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-11-23 14:47:20,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:20,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26323500] [2022-11-23 14:47:20,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26323500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:20,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:47:20,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:47:20,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451371827] [2022-11-23 14:47:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:20,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:47:20,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:47:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:47:20,493 INFO L87 Difference]: Start difference. First operand 29680 states and 42694 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:47:21,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:25,265 INFO L93 Difference]: Finished difference Result 30922 states and 43907 transitions. [2022-11-23 14:47:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:47:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 215 [2022-11-23 14:47:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:25,354 INFO L225 Difference]: With dead ends: 30922 [2022-11-23 14:47:25,354 INFO L226 Difference]: Without dead ends: 30919 [2022-11-23 14:47:25,366 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 [2022-11-23 14:47:25,366 INFO L413 NwaCegarLoop]: 1540 mSDtfsCounter, 699 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:25,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 2426 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 14:47:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30919 states. [2022-11-23 14:47:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30919 to 30919. [2022-11-23 14:47:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30919 states, 19654 states have (on average 1.3496489264271905) internal successors, (26526), 20542 states have internal predecessors, (26526), 8609 states have call successors, (8609), 2632 states have call predecessors, (8609), 2655 states have return successors, (8756), 8236 states have call predecessors, (8756), 8608 states have call successors, (8756) [2022-11-23 14:47:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30919 states to 30919 states and 43891 transitions. [2022-11-23 14:47:27,073 INFO L78 Accepts]: Start accepts. Automaton has 30919 states and 43891 transitions. Word has length 215 [2022-11-23 14:47:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:27,074 INFO L495 AbstractCegarLoop]: Abstraction has 30919 states and 43891 transitions. [2022-11-23 14:47:27,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:47:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 30919 states and 43891 transitions. [2022-11-23 14:47:27,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-23 14:47:27,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:27,096 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:27,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:47:27,096 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash 820436649, now seen corresponding path program 1 times [2022-11-23 14:47:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474970509] [2022-11-23 14:47:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:27,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-11-23 14:47:28,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:28,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474970509] [2022-11-23 14:47:28,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474970509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:28,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142427046] [2022-11-23 14:47:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:28,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:28,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:28,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:47:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:29,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 5286 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:47:29,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:47:29,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:47:29,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142427046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:47:29,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:47:29,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-23 14:47:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041840248] [2022-11-23 14:47:29,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:47:29,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:47:29,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:29,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:47:29,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:47:29,941 INFO L87 Difference]: Start difference. First operand 30919 states and 43891 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:47:32,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:38,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:47:40,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:47:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:42,747 INFO L93 Difference]: Finished difference Result 66637 states and 94561 transitions. [2022-11-23 14:47:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:47:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 199 [2022-11-23 14:47:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:42,873 INFO L225 Difference]: With dead ends: 66637 [2022-11-23 14:47:42,873 INFO L226 Difference]: Without dead ends: 39918 [2022-11-23 14:47:42,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:47:42,927 INFO L413 NwaCegarLoop]: 2008 mSDtfsCounter, 1709 mSDsluCounter, 9487 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 11495 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:42,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 11495 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1145 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2022-11-23 14:47:42,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39918 states. [2022-11-23 14:47:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39918 to 30939. [2022-11-23 14:47:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30939 states, 19670 states have (on average 1.3493645144890696) internal successors, (26542), 20554 states have internal predecessors, (26542), 8609 states have call successors, (8609), 2632 states have call predecessors, (8609), 2659 states have return successors, (8760), 8244 states have call predecessors, (8760), 8608 states have call successors, (8760) [2022-11-23 14:47:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30939 states to 30939 states and 43911 transitions. [2022-11-23 14:47:45,086 INFO L78 Accepts]: Start accepts. Automaton has 30939 states and 43911 transitions. Word has length 199 [2022-11-23 14:47:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:45,087 INFO L495 AbstractCegarLoop]: Abstraction has 30939 states and 43911 transitions. [2022-11-23 14:47:45,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 5 states have internal predecessors, (85), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-23 14:47:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 30939 states and 43911 transitions. [2022-11-23 14:47:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-11-23 14:47:45,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:45,106 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:47:45,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:45,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:47:45,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1225493212, now seen corresponding path program 1 times [2022-11-23 14:47:45,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:45,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960929729] [2022-11-23 14:47:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-23 14:47:46,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960929729] [2022-11-23 14:47:46,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960929729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022258575] [2022-11-23 14:47:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:46,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:46,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:46,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:46,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d829ab07-1a82-4120-a102-d35ad7b2e148/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:47:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:47,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 5292 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:47:47,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:47:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-23 14:47:48,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022258575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:48,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109572694] [2022-11-23 14:47:48,835 INFO L159 IcfgInterpreter]: Started Sifa with 117 locations of interest [2022-11-23 14:47:48,836 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:48,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:48,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:48,846 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:02,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-23 14:48:02,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-23 14:48:03,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-23 14:48:04,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-23 14:48:07,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:08,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:08,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:08,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:08,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:08,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:10,972 INFO L217 Elim1Store]: Index analysis took 3954 ms