./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7 --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 7325716246446e6137919cda7fc42ef01fc613ff512d250d81e88f25c6debe0a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:16:03,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:16:03,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:16:03,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:16:03,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:16:03,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:16:03,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:16:03,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:16:03,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:16:03,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:16:03,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:16:03,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:16:03,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:16:03,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:16:03,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:16:03,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:16:03,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:16:03,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:16:03,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:16:03,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:16:03,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:16:03,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:16:03,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:16:03,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:16:03,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:16:03,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:16:03,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:16:03,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:16:03,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:16:03,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:16:03,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:16:03,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:16:03,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:16:03,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:16:03,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:16:03,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:16:03,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:16:03,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:16:03,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:16:03,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:16:03,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:16:03,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:16:03,344 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:16:03,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:16:03,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:16:03,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:16:03,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:16:03,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:16:03,346 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:16:03,346 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:16:03,346 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:16:03,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:16:03,347 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:16:03,347 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:16:03,347 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:16:03,347 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:16:03,348 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:16:03,348 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:16:03,348 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:16:03,348 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:16:03,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:16:03,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:16:03,349 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:16:03,349 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:16:03,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:16:03,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:16:03,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:16:03,350 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:16:03,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:16:03,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:16:03,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:16:03,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:16:03,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:16:03,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:16:03,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:16:03,359 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:16:03,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:16:03,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:16:03,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:16:03,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:16:03,361 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7325716246446e6137919cda7fc42ef01fc613ff512d250d81e88f25c6debe0a [2021-11-25 19:16:03,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:16:03,682 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:16:03,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:16:03,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:16:03,687 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:16:03,689 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i [2021-11-25 19:16:03,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/data/9a7203fd8/2c805e9d96754d5680674ae590e72fe6/FLAG16536941d [2021-11-25 19:16:04,561 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:16:04,561 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i [2021-11-25 19:16:04,594 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/data/9a7203fd8/2c805e9d96754d5680674ae590e72fe6/FLAG16536941d [2021-11-25 19:16:05,107 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/data/9a7203fd8/2c805e9d96754d5680674ae590e72fe6 [2021-11-25 19:16:05,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:16:05,111 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:16:05,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:16:05,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:16:05,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:16:05,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:16:05" (1/1) ... [2021-11-25 19:16:05,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af6a978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:05, skipping insertion in model container [2021-11-25 19:16:05,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:16:05" (1/1) ... [2021-11-25 19:16:05,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:16:05,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:16:06,097 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i[115804,115817] [2021-11-25 19:16:06,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:16:06,204 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:16:06,418 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/sv-benchmarks/c/ldv-linux-3.0/usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i[115804,115817] [2021-11-25 19:16:06,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:16:06,471 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:16:06,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06 WrapperNode [2021-11-25 19:16:06,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:16:06,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:16:06,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:16:06,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:16:06,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,571 INFO L137 Inliner]: procedures = 77, calls = 256, calls flagged for inlining = 29, calls inlined = 26, statements flattened = 728 [2021-11-25 19:16:06,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:16:06,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:16:06,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:16:06,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:16:06,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:16:06,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:16:06,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:16:06,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:16:06,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (1/1) ... [2021-11-25 19:16:06,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:16:06,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:06,780 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:16:06,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:16:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure kbtab_init [2021-11-25 19:16:06,834 INFO L138 BoogieDeclarations]: Found implementation of procedure kbtab_init [2021-11-25 19:16:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:16:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-25 19:16:06,837 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-25 19:16:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:16:06,837 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-25 19:16:06,838 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-25 19:16:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure kbtab_exit [2021-11-25 19:16:06,838 INFO L138 BoogieDeclarations]: Found implementation