./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--class--cdc-acm.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_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/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_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/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--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/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_21bd774b-9f08-4e81-9e25-37587b52b44d/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 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- 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 15:54:43,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:54:43,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:54:43,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:54:43,286 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:54:43,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:54:43,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:54:43,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:54:43,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:54:43,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:54:43,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:54:43,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:54:43,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:54:43,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:54:43,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:54:43,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:54:43,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:54:43,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:54:43,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:54:43,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:54:43,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:54:43,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:54:43,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:54:43,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:54:43,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:54:43,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:54:43,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:54:43,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:54:43,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:54:43,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:54:43,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:54:43,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:54:43,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:54:43,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:54:43,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:54:43,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:54:43,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:54:43,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:54:43,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:54:43,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:54:43,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:54:43,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:54:43,406 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:54:43,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:54:43,407 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:54:43,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:54:43,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:54:43,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:54:43,409 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:54:43,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:54:43,409 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:54:43,410 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:54:43,411 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:54:43,411 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:54:43,411 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:54:43,411 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:54:43,412 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:54:43,412 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:54:43,412 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:54:43,412 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:54:43,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:54:43,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:54:43,414 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:54:43,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:54:43,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:54:43,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:54:43,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:54:43,415 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:54:43,415 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:54:43,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:54:43,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:54:43,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:54:43,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:54:43,417 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:54:43,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:54:43,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:54:43,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:54:43,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:54:43,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:54:43,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:54:43,428 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_21bd774b-9f08-4e81-9e25-37587b52b44d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2022-11-23 15:54:43,732 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:54:43,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:54:43,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:54:43,771 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:54:43,772 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:54:43,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2022-11-23 15:54:46,899 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:54:47,555 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:54:47,556 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2022-11-23 15:54:47,596 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/data/07ff3bd51/d6886785bfcc40ccb29d80a76ff7f86c/FLAG2d4aae64c [2022-11-23 15:54:47,614 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/data/07ff3bd51/d6886785bfcc40ccb29d80a76ff7f86c [2022-11-23 15:54:47,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:54:47,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:54:47,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:54:47,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:54:47,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:54:47,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:47" (1/1) ... [2022-11-23 15:54:47,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77427387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:47, skipping insertion in model container [2022-11-23 15:54:47,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:47" (1/1) ... [2022-11-23 15:54:47,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:54:47,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:54:50,257 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_21bd774b-9f08-4e81-9e25-37587b52b44d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2022-11-23 15:54:50,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:50,404 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:54:50,768 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_21bd774b-9f08-4e81-9e25-37587b52b44d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2022-11-23 15:54:50,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:54:51,003 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:54:51,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51 WrapperNode [2022-11-23 15:54:51,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:54:51,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:51,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:54:51,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:54:51,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,474 INFO L138 Inliner]: procedures = 286, calls = 3934, calls flagged for inlining = 140, calls inlined = 119, statements flattened = 8095 [2022-11-23 15:54:51,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:54:51,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:54:51,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:54:51,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:54:51,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,823 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:54:51,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:54:51,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:54:51,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:54:51,973 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (1/1) ... [2022-11-23 