of procedure kbtab_exit [2021-11-25 19:16:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-25 19:16:06,870 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-25 19:16:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:16:06,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:16:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-25 19:16:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-25 19:16:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 19:16:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 19:16:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2021-11-25 19:16:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2021-11-25 19:16:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:16:06,871 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-25 19:16:06,871 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-25 19:16:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:16:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 19:16:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 19:16:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:16:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-25 19:16:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-25 19:16:06,872 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume_stop [2021-11-25 19:16:06,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_assume_stop [2021-11-25 19:16:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-25 19:16:06,873 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-25 19:16:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_pointer [2021-11-25 19:16:06,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_pointer [2021-11-25 19:16:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:16:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:16:06,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:16:06,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:16:07,193 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:16:07,204 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:16:07,397 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_assume_stopFINAL: assume true; [2021-11-25 19:16:07,417 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:16:08,300 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2021-11-25 19:16:08,300 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2021-11-25 19:16:08,318 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:16:08,566 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:16:08,567 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-25 19:16:08,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:16:08 BoogieIcfgContainer [2021-11-25 19:16:08,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:16:08,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:16:08,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:16:08,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:16:08,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:16:05" (1/3) ... [2021-11-25 19:16:08,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a6bc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:16:08, skipping insertion in model container [2021-11-25 19:16:08,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:16:06" (2/3) ... [2021-11-25 19:16:08,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a6bc35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:16:08, skipping insertion in model container [2021-11-25 19:16:08,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:16:08" (3/3) ... [2021-11-25 19:16:08,583 INFO L111 eAbstractionObserver]: Analyzing ICFG usb_urb-drivers-input-tablet-kbtab.ko.cil.out.i [2021-11-25 19:16:08,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:16:08,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:16:08,683 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:16:08,705 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:16:08,713 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:16:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 72 states have (on average 1.375) internal successors, (99), 80 states have internal predecessors, (99), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-25 19:16:08,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:16:08,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:08,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:08,753 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -85924309, now seen corresponding path program 1 times [2021-11-25 19:16:08,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:08,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708766201] [2021-11-25 19:16:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:08,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:09,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708766201] [2021-11-25 19:16:09,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708766201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:09,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:09,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:09,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622343981] [2021-11-25 19:16:09,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:09,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:09,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:09,420 INFO L87 Difference]: Start difference. First operand has 116 states, 72 states have (on average 1.375) internal successors, (99), 80 states have internal predecessors, (99), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:16:12,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:12,231 INFO L93 Difference]: Finished difference Result 310 states and 423 transitions. [2021-11-25 19:16:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-25 19:16:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:12,249 INFO L225 Difference]: With dead ends: 310 [2021-11-25 19:16:12,249 INFO L226 Difference]: Without dead ends: 192 [2021-11-25 19:16:12,254 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:16:12,259 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 109 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:12,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 240 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:16:12,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-25 19:16:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2021-11-25 19:16:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 127 states have internal predecessors, (153), 42 states have call successors, (42), 23 states have call predecessors, (42), 22 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-25 19:16:12,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 233 transitions. [2021-11-25 19:16:12,341 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 233 transitions. Word has length 10 [2021-11-25 19:16:12,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:12,342 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 233 transitions. [2021-11-25 19:16:12,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:16:12,342 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 233 transitions. [2021-11-25 19:16:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 19:16:12,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:12,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:12,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:16:12,345 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:12,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:12,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1631192007, now seen corresponding path program 1 times [2021-11-25 19:16:12,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:12,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844302580] [2021-11-25 19:16:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:12,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:12,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:12,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844302580] [2021-11-25 19:16:12,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844302580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:12,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:12,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:12,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812832564] [2021-11-25 19:16:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:12,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:12,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:12,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:12,522 INFO L87 Difference]: Start difference. First operand 187 states and 233 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:16:15,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:15,223 INFO L93 Difference]: Finished difference Result 445 states and 552 transitions. [2021-11-25 19:16:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 19:16:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:15,230 INFO L225 Difference]: With dead ends: 445 [2021-11-25 19:16:15,231 INFO L226 Difference]: Without dead ends: 258 [2021-11-25 19:16:15,233 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:16:15,235 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 90 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:15,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 232 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:16:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-25 