15:54:51,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:54:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:54:52,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:54:52,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:54:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2022-11-23 15:54:52,084 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2022-11-23 15:54:52,084 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2022-11-23 15:54:52,084 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2022-11-23 15:54:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2022-11-23 15:54:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-23 15:54:52,085 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-23 15:54:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-23 15:54:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 15:54:52,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:54:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 15:54:52,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 15:54:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 15:54:52,086 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 15:54:52,086 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2022-11-23 15:54:52,087 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2022-11-23 15:54:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2022-11-23 15:54:52,087 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2022-11-23 15:54:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-23 15:54:52,087 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-23 15:54:52,087 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-23 15:54:52,088 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-23 15:54:52,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-23 15:54:52,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-23 15:54:52,089 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 15:54:52,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 15:54:52,090 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-23 15:54:52,090 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-23 15:54:52,091 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2022-11-23 15:54:52,091 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2022-11-23 15:54:52,092 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2022-11-23 15:54:52,092 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2022-11-23 15:54:52,092 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 15:54:52,092 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 15:54:52,093 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-23 15:54:52,093 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-23 15:54:52,093 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 15:54:52,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 15:54:52,094 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2022-11-23 15:54:52,094 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2022-11-23 15:54:52,094 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-23 15:54:52,095 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-23 15:54:52,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-23 15:54:52,095 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-23 15:54:52,095 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:54:52,095 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:54:52,096 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 15:54:52,096 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 15:54:52,096 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2022-11-23 15:54:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2022-11-23 15:54:52,097 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2022-11-23 15:54:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2022-11-23 15:54:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2022-11-23 15:54:52,098 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2022-11-23 15:54:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:54:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 15:54:52,099 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 15:54:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-23 15:54:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2022-11-23 15:54:52,099 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2022-11-23 15:54:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-23 15:54:52,100 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-23 15:54:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:54:52,100 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2022-11-23 15:54:52,100 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2022-11-23 15:54:52,101 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2022-11-23 15:54:52,101 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2022-11-23 15:54:52,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-23 15:54:52,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-23 15:54:52,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-23 15:54:52,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-23 15:54:52,102 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 15:54:52,102 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 15:54:52,102 INFO L130 BoogieDeclarations]: Found specification of procedure acm_softint [2022-11-23 15:54:52,103 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_softint [2022-11-23 15:54:52,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:54:52,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:54:52,103 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-23 15:54:52,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-23 15:54:52,105 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2022-11-23 15:54:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2022-11-23 15:54:52,105 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 15:54:52,105 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 15:54:52,105 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-23 15:54:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-23 15:54:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2022-11-23 15:54:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2022-11-23 15:54:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-23 15:54:52,106 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-23 15:54:52,106 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2022-11-23 15:54:52,107 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2022-11-23 15:54:52,107 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2022-11-23 15:54:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2022-11-23 15:54:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2022-11-23 15:54:52,109 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2022-11-23 15:54:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 15:54:52,109 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2022-11-23 15:54:52,109 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2022-11-23 15:54:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-11-23 15:54:52,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-11-23 15:54:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 15:54:52,110 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2022-11-23 15:54:52,111 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2022-11-23 15:54:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:54:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2022-11-23 15:54:52,111 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2022-11-23 15:54:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-23 15:54:52,112 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-23 15:54:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 15:54:52,113 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 15:54:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 15:54:52,116 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 15:54:52,117 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2022-11-23 15:54:52,117 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2022-11-23 15:54:52,118 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2022-11-23 15:54:52,118 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2022-11-23 15:54:52,118 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 15:54:52,119 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 15:54:52,120 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-23 15:54:52,120 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-23 15:54:52,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-23 15:54:52,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-23 15:54:52,126 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2022-11-23 15:54:52,126 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2022-11-23 15:54:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2022-11-23 15:54:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2022-11-23 15:54:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2022-11-23 15:54:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2022-11-23 15:54:52,127 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 15:54:52,127 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 15:54:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:54:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure acm_set_control [2022-11-23 15:54:52,128 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_set_control [2022-11-23 15:54:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 15:54:52,128 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 15:54:52,128 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2022-11-23 15:54:52,129 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2022-11-23 15:54:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2022-11-23 15:54:52,129 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2022-11-23 15:54:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2022-11-23 15:54:52,129 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2022-11-23 15:54:52,129 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-23 15:54:52,129 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-23 15:54:52,130 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 15:54:52,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 15:54:52,130 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-23 15:54:52,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-23 15:54:52,130 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2022-11-23 15:54:52,130 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2022-11-23 15:54:52,131 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2022-11-23 15:54:52,131 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2022-11-23 15:54:52,131 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 15:54:52,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 15:54:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:54:52,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 15:54:52,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 15:54:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:54:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:54:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-23 15:54:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-23 15:54:52,133 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-23 15:54:52,133 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_dtr_rts [2022-11-23 15:54:52,133 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_dtr_rts [2022-11-23 15:54:52,134 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-23 15:54:52,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-23 15:54:52,134 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-23 15:54:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-23 15:54:52,135 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2022-11-23 15:54:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2022-11-23 15:54:52,135 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2022-11-23 15:54:52,135 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2022-11-23 15:54:52,135 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2022-11-23 15:54:52,136 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2022-11-23 15:54:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2022-11-23 15:54:52,136 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2022-11-23 15:54:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-11-23 15:54:52,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-11-23 15:54:52,136 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 15:54:52,136 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 15:54:52,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:54:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-23 15:54:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-23 15:54:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-23 15:54:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-23 15:54:52,138 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2022-11-23 15:54:52,138 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2022-11-23 15:54:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:54:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:54:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2022-11-23 15:54:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2022-11-23 15:54:52,139 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 15:54:52,139 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 15:54:52,933 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:54:52,936 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:54:53,220 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 15:55:13,143 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:55:15,011 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:55:15,012 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:55:15,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:15 BoogieIcfgContainer [2022-11-23 15:55:15,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:55:15,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:55:15,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:55:15,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:55:15,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:47" (1/3) ... [2022-11-23 15:55:15,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb1acdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:15, skipping insertion in model container [2022-11-23 15:55:15,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:51" (2/3) ... [2022-11-23 15:55:15,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb1acdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:55:15, skipping insertion in model container [2022-11-23 15:55:15,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:55:15" (3/3) ... [2022-11-23 15:55:15,031 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2022-11-23 15:55:15,051 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:55:15,052 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:55:15,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:55:15,155 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;@1567b860, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:55:15,156 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:55:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 1151 states, 721 states have (on average 1.3564493758668517) internal successors, (978), 737 states have internal predecessors, (978), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) [2022-11-23 15:55:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-23 15:55:15,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:15,214 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:15,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:15,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1351770065, now seen corresponding path program 1 times [2022-11-23 15:55:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283436198] [2022-11-23 15:55:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1106 trivial. 0 not checked. [2022-11-23 15:55:17,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:17,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283436198] [2022-11-23 15:55:17,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283436198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:17,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:17,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:55:17,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369501023] [2022-11-23 15:55:17,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:17,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:17,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:17,547 INFO L87 Difference]: Start difference. First operand has 1151 states, 721 states have (on average 1.3564493758668517) internal successors, (978), 737 states have internal predecessors, (978), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:55:18,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:21,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:25,282 WARN L539 Checker$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 15:55:26,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:26,369 INFO L93 Difference]: Finished difference Result 3253 states and 4710 transitions. [2022-11-23 15:55:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:26,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 274 [2022-11-23 15:55:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:26,401 INFO L225 Difference]: With dead ends: 3253 [2022-11-23 15:55:26,402 INFO L226 Difference]: Without dead ends: 2116 [2022-11-23 15:55:26,413 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 15:55:26,418 INFO L413 NwaCegarLoop]: 1730 mSDtfsCounter, 1484 