19:16:15,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2021-11-25 19:16:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 165 states have (on average 1.2363636363636363) internal successors, (204), 170 states have internal predecessors, (204), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-25 19:16:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 310 transitions. [2021-11-25 19:16:15,275 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 310 transitions. Word has length 11 [2021-11-25 19:16:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:15,275 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 310 transitions. [2021-11-25 19:16:15,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 19:16:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 310 transitions. [2021-11-25 19:16:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 19:16:15,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:15,278 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:15,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:16:15,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash 706778540, now seen corresponding path program 1 times [2021-11-25 19:16:15,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087213317] [2021-11-25 19:16:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:15,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:16:15,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:15,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087213317] [2021-11-25 19:16:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087213317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:15,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:15,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:16:15,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638909010] [2021-11-25 19:16:15,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:15,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:16:15,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:15,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:16:15,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:15,434 INFO L87 Difference]: Start difference. First operand 252 states and 310 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:16:18,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:18,178 INFO L93 Difference]: Finished difference Result 593 states and 761 transitions. [2021-11-25 19:16:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:16:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-11-25 19:16:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:18,183 INFO L225 Difference]: With dead ends: 593 [2021-11-25 19:16:18,183 INFO L226 Difference]: Without dead ends: 345 [2021-11-25 19:16:18,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:16:18,187 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 63 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:18,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 404 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 138 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:16:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-11-25 19:16:18,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 299. [2021-11-25 19:16:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 212 states have (on average 1.2877358490566038) internal successors, (273), 217 states have internal predecessors, (273), 55 states have call successors, (55), 32 states have call predecessors, (55), 31 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-11-25 19:16:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 379 transitions. [2021-11-25 19:16:18,233 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 379 transitions. Word has length 36 [2021-11-25 19:16:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:18,233 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 379 transitions. [2021-11-25 19:16:18,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 19:16:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 379 transitions. [2021-11-25 19:16:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 19:16:18,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:18,237 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:18,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:16:18,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash -60315615, now seen corresponding path program 1 times [2021-11-25 19:16:18,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:18,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248394026] [2021-11-25 19:16:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:18,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:16:18,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:18,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248394026] [2021-11-25 19:16:18,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248394026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:18,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:18,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:16:18,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062728102] [2021-11-25 19:16:18,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:18,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:16:18,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:16:18,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:18,474 INFO L87 Difference]: Start difference. First operand 299 states and 379 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:16:21,397 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:21,922 INFO L93 Difference]: Finished difference Result 532 states and 678 transitions. [2021-11-25 19:16:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:16:21,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2021-11-25 19:16:21,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:21,927 INFO L225 Difference]: With dead ends: 532 [2021-11-25 19:16:21,927 INFO L226 Difference]: Without dead ends: 312 [2021-11-25 19:16:21,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:16:21,930 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 202 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:21,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 331 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-11-25 19:16:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-25 19:16:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 217. [2021-11-25 19:16:21,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 151 states have (on average 1.271523178807947) internal successors, (192), 155 states have internal predecessors, (192), 42 states have call successors, (42), 24 states have call predecessors, (42), 23 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-25 19:16:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 272 transitions. [2021-11-25 19:16:21,961 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 272 transitions. Word has length 54 [2021-11-25 19:16:21,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:21,962 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 272 transitions. [2021-11-25 19:16:21,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 19:16:21,963 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 272 transitions. [2021-11-25 19:16:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-25 19:16:21,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:21,966 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-25 19:16:21,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:16:21,967 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash 689128074, now seen corresponding path program 1 times [2021-11-25 19:16:21,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746724327] [2021-11-25 19:16:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:21,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:16:22,231 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:22,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746724327] [2021-11-25 19:16:22,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746724327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:22,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:22,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:16:22,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289223836] [2021-11-25 19:16:22,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:22,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:16:22,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:22,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:16:22,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:16:22,235 INFO L87 Difference]: Start difference. First operand 217 states and 272 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:16:25,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:25,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:25,863 INFO L93 Difference]: Finished difference Result 462 states and 587 transitions. [2021-11-25 19:16:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:16:25,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2021-11-25 19:16:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:25,868 INFO L225 Difference]: With dead ends: 462 [2021-11-25 19:16:25,868 INFO L226 Difference]: Without dead ends: 459 [2021-11-25 19:16:25,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:16:25,869 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 285 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:25,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 558 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 295 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-25 19:16:25,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-25 19:16:25,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 400. [2021-11-25 19:16:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 283 states have (on average 1.2791519434628975) internal successors, (362), 289 states have internal predecessors, (362), 73 states have call successors, (73), 44 states have call predecessors, (73), 43 states have return successors, (71), 66 states have call predecessors, (71), 69 states have call successors, (71) [2021-11-25 19:16:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 506 transitions. [2021-11-25 19:16:25,942 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 506 transitions. Word has length 58 [2021-11-25 19:16:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:25,945 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 506 transitions. [2021-11-25 19:16:25,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 19:16:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 506 transitions. [2021-11-25 19:16:25,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 19:16:25,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:25,960 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:16:25,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:16:25,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash -219194294, now seen corresponding path program 1 times [2021-11-25 19:16:25,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:25,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088742634] [2021-11-25 19:16:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:25,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:16:26,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:26,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088742634] [2021-11-25 19:16:26,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088742634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:26,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:26,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:16:26,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968270975] [2021-11-25 19:16:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:26,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:16:26,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:16:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:26,134 INFO L87 Difference]: Start difference. First operand 400 states and 506 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:16:28,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:28,888 INFO L93 Difference]: Finished difference Result 609 states and 764 transitions. [2021-11-25 19:16:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:16:28,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2021-11-25 19:16:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:28,891 INFO L225 Difference]: With dead ends: 609 [2021-11-25 19:16:28,892 INFO L226 Difference]: Without dead ends: 201 [2021-11-25 19:16:28,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:16:28,894 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 37 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:28,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 19:16:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-25 19:16:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-11-25 19:16:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 128 states have (on average 1.2265625) internal successors, (157), 133 states have internal predecessors, (157), 39 states have call successors, (39), 21 states have call predecessors, (39), 20 states have return successors, (36), 33 states have call predecessors, (36), 35 states have call successors, (36) [2021-11-25 19:16:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 232 transitions. [2021-11-25 19:16:28,911 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 232 transitions. Word has length 65 [2021-11-25 19:16:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:28,912 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 232 transitions. [2021-11-25 19:16:28,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:16:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 232 transitions. [2021-11-25 19:16:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 19:16:28,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:28,914 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:28,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:16:28,914 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash 551830915, now seen corresponding path program 1 times [2021-11-25 19:16:28,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:28,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706757387] [2021-11-25 19:16:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:28,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:16:29,276 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:29,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706757387] [2021-11-25 19:16:29,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706757387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:29,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:29,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:16:29,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155360060] [2021-11-25 19:16:29,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:29,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:16:29,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:16:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:16:29,281 INFO L87 Difference]: Start difference. First operand 188 states and 232 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 19:16:31,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:33,055 INFO L93 Difference]: Finished difference Result 331 states and 415 transitions. [2021-11-25 19:16:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:16:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 72 [2021-11-25 19:16:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:33,059 INFO L225 Difference]: With dead ends: 331 [2021-11-25 19:16:33,060 INFO L226 Difference]: Without dead ends: 326 [2021-11-25 19:16:33,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:16:33,064 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 225 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:33,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 476 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 19:16:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-25 19:16:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 308. [2021-11-25 19:16:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 213 states have (on average 1.244131455399061) internal successors, (265), 218 states have internal predecessors, (265), 63 states have call successors, (63), 32 states have call predecessors, (63), 31 states have return successors, (62), 57 states have call predecessors, (62), 59 states have call successors, (62) [2021-11-25 19:16:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 390 transitions. [2021-11-25 19:16:33,111 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 390 transitions. Word has length 72 [2021-11-25 19:16:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:33,114 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 390 transitions. [2021-11-25 19:16:33,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 19:16:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 390 transitions. [2021-11-25 19:16:33,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 19:16:33,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:33,127 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-25 19:16:33,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 19:16:33,128 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:33,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:33,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1295432345, now seen corresponding path program 1 times [2021-11-25 19:16:33,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:33,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757084087] [2021-11-25 19:16:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:33,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:16:33,361 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:33,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757084087] [2021-11-25 19:16:33,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757084087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:33,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:33,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:33,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101796824] [2021-11-25 19:16:33,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:33,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:33,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:33,364 INFO L87 Difference]: Start difference. First operand 308 states and 390 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:16:35,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:35,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:35,861 INFO L93 Difference]: Finished difference Result 556 states and 719 transitions. [2021-11-25 19:16:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:35,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 72 [2021-11-25 19:16:35,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:35,865 INFO L225 Difference]: With dead ends: 556 [2021-11-25 19:16:35,866 INFO L226 Difference]: Without dead ends: 301 [2021-11-25 19:16:35,867 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:16:35,868 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 5 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:35,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 216 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 19:16:35,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-25 19:16:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-11-25 19:16:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 209 states have (on average 1.2344497607655502) internal successors, (258), 213 states have internal predecessors, (258), 62 states have call successors, (62), 31 states have call predecessors, (62), 29 states have return successors, (60), 56 states have call predecessors, (60), 58 states have call successors, (60) [2021-11-25 19:16:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 380 transitions. [2021-11-25 19:16:35,898 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 380 transitions. Word has length 72 [2021-11-25 19:16:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:35,899 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 380 transitions. [2021-11-25 19:16:35,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:16:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 380 transitions. [2021-11-25 19:16:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 19:16:35,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:35,901 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-25 19:16:35,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:16:35,902 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash 472279742, now seen corresponding path program 1 times [2021-11-25 19:16:35,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:35,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594046916] [2021-11-25 19:16:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:35,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:16:36,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:36,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594046916] [2021-11-25 19:16:36,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594046916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:36,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:36,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:16:36,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925666999] [2021-11-25 19:16:36,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:36,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:16:36,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:36,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:16:36,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:36,364 INFO L87 Difference]: Start difference. First operand 301 states and 380 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:16:39,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:39,576 INFO L93 Difference]: Finished difference Result 327 states and 407 transitions. [2021-11-25 19:16:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:16:39,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 74 [2021-11-25 19:16:39,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:39,581 INFO L225 Difference]: With dead ends: 327 [2021-11-25 19:16:39,582 INFO L226 Difference]: Without dead ends: 324 [2021-11-25 19:16:39,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:16:39,583 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 103 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:39,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 312 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:16:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-25 19:16:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 317. [2021-11-25 19:16:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 220 states have (on average 1.2227272727272727) internal successors, (269), 224 states have internal predecessors, (269), 64 states have call successors, (64), 33 states have call predecessors, (64), 32 states have return successors, (62), 59 states have call predecessors, (62), 60 states have call successors, (62) [2021-11-25 19:16:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 395 transitions. [2021-11-25 19:16:39,609 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 395 transitions. Word has length 74 [2021-11-25 19:16:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:39,610 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 395 transitions. [2021-11-25 19:16:39,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 19:16:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 395 transitions. [2021-11-25 19:16:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 19:16:39,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:39,612 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-25 19:16:39,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:16:39,612 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1755648404, now seen corresponding path program 1 times [2021-11-25 19:16:39,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:39,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274718086] [2021-11-25 19:16:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:39,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:16:39,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:39,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274718086] [2021-11-25 19:16:39,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274718086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:39,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:39,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:16:39,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511448368] [2021-11-25 19:16:39,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:39,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:16:39,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:39,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:16:39,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:16:39,897 INFO L87 Difference]: Start difference. First operand 317 states and 395 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:16:43,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:43,784 INFO L93 Difference]: Finished difference Result 330 states and 408 transitions. [2021-11-25 19:16:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:16:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 75 [2021-11-25 19:16:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:43,788 INFO L225 Difference]: With dead ends: 330 [2021-11-25 19:16:43,788 INFO L226 Difference]: Without dead ends: 303 [2021-11-25 19:16:43,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:16:43,790 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 122 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 79 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:43,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 266 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 329 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 19:16:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-25 19:16:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 294. [2021-11-25 19:16:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 203 states have (on average 1.2364532019704433) internal successors, (251), 207 states have internal predecessors, (251), 61 states have call successors, (61), 30 states have call predecessors, (61), 29 states have return successors, (59), 56 states have call predecessors, (59), 57 states have call successors, (59) [2021-11-25 19:16:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 371 transitions. [2021-11-25 19:16:43,821 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 371 transitions. Word has length 75 [2021-11-25 19:16:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:43,821 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 371 transitions. [2021-11-25 19:16:43,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-25 19:16:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 371 transitions. [2021-11-25 19:16:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 19:16:43,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:43,824 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:43,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:16:43,824 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:43,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 335550497, now seen corresponding path program 1 times [2021-11-25 19:16:43,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:43,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961304174] [2021-11-25 19:16:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:43,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:16:44,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:44,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961304174] [2021-11-25 