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 3091 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:26,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1484 Valid, 3091 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 437 Invalid, 2 Unknown, 0 Unchecked, 8.5s Time] [2022-11-23 15:55:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2022-11-23 15:55:26,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2112. [2022-11-23 15:55:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 1344 states have (on average 1.3489583333333333) internal successors, (1813), 1355 states have internal predecessors, (1813), 603 states have call successors, (603), 165 states have call predecessors, (603), 164 states have return successors, (602), 601 states have call predecessors, (602), 602 states have call successors, (602) [2022-11-23 15:55:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3018 transitions. [2022-11-23 15:55:26,675 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3018 transitions. Word has length 274 [2022-11-23 15:55:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:26,681 INFO L495 AbstractCegarLoop]: Abstraction has 2112 states and 3018 transitions. [2022-11-23 15:55:26,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-11-23 15:55:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3018 transitions. [2022-11-23 15:55:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-11-23 15:55:26,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:26,695 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:26,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:55:26,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:26,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1937999353, now seen corresponding path program 1 times [2022-11-23 15:55:26,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:26,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379453945] [2022-11-23 15:55:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:26,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1110 trivial. 0 not checked. [2022-11-23 15:55:27,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:27,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379453945] [2022-11-23 15:55:27,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379453945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:27,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:27,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:55:27,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296827756] [2022-11-23 15:55:27,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:27,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:27,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:27,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:27,972 INFO L87 Difference]: Start difference. First operand 2112 states and 3018 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:55:29,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:32,176 WARN L539 Checker$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 15:55:35,532 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 15:55:36,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:36,331 INFO L93 Difference]: Finished difference Result 5318 states and 7573 transitions. [2022-11-23 15:55:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:36,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 282 [2022-11-23 15:55:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:36,351 INFO L225 Difference]: With dead ends: 5318 [2022-11-23 15:55:36,352 INFO L226 Difference]: Without dead ends: 3255 [2022-11-23 15:55:36,359 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 15:55:36,360 INFO L413 NwaCegarLoop]: 1672 mSDtfsCounter, 946 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 3007 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:36,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 3007 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 449 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2022-11-23 15:55:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-11-23 15:55:36,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3252. [2022-11-23 15:55:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3252 states, 2103 states have (on average 1.3604374702805515) internal successors, (2861), 2119 states have internal predecessors, (2861), 881 states have call successors, (881), 268 states have call predecessors, (881), 267 states have return successors, (880), 878 states have call predecessors, (880), 880 states have call successors, (880) [2022-11-23 15:55:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3252 states to 3252 states and 4622 transitions. [2022-11-23 15:55:36,512 INFO L78 Accepts]: Start accepts. Automaton has 3252 states and 4622 transitions. Word has length 282 [2022-11-23 15:55:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:36,513 INFO L495 AbstractCegarLoop]: Abstraction has 3252 states and 4622 transitions. [2022-11-23 15:55:36,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 15:55:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3252 states and 4622 transitions. [2022-11-23 15:55:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-23 15:55:36,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:36,520 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:55:36,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:55:36,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1065883816, now seen corresponding path program 1 times [2022-11-23 15:55:36,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:36,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305061421] [2022-11-23 15:55:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1106 trivial. 0 not checked. [2022-11-23 15:55:37,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305061421] [2022-11-23 15:55:37,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305061421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:37,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:55:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247443652] [2022-11-23 15:55:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:37,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:37,739 INFO L87 Difference]: Start difference. First operand 3252 states and 4622 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 15:55:39,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:42,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:46,086 WARN L539 Checker$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 15:55:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:46,744 INFO L93 Difference]: Finished difference Result 7837 states and 11090 transitions. [2022-11-23 15:55:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 274 [2022-11-23 15:55:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:46,773 INFO L225 Difference]: With dead ends: 7837 [2022-11-23 15:55:46,773 INFO L226 Difference]: Without dead ends: 4634 [2022-11-23 15:55:46,787 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 15:55:46,788 INFO L413 NwaCegarLoop]: 1843 mSDtfsCounter, 792 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 3180 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:46,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 3180 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 559 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2022-11-23 15:55:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2022-11-23 15:55:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4615. [2022-11-23 15:55:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4615 states, 3019 states have (on average 1.3633653527658165) internal successors, (4116), 3039 states have internal predecessors, (4116), 1199 states have call successors, (1199), 397 states have call predecessors, (1199), 396 states have return successors, (1198), 1196 states have call predecessors, (1198), 1198 states have call successors, (1198) [2022-11-23 15:55:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4615 states to 4615 states and 6513 transitions. [2022-11-23 15:55:47,062 INFO L78 Accepts]: Start accepts. Automaton has 4615 states and 6513 transitions. Word has length 274 [2022-11-23 15:55:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:47,067 INFO L495 AbstractCegarLoop]: Abstraction has 4615 states and 6513 transitions. [2022-11-23 15:55:47,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-23 15:55:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4615 states and 6513 transitions. [2022-11-23 15:55:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-11-23 15:55:47,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:47,081 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:47,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:55:47,082 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash -887219900, now seen corresponding path program 1 times [2022-11-23 15:55:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:47,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137260896] [2022-11-23 15:55:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:47,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1106 trivial. 0 not checked. [2022-11-23 15:55:48,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137260896] [2022-11-23 15:55:48,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137260896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:48,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:48,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:55:48,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278400459] [2022-11-23 15:55:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:48,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:55:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:55:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:55:48,363 INFO L87 Difference]: Start difference. First operand 4615 states and 6513 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 15:55:50,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:55:52,588 WARN L539 Checker$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 15:55:55,670 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 15:55:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:55:57,191 INFO L93 Difference]: Finished difference Result 13347 states and 18812 transitions. [2022-11-23 15:55:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:55:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 309 [2022-11-23 15:55:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:55:57,235 INFO L225 Difference]: With dead ends: 13347 [2022-11-23 15:55:57,235 INFO L226 Difference]: Without dead ends: 8781 [2022-11-23 15:55:57,249 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 15:55:57,250 INFO L413 NwaCegarLoop]: 1765 mSDtfsCounter, 1285 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:55:57,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 3173 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 421 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2022-11-23 15:55:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8781 states. [2022-11-23 15:55:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8781 to 7375. [2022-11-23 15:55:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7375 states, 4839 states have (on average 1.3692911758627815) internal successors, (6626), 4877 states have internal predecessors, (6626), 1898 states have call successors, (1898), 638 states have call predecessors, (1898), 637 states have return successors, (1897), 1887 states have call predecessors, (1897), 1897 states have call successors, (1897) [2022-11-23 15:55:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7375 states to 7375 states and 10421 transitions. [2022-11-23 15:55:57,625 INFO L78 Accepts]: Start accepts. Automaton has 7375 states and 10421 transitions. Word has length 309 [2022-11-23 15:55:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:55:57,625 INFO L495 AbstractCegarLoop]: Abstraction has 7375 states and 10421 transitions. [2022-11-23 15:55:57,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-23 15:55:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7375 states and 10421 transitions. [2022-11-23 15:55:57,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-11-23 15:55:57,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:55:57,639 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:55:57,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:55:57,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:55:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:55:57,640 INFO L85 PathProgramCache]: Analyzing trace with hash 116171236, now seen corresponding path program 1 times [2022-11-23 15:55:57,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:55:57,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191026066] [2022-11-23 15:55:57,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:55:57,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:55:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:55:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2022-11-23 15:55:59,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:55:59,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191026066] [2022-11-23 15:55:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191026066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:55:59,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:55:59,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:55:59,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902205397] [2022-11-23 15:55:59,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:55:59,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:55:59,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:55:59,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:55:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:55:59,318 INFO L87 Difference]: Start difference. First operand 7375 states and 10421 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 15:56:00,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:04,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:08,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:10,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:12,974 WARN L539 Checker$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 15:56:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:14,159 INFO L93 Difference]: Finished difference Result 14656 states and 20719 transitions. [2022-11-23 15:56:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:56:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 334 [2022-11-23 15:56:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:14,208 INFO L225 Difference]: With dead ends: 14656 [2022-11-23 15:56:14,208 INFO L226 Difference]: Without dead ends: 7330 [2022-11-23 15:56:14,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:56:14,231 INFO L413 NwaCegarLoop]: 1417 mSDtfsCounter, 1 mSDsluCounter, 2827 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4244 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:14,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4244 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 622 Invalid, 3 Unknown, 0 Unchecked, 14.6s Time] [2022-11-23 15:56:14,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2022-11-23 15:56:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 7324. [2022-11-23 15:56:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7324 states, 4807 states have (on average 1.3709174121073435) internal successors, (6590), 4846 states have internal predecessors, (6590), 1885 states have call successors, (1885), 632 states have call predecessors, (1885), 631 states have return successors, (1884), 1873 states have call predecessors, (1884), 1884 states have call successors, (1884) [2022-11-23 15:56:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7324 states to 7324 states and 10359 transitions. [2022-11-23 15:56:14,555 INFO L78 Accepts]: Start accepts. Automaton has 7324 states and 10359 transitions. Word has length 334 [2022-11-23 15:56:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:14,556 INFO L495 AbstractCegarLoop]: Abstraction has 7324 states and 10359 transitions. [2022-11-23 15:56:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2022-11-23 15:56:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7324 states and 10359 transitions. [2022-11-23 15:56:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-23 15:56:14,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:14,568 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:14,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:56:14,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:56:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash -490183190, now seen corresponding path program 1 times [2022-11-23 15:56:14,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:14,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015610706] [2022-11-23 15:56:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:14,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2022-11-23 15:56:15,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:15,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015610706] [2022-11-23 15:56:15,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015610706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:15,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:15,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:56:15,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406152837] [2022-11-23 15:56:15,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:15,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:15,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:15,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:15,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:15,991 