19:16:44,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961304174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:44,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:44,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:16:44,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788328113] [2021-11-25 19:16:44,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:44,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:16:44,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:16:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:16:44,033 INFO L87 Difference]: Start difference. First operand 294 states and 371 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 19:16:46,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:46,953 INFO L93 Difference]: Finished difference Result 454 states and 572 transitions. [2021-11-25 19:16:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:16:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 81 [2021-11-25 19:16:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:46,957 INFO L225 Difference]: With dead ends: 454 [2021-11-25 19:16:46,958 INFO L226 Difference]: Without dead ends: 439 [2021-11-25 19:16:46,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:46,960 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 166 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:46,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 342 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:16:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-25 19:16:46,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 345. [2021-11-25 19:16:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 242 states have (on average 1.21900826446281) internal successors, (295), 246 states have internal predecessors, (295), 63 states have call successors, (63), 40 states have call predecessors, (63), 39 states have return successors, (61), 58 states have call predecessors, (61), 59 states have call successors, (61) [2021-11-25 19:16:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 419 transitions. [2021-11-25 19:16:46,998 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 419 transitions. Word has length 81 [2021-11-25 19:16:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:46,999 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 419 transitions. [2021-11-25 19:16:46,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 19:16:47,000 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 419 transitions. [2021-11-25 19:16:47,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-25 19:16:47,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:47,001 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:47,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:16:47,002 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1213732417, now seen corresponding path program 1 times [2021-11-25 19:16:47,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:47,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898052419] [2021-11-25 19:16:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:47,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:16:47,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:47,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898052419] [2021-11-25 19:16:47,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898052419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:47,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:47,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:16:47,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867505177] [2021-11-25 19:16:47,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:47,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:16:47,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:16:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:16:47,239 INFO L87 Difference]: Start difference. First operand 345 states and 419 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 19:16:50,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:50,083 INFO L93 Difference]: Finished difference Result 608 states and 749 transitions. [2021-11-25 19:16:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:16:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 81 [2021-11-25 19:16:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:50,087 INFO L225 Difference]: With dead ends: 608 [2021-11-25 19:16:50,087 INFO L226 Difference]: Without dead ends: 309 [2021-11-25 19:16:50,088 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:16:50,089 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 5 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:50,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 214 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:16:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-25 19:16:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-11-25 19:16:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 214 states have (on average 1.205607476635514) internal successors, (258), 218 states have internal predecessors, (258), 59 states have call successors, (59), 38 states have call predecessors, (59), 35 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-25 19:16:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 372 transitions. [2021-11-25 19:16:50,119 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 372 transitions. Word has length 81 [2021-11-25 19:16:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:50,120 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 372 transitions. [2021-11-25 19:16:50,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 19:16:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 372 transitions. [2021-11-25 19:16:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 19:16:50,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:50,122 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-25 19:16:50,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:16:50,122 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash 406354068, now seen corresponding path program 1 times [2021-11-25 19:16:50,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:50,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903933060] [2021-11-25 19:16:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:50,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:16:50,321 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:50,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903933060] [2021-11-25 19:16:50,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903933060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:16:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319264044] [2021-11-25 19:16:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:50,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:16:50,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:16:50,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:16:50,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:16:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:51,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1856 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:16:51,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:16:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:16:51,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:16:51,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319264044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:51,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:16:51,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-25 19:16:51,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581889796] [2021-11-25 19:16:51,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:51,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:16:51,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:16:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:51,391 INFO L87 Difference]: Start difference. First operand 309 states and 372 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:16:54,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:54,183 INFO L93 Difference]: Finished difference Result 525 states and 637 transitions. [2021-11-25 19:16:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:16:54,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 84 [2021-11-25 19:16:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:54,186 INFO L225 Difference]: With dead ends: 525 [2021-11-25 19:16:54,186 INFO L226 Difference]: Without dead ends: 246 [2021-11-25 19:16:54,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:16:54,188 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 43 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:54,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 194 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 19:16:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-25 19:16:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-11-25 19:16:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 169 states have internal predecessors, (189), 49 states have call successors, (49), 33 states have call predecessors, (49), 30 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-11-25 19:16:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 283 transitions. [2021-11-25 19:16:54,210 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 283 transitions. Word has length 84 [2021-11-25 19:16:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:54,211 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 283 transitions. [2021-11-25 