INFO L87 Difference]: Start difference. First operand 7324 states and 10359 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-23 15:56:18,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:20,223 WARN L539 Checker$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 15:56:22,963 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 15:56:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:24,206 INFO L93 Difference]: Finished difference Result 12864 states and 18314 transitions. [2022-11-23 15:56:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 339 [2022-11-23 15:56:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:24,276 INFO L225 Difference]: With dead ends: 12864 [2022-11-23 15:56:24,276 INFO L226 Difference]: Without dead ends: 12861 [2022-11-23 15:56:24,284 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 15:56:24,285 INFO L413 NwaCegarLoop]: 1622 mSDtfsCounter, 1195 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 2854 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:24,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 2854 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 386 Invalid, 3 Unknown, 0 Unchecked, 7.9s Time] [2022-11-23 15:56:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12861 states. [2022-11-23 15:56:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12861 to 12615. [2022-11-23 15:56:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12615 states, 8416 states have (on average 1.3871197718631179) internal successors, (11674), 8509 states have internal predecessors, (11674), 3102 states have call successors, (3102), 1103 states have call predecessors, (3102), 1096 states have return successors, (3133), 3044 states have call predecessors, (3133), 3101 states have call successors, (3133) [2022-11-23 15:56:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12615 states to 12615 states and 17909 transitions. [2022-11-23 15:56:25,029 INFO L78 Accepts]: Start accepts. Automaton has 12615 states and 17909 transitions. Word has length 339 [2022-11-23 15:56:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:25,030 INFO L495 AbstractCegarLoop]: Abstraction has 12615 states and 17909 transitions. [2022-11-23 15:56:25,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2022-11-23 15:56:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 12615 states and 17909 transitions. [2022-11-23 15:56:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-11-23 15:56:25,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:25,047 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:25,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:56:25,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:56:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1538891596, now seen corresponding path program 1 times [2022-11-23 15:56:25,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983664375] [2022-11-23 15:56:25,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:25,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2022-11-23 15:56:26,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:26,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983664375] [2022-11-23 15:56:26,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983664375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:26,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:26,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:56:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913403043] [2022-11-23 15:56:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:26,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:26,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:26,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:26,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:26,381 INFO L87 Difference]: Start difference. First operand 12615 states and 17909 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-23 15:56:28,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:30,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:34,080 WARN L539 Checker$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 15:56:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:35,258 INFO L93 Difference]: Finished difference Result 27764 states and 39389 transitions. [2022-11-23 15:56:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:35,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 347 [2022-11-23 15:56:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:35,321 INFO L225 Difference]: With dead ends: 27764 [2022-11-23 15:56:35,321 INFO L226 Difference]: Without dead ends: 15206 [2022-11-23 15:56:35,362 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 15:56:35,363 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 854 mSDsluCounter, 1400 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:35,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 2982 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 427 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2022-11-23 15:56:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2022-11-23 15:56:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 11804. [2022-11-23 15:56:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 7857 states have (on average 1.3842433498790887) internal successors, (10876), 7943 states have internal predecessors, (10876), 2921 states have call successors, (2921), 1032 states have call predecessors, (2921), 1025 states have return successors, (2948), 2867 states have call predecessors, (2948), 2920 states have call successors, (2948) [2022-11-23 15:56:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 16745 transitions. [2022-11-23 15:56:35,930 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 16745 transitions. Word has length 347 [2022-11-23 15:56:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:35,931 INFO L495 AbstractCegarLoop]: Abstraction has 11804 states and 16745 transitions. [2022-11-23 15:56:35,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-23 15:56:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 16745 transitions. [2022-11-23 15:56:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-11-23 15:56:35,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:35,940 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:56:35,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:56:35,940 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:56:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:35,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1927470691, now seen corresponding path program 1 times [2022-11-23 15:56:35,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518999992] [2022-11-23 15:56:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:35,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2022-11-23 15:56:37,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:37,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518999992] [2022-11-23 15:56:37,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518999992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:37,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:37,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:56:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706581012] [2022-11-23 15:56:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:37,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:37,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:37,418 INFO L87 Difference]: Start difference. First operand 11804 states and 16745 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-23 15:56:39,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:41,651 WARN L539 Checker$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 15:56:44,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:46,815 WARN L539 Checker$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 15:56:48,844 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 15:56:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:56:50,254 INFO L93 Difference]: Finished difference Result 31509 states and 44663 transitions. [2022-11-23 15:56:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:56:50,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 339 [2022-11-23 15:56:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:56:50,349 INFO L225 Difference]: With dead ends: 31509 [2022-11-23 15:56:50,350 INFO L226 Difference]: Without dead ends: 19767 [2022-11-23 15:56:50,393 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 15:56:50,394 INFO L413 NwaCegarLoop]: 1809 mSDtfsCounter, 1149 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 53 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:56:50,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 3111 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 523 Invalid, 4 Unknown, 0 Unchecked, 12.3s Time] [2022-11-23 15:56:50,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19767 states. [2022-11-23 15:56:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19767 to 19719. [2022-11-23 15:56:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19719 states, 13249 states have (on average 1.3705185297003548) internal successors, (18158), 13395 states have internal predecessors, (18158), 4697 states have call successors, (4697), 1783 states have call predecessors, (4697), 1772 states have return successors, (4724), 4605 states have call predecessors, (4724), 4696 states have call successors, (4724) [2022-11-23 15:56:51,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19719 states to 19719 states and 27579 transitions. [2022-11-23 15:56:51,453 INFO L78 Accepts]: Start accepts. Automaton has 19719 states and 27579 transitions. Word has length 339 [2022-11-23 15:56:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:56:51,454 INFO L495 AbstractCegarLoop]: Abstraction has 19719 states and 27579 transitions. [2022-11-23 15:56:51,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-23 15:56:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 19719 states and 27579 transitions. [2022-11-23 15:56:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-11-23 15:56:51,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:56:51,469 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:56:51,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:56:51,470 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:56:51,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:56:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2013024413, now seen corresponding path program 1 times [2022-11-23 15:56:51,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:56:51,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073011446] [2022-11-23 15:56:51,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:56:51,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:56:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:56:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1564 trivial. 0 not checked. [2022-11-23 15:56:52,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:56:52,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073011446] [2022-11-23 15:56:52,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073011446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:56:52,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:56:52,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:56:52,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105742596] [2022-11-23 15:56:52,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:56:52,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:56:52,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:56:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:56:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:56:52,991 INFO L87 Difference]: Start difference. First operand 19719 states and 27579 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-23 15:56:54,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:55,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:56:58,001 WARN L539 Checker$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 15:57:02,125 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 15:57:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:57:03,455 INFO L93 Difference]: Finished difference Result 47400 states and 66259 transitions. [2022-11-23 15:57:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:57:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 356 [2022-11-23 15:57:03,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:57:03,565 INFO L225 Difference]: With dead ends: 47400 [2022-11-23 15:57:03,565 INFO L226 Difference]: Without dead ends: 27743 [2022-11-23 15:57:03,608 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 15:57:03,608 INFO L413 NwaCegarLoop]: 2183 mSDtfsCounter, 1081 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:57:03,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 3424 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 501 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2022-11-23 15:57:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27743 states. [2022-11-23 15:57:04,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27743 to 27732. [2022-11-23 15:57:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27732 states, 18826 states have (on average 1.3718261978115371) internal successors, (25826), 19022 states have internal predecessors, (25826), 6372 states have call successors, (6372), 2544 states have call predecessors, (6372), 2533 states have return successors, (6415), 6250 states have call predecessors, (6415), 6371 states have call successors, (6415) [2022-11-23 15:57:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27732 states to 27732 states and 38613 transitions. [2022-11-23 15:57:04,934 INFO L78 Accepts]: Start accepts. Automaton has 27732 states and 38613 transitions. Word has length 356 [2022-11-23 15:57:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:57:04,935 INFO L495 AbstractCegarLoop]: Abstraction has 27732 states and 38613 transitions. [2022-11-23 15:57:04,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2022-11-23 15:57:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 27732 states and 38613 transitions. [2022-11-23 15:57:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-11-23 15:57:04,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:57:04,961 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:57:04,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:57:04,962 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:57:04,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:57:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2116498138, now seen corresponding path program 1 times [2022-11-23 15:57:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:57:04,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094726724] [2022-11-23 15:57:04,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:04,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:57:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:57:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2022-11-23 15:57:12,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:57:12,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094726724] [2022-11-23 15:57:12,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094726724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:57:12,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372821176] [2022-11-23 15:57:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:12,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:57:12,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:57:12,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:57:12,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:57:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:57:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 10712 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:57:15,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:57:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2022-11-23 15:57:16,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:57:16,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372821176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:57:16,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:57:16,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:57:16,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669754923] [2022-11-23 15:57:16,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:57:16,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:57:16,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:57:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:57:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:57:16,047 INFO L87 Difference]: Start difference. First operand 27732 states and 38613 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2022-11-23 15:57:18,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:20,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:24,844 WARN L539 Checker$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 15:57:26,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:57:26,915 INFO L93 Difference]: Finished difference Result 53437 states and 74415 transitions. [2022-11-23 15:57:26,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:57:26,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 357 [2022-11-23 15:57:26,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:57:27,020 INFO L225 Difference]: With dead ends: 53437 [2022-11-23 15:57:27,020 INFO L226 Difference]: Without dead ends: 25723 [2022-11-23 15:57:27,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:57:27,075 INFO L413 NwaCegarLoop]: 1414 mSDtfsCounter, 5 mSDsluCounter, 4231 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5645 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:57:27,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 5645 