19:16:54,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-25 19:16:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 283 transitions. [2021-11-25 19:16:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 19:16:54,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:54,213 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:54,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:16:54,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:16:54,438 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:54,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1043357030, now seen corresponding path program 1 times [2021-11-25 19:16:54,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:54,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496021689] [2021-11-25 19:16:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:54,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:16:54,705 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:54,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496021689] [2021-11-25 19:16:54,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496021689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:54,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:54,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:16:54,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546411059] [2021-11-25 19:16:54,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:54,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:16:54,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:16:54,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:16:54,708 INFO L87 Difference]: Start difference. First operand 246 states and 283 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 19:16:57,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:16:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:16:58,581 INFO L93 Difference]: Finished difference Result 270 states and 308 transitions. [2021-11-25 19:16:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:16:58,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 83 [2021-11-25 19:16:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:16:58,585 INFO L225 Difference]: With dead ends: 270 [2021-11-25 19:16:58,585 INFO L226 Difference]: Without dead ends: 267 [2021-11-25 19:16:58,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:16:58,587 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 97 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:16:58,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 522 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 19:16:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-25 19:16:58,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2021-11-25 19:16:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 183 states have (on average 1.1256830601092895) internal successors, (206), 186 states have internal predecessors, (206), 51 states have call successors, (51), 35 states have call predecessors, (51), 32 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-25 19:16:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 304 transitions. [2021-11-25 19:16:58,612 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 304 transitions. Word has length 83 [2021-11-25 19:16:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:16:58,613 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 304 transitions. [2021-11-25 19:16:58,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 19:16:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 304 transitions. [2021-11-25 19:16:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 19:16:58,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:16:58,615 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:16:58,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:16:58,616 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:16:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:16:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2059446990, now seen corresponding path program 1 times [2021-11-25 19:16:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:16:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840795410] [2021-11-25 19:16:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:16:58,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:16:59,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:16:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:16:59,520 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:16:59,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840795410] [2021-11-25 19:16:59,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840795410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:16:59,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:16:59,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:16:59,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388094668] [2021-11-25 19:16:59,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:16:59,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:16:59,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:16:59,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:16:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:16:59,526 INFO L87 Difference]: Start difference. First operand 267 states and 304 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 19:17:03,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:03,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:03,521 INFO L93 Difference]: Finished difference Result 467 states and 534 transitions. [2021-11-25 19:17:03,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:17:03,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 99 [2021-11-25 19:17:03,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:03,524 INFO L225 Difference]: With dead ends: 467 [2021-11-25 19:17:03,525 INFO L226 Difference]: Without dead ends: 321 [2021-11-25 19:17:03,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:17:03,526 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 207 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 75 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:03,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 249 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 334 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-25 19:17:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-25 19:17:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 317. [2021-11-25 19:17:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 219 states have (on average 1.1232876712328768) internal successors, (246), 222 states have internal predecessors, (246), 58 states have call successors, (58), 43 states have call predecessors, (58), 39 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2021-11-25 19:17:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 357 transitions. [2021-11-25 19:17:03,552 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 357 transitions. Word has length 99 [2021-11-25 19:17:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:03,553 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 357 transitions. [2021-11-25 19:17:03,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 19:17:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 357 transitions. [2021-11-25 19:17:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 19:17:03,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:03,555 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:03,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 19:17:03,555 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -581774460, now seen corresponding path program 1 times [2021-11-25 19:17:03,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123305347] [2021-11-25 19:17:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:03,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 19:17:04,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:17:04,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123305347] [2021-11-25 19:17:04,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123305347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:17:04,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:17:04,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:17:04,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76159298] [2021-11-25 19:17:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:17:04,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:17:04,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:17:04,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:17:04,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:17:04,242 INFO L87 Difference]: Start difference. First operand 317 states and 357 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 19:17:07,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:08,059 INFO L93 Difference]: Finished difference Result 341 states and 378 transitions. [2021-11-25 19:17:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:17:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 100 [2021-11-25 19:17:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:08,062 INFO L225 Difference]: With dead ends: 341 [2021-11-25 19:17:08,063 INFO L226 Difference]: Without dead ends: 326 [2021-11-25 19:17:08,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:17:08,064 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 181 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:08,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 