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 825 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2022-11-23 15:57:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25723 states. [2022-11-23 15:57:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25723 to 25717. [2022-11-23 15:57:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25717 states, 17467 states have (on average 1.372645560199233) internal successors, (23976), 17652 states have internal predecessors, (23976), 5907 states have call successors, (5907), 2353 states have call predecessors, (5907), 2342 states have return successors, (5946), 5791 states have call predecessors, (5946), 5906 states have call successors, (5946) [2022-11-23 15:57:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25717 states to 25717 states and 35829 transitions. [2022-11-23 15:57:28,572 INFO L78 Accepts]: Start accepts. Automaton has 25717 states and 35829 transitions. Word has length 357 [2022-11-23 15:57:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:57:28,573 INFO L495 AbstractCegarLoop]: Abstraction has 25717 states and 35829 transitions. [2022-11-23 15:57:28,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2022-11-23 15:57:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 25717 states and 35829 transitions. [2022-11-23 15:57:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-11-23 15:57:28,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:57:28,590 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:57:28,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:57:28,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:57:28,816 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:57:28,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:57:28,817 INFO L85 PathProgramCache]: Analyzing trace with hash 667746261, now seen corresponding path program 1 times [2022-11-23 15:57:28,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:57:28,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557135635] [2022-11-23 15:57:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:29,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:57:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:57:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1569 trivial. 0 not checked. [2022-11-23 15:57:31,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:57:31,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557135635] [2022-11-23 15:57:31,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557135635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:57:31,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:57:31,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:57:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676745897] [2022-11-23 15:57:31,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:57:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:57:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:57:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:57:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:57:31,487 INFO L87 Difference]: Start difference. First operand 25717 states and 35829 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-23 15:57:32,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:34,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:36,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:57:38,856 WARN L539 Checker$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 15:57:44,719 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 15:57:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:57:46,602 INFO L93 Difference]: Finished difference Result 59302 states and 82688 transitions. [2022-11-23 15:57:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:57:46,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 368 [2022-11-23 15:57:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:57:46,743 INFO L225 Difference]: With dead ends: 59302 [2022-11-23 15:57:46,744 INFO L226 Difference]: Without dead ends: 33647 [2022-11-23 15:57:46,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:57:46,803 INFO L413 NwaCegarLoop]: 2026 mSDtfsCounter, 1374 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 21 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 4515 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:57:46,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1448 Valid, 4515 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1199 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2022-11-23 15:57:46,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33647 states. [2022-11-23 15:57:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33647 to 33555. [2022-11-23 15:57:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33555 states, 22953 states have (on average 1.3744172875005445) internal successors, (31547), 23185 states have internal predecessors, (31547), 7550 states have call successors, (7550), 3062 states have call predecessors, (7550), 3051 states have return successors, (7605), 7407 states have call predecessors, (7605), 7549 states have call successors, (7605) [2022-11-23 15:57:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33555 states to 33555 states and 46702 transitions. [2022-11-23 15:57:48,387 INFO L78 Accepts]: Start accepts. Automaton has 33555 states and 46702 transitions. Word has length 368 [2022-11-23 15:57:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:57:48,387 INFO L495 AbstractCegarLoop]: Abstraction has 33555 states and 46702 transitions. [2022-11-23 15:57:48,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-23 15:57:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 33555 states and 46702 transitions. [2022-11-23 15:57:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-11-23 15:57:48,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:57:48,400 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:57:48,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:57:48,401 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:57:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:57:48,401 INFO L85 PathProgramCache]: Analyzing trace with hash 275854025, now seen corresponding path program 1 times [2022-11-23 15:57:48,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:57:48,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765649724] [2022-11-23 15:57:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:48,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:57:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:57:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2022-11-23 15:57:53,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:57:53,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765649724] [2022-11-23 15:57:53,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765649724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:57:53,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994784112] [2022-11-23 15:57:53,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:57:53,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:57:53,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:57:53,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:57:53,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21bd774b-9f08-4e81-9e25-37587b52b44d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:58:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:58:05,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 10839 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 15:58:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:58:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 434 proven. 7 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2022-11-23 15:58:05,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:58:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2022-11-23 15:58:06,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994784112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:58:06,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659521078] [2022-11-23 15:58:06,387 INFO L159 IcfgInterpreter]: Started Sifa with 142 locations of interest [2022-11-23 15:58:06,387 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:58:06,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:58:06,398 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:58:06,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:58:32,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2022-11-23 15:58:34,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2022-11-23 15:58:36,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2022-11-23 15:58:39,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2022-11-23 15:58:41,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2022-11-23 15:58:44,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:47,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:47,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:58:51,951 INFO L217 Elim1Store]: Index analysis took 7938 ms