258 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 348 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-25 19:17:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-25 19:17:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 323. [2021-11-25 19:17:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 221 states have (on average 1.0995475113122173) internal successors, (243), 224 states have internal predecessors, (243), 59 states have call successors, (59), 46 states have call predecessors, (59), 42 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-25 19:17:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 356 transitions. [2021-11-25 19:17:08,099 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 356 transitions. Word has length 100 [2021-11-25 19:17:08,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:08,100 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 356 transitions. [2021-11-25 19:17:08,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 4 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 19:17:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 356 transitions. [2021-11-25 19:17:08,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:17:08,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:08,104 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:08,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:17:08,105 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1719766283, now seen corresponding path program 1 times [2021-11-25 19:17:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254838670] [2021-11-25 19:17:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:08,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 19:17:08,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:17:08,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254838670] [2021-11-25 19:17:08,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254838670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:17:08,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:17:08,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:17:08,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111950829] [2021-11-25 19:17:08,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:17:08,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:17:08,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:17:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:17:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:17:08,868 INFO L87 Difference]: Start difference. First operand 323 states and 356 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 19:17:12,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:17:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:17:12,593 INFO L93 Difference]: Finished difference Result 330 states and 360 transitions. [2021-11-25 19:17:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:17:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 122 [2021-11-25 19:17:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:17:12,596 INFO L225 Difference]: With dead ends: 330 [2021-11-25 19:17:12,596 INFO L226 Difference]: Without dead ends: 269 [2021-11-25 19:17:12,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:17:12,598 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 36 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:17:12,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 378 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-11-25 19:17:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-25 19:17:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 267. [2021-11-25 19:17:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 179 states have (on average 1.094972067039106) internal successors, (196), 182 states have internal predecessors, (196), 51 states have call successors, (51), 39 states have call predecessors, (51), 36 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-25 19:17:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 293 transitions. [2021-11-25 19:17:12,625 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 293 transitions. Word has length 122 [2021-11-25 19:17:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:17:12,625 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 293 transitions. [2021-11-25 19:17:12,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-25 19:17:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 293 transitions. [2021-11-25 19:17:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-25 19:17:12,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:17:12,629 INFO L514 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:17:12,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 19:17:12,630 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:17:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:17:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1275315036, now seen corresponding path program 1 times [2021-11-25 19:17:12,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:17:12,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716643454] [2021-11-25 19:17:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:12,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:17:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-25 19:17:13,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:17:13,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716643454] [2021-11-25 19:17:13,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716643454] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:17:13,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150694187] [2021-11-25 19:17:13,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:17:13,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:17:13,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:17:13,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:17:13,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_443c85a3-fa42-4e79-86ed-54b9e16306e8/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:17:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:17:14,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 2399 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 19:17:14,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:17:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-25 19:17:15,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:17:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-25 19:17:16,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150694187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:17:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282701016] [2021-11-25 19:17:16,635 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2021-11-25 19:17:16,635 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:17:16,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:17:16,649 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:17:16,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:17:18,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1608 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 266 [2021-11-25 19:17:18,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1452 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 241 [2021-11-25 19:17:18,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 636 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 156 [2021-11-25 19:17:18,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 121 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 61 [2021-11-25 19:17:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1055 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 201 [2021-11-25 19:17:25,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:17:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:17:43,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:17:43,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:17:57,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:17:57,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:17:58,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:17:58,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 19:17:58,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:17:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:18:10,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:18:11,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:18:22,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:18:22,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 19:18:23,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:18:23,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 19:18:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:18:23,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:18:23,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:18:23,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 19:18:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:26,903 INFO L244 Elim1Store]: Index analysis took 1190 ms [2021-11-25 19:18:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:27,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:27,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:18:27,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:27,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:27,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:27,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:18:27,387 INFO L190 IndexEqualityManager]: detected not equals via solver