./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_queue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_queue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF --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 32bit --witnessprinter.graph.data.programhash 8159433f4ea1208e9ded3d30d98c55f64500f74c12655a237b65d69e94898ea5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:29:19,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:29:19,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:29:19,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:29:19,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:29:19,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:29:19,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:29:19,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:29:19,356 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:29:19,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:29:19,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:29:19,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:29:19,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:29:19,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:29:19,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:29:19,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:29:19,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:29:19,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:29:19,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:29:19,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:29:19,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:29:19,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:29:19,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:29:19,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:29:19,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:29:19,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:29:19,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:29:19,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:29:19,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:29:19,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:29:19,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:29:19,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:29:19,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:29:19,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:29:19,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:29:19,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:29:19,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:29:19,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:29:19,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:29:19,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:29:19,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:29:19,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:29:19,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:29:19,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:29:19,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:29:19,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:29:19,419 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:29:19,419 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:29:19,420 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:29:19,420 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:29:19,420 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:29:19,420 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:29:19,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:29:19,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:29:19,421 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:29:19,421 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:29:19,421 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:29:19,421 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:29:19,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:29:19,422 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:29:19,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:29:19,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:29:19,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:29:19,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:29:19,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:29:19,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:29:19,423 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:29:19,424 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:29:19,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:29:19,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:29:19,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:29:19,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:29:19,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:29:19,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:29:19,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:29:19,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:29:19,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:29:19,425 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:29:19,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:29:19,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:29:19,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:29:19,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:29:19,426 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_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8159433f4ea1208e9ded3d30d98c55f64500f74c12655a237b65d69e94898ea5 [2021-11-13 02:29:19,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:29:19,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:29:19,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:29:19,727 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:29:19,727 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:29:19,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-pthread/cs_queue-2.i [2021-11-13 02:29:19,830 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/data/3bd2f785b/6463bb7e83f74e0f912f273fe5f24731/FLAG78590ed6c [2021-11-13 02:29:20,433 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:29:20,437 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/sv-benchmarks/c/seq-pthread/cs_queue-2.i [2021-11-13 02:29:20,459 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/data/3bd2f785b/6463bb7e83f74e0f912f273fe5f24731/FLAG78590ed6c [2021-11-13 02:29:20,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/data/3bd2f785b/6463bb7e83f74e0f912f273fe5f24731 [2021-11-13 02:29:20,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:29:20,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:29:20,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:29:20,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:29:20,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:29:20,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:29:20" (1/1) ... [2021-11-13 02:29:20,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51f6fdc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:20, skipping insertion in model container [2021-11-13 02:29:20,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:29:20" (1/1) ... [2021-11-13 02:29:20,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:29:20,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:29:21,373 WARN L228 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_66e92c66-8f91-4b52-b26d-3cb34007b13f/sv-benchmarks/c/seq-pthread/cs_queue-2.i[34556,34569] [2021-11-13 02:29:21,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:29:21,589 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:29:21,619 WARN L228 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_66e92c66-8f91-4b52-b26d-3cb34007b13f/sv-benchmarks/c/seq-pthread/cs_queue-2.i[34556,34569] [2021-11-13 02:29:21,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:29:21,747 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:29:21,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21 WrapperNode [2021-11-13 02:29:21,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:29:21,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:29:21,749 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:29:21,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:29:21,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:29:21,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:29:21,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:29:21,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:29:21,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,874 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:29:21,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:29:21,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:29:21,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:29:21,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (1/1) ... [2021-11-13 02:29:21,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:29:21,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:22,011 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:29:22,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66e92c66-8f91-4b52-b26d-3cb34007b13f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:29:22,061 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 02:29:22,063 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 02:29:22,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:29:22,068 INFO L130 BoogieDeclarations]: Found specification of procedure empty [2021-11-13 02:29:22,069 INFO L138 BoogieDeclarations]: Found implementation of procedure empty [2021-11-13 02:29:22,069 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_lock [2021-11-13 02:29:22,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_lock [2021-11-13 02:29:22,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:29:22,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:29:22,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:29:22,070 INFO L130 BoogieDeclarations]: Found specification of procedure enqueue [2021-11-13 02:29:22,070 INFO L138 BoogieDeclarations]: Found implementation of procedure enqueue [2021-11-13 02:29:22,070 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_mutex_unlock [2021-11-13 02:29:22,070 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_mutex_unlock [2021-11-13 02:29:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 02:29:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 02:29:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:29:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2021-11-13 02:29:22,071 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2021-11-13 02:29:22,071 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_join [2021-11-13 02:29:22,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_join [2021-11-13 02:29:22,072 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-13 02:29:22,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2021-11-13 02:29:22,072 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2021-11-13 02:29:22,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2021-11-13 02:29:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:29:22,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:29:22,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:29:22,414 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:22,415 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:22,415 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2021-11-13 02:29:22,415 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2021-11-13 02:29:22,524 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:22,525 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume 0 != ~__CS_ret~0 % 256;#res := 0; [2021-11-13 02:29:23,022 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1097: SUMMARY for call __CS_cs(); srcloc: null [2021-11-13 02:29:23,023 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1097-1: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2021-11-13 02:29:23,023 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1097-1: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,023 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1132: SUMMARY for call __CS_cs(); srcloc: null [2021-11-13 02:29:23,023 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1132-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-11-13 02:29:23,023 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1132-1: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,023 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1075: SUMMARY for call __CS_cs(); srcloc: null [2021-11-13 02:29:23,023 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1075-1: assume 0 != ~__CS_ret~0 % 256;t1_#res#1.base, t1_#res#1.offset := 0, 0; [2021-11-13 02:29:23,024 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L1075-1: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,024 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##87: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,024 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##86: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2021-11-13 02:29:23,024 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,024 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2021-11-13 02:29:23,025 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##79: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,025 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##78: assume 0 != ~__CS_ret~0 % 256;dequeue_#res#1 := 0; [2021-11-13 02:29:23,026 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,026 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume 0 != ~__CS_ret~0 % 256;t1_#res#1.base, t1_#res#1.offset := 0, 0; [2021-11-13 02:29:23,026 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,055 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-11-13 02:29:23,056 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,056 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2021-11-13 02:29:23,056 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##166: assume 0 != ~__CS_ret~0 % 256;t1_#res#1.base, t1_#res#1.offset := 0, 0; [2021-11-13 02:29:23,056 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##169: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,057 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##168: assume 0 != ~__CS_ret~0 % 256;t1_#res#1.base, t1_#res#1.offset := 0, 0; [2021-11-13 02:29:23,057 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##167: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,057 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##104: assume 0 != ~__CS_ret~0 % 256;t2_#res#1.base, t2_#res#1.offset := 0, 0; [2021-11-13 02:29:23,058 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##105: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,058 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##118: assume !(0 != ~__CS_ret~0 % 256); [2021-11-13 02:29:23,058 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##117: assume 0 != ~__CS_ret~0 % 256;t1_#res#1.base, t1_#res#1.offset := 0, 0; [2021-11-13 02:29:28,053 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:29:28,053 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:29:28,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:29:28 BoogieIcfgContainer [2021-11-13 02:29:28,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:29:28,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:29:28,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:29:28,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:29:28,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:29:20" (1/3) ... [2021-11-13 02:29:28,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce4788c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:29:28, skipping insertion in model container [2021-11-13 02:29:28,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:29:21" (2/3) ... [2021-11-13 02:29:28,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce4788c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:29:28, skipping insertion in model container [2021-11-13 02:29:28,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:29:28" (3/3) ... [2021-11-13 02:29:28,068 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_queue-2.i [2021-11-13 02:29:28,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:29:28,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:29:28,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:29:28,145 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 [2021-11-13 02:29:28,145 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:29:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 328 states, 181 states have (on average 1.419889502762431) internal successors, (257), 183 states have internal predecessors, (257), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-11-13 02:29:28,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-13 02:29:28,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:28,210 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:28,211 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:28,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1295930983, now seen corresponding path program 1 times [2021-11-13 02:29:28,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:28,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532416930] [2021-11-13 02:29:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:28,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2021-11-13 02:29:29,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:29,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532416930] [2021-11-13 02:29:29,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532416930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:29,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:29,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:29:29,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055477191] [2021-11-13 02:29:29,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:29,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:29,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:29,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:29,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:29,216 INFO L87 Difference]: Start difference. First operand has 328 states, 181 states have (on average 1.419889502762431) internal successors, (257), 183 states have internal predecessors, (257), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2021-11-13 02:29:31,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:31,791 INFO L93 Difference]: Finished difference Result 935 states and 1513 transitions. [2021-11-13 02:29:31,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:29:31,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) Word has length 217 [2021-11-13 02:29:31,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:31,816 INFO L225 Difference]: With dead ends: 935 [2021-11-13 02:29:31,816 INFO L226 Difference]: Without dead ends: 499 [2021-11-13 02:29:31,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:29:31,827 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 342 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2284.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2419.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:31,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 1744 Invalid, 86 Unknown, 0 Unchecked, 19.89ms Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 1 Unknown, 0 Unchecked, 2419.01ms Time] [2021-11-13 02:29:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-13 02:29:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 494. [2021-11-13 02:29:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 277 states have (on average 1.4693140794223827) internal successors, (407), 280 states have internal predecessors, (407), 199 states have call successors, (199), 17 states have call predecessors, (199), 17 states have return successors, (203), 198 states have call predecessors, (203), 199 states have call successors, (203) [2021-11-13 02:29:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 809 transitions. [2021-11-13 02:29:32,040 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 809 transitions. Word has length 217 [2021-11-13 02:29:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:32,042 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 809 transitions. [2021-11-13 02:29:32,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 1 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 1 states have call predecessors, (52), 1 states have call successors, (52) [2021-11-13 02:29:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 809 transitions. [2021-11-13 02:29:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-13 02:29:32,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:32,066 INFO L514 BasicCegarLoop]: trace histogram [57, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:32,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:29:32,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:32,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash -498646325, now seen corresponding path program 1 times [2021-11-13 02:29:32,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:32,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931523727] [2021-11-13 02:29:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:32,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3232 trivial. 0 not checked. [2021-11-13 02:29:32,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:32,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931523727] [2021-11-13 02:29:32,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931523727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:32,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:32,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:29:32,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612116210] [2021-11-13 02:29:32,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:32,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:32,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:32,430 INFO L87 Difference]: Start difference. First operand 494 states and 809 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) [2021-11-13 02:29:34,459 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:35,236 INFO L93 Difference]: Finished difference Result 1056 states and 1722 transitions. [2021-11-13 02:29:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:29:35,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) Word has length 275 [2021-11-13 02:29:35,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:35,250 INFO L225 Difference]: With dead ends: 1056 [2021-11-13 02:29:35,251 INFO L226 Difference]: Without dead ends: 945 [2021-11-13 02:29:35,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:29:35,254 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 574 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2497.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.94ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2694.72ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:35,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 1558 Invalid, 173 Unknown, 0 Unchecked, 13.94ms Time], IncrementalHoareTripleChecker [60 Valid, 112 Invalid, 1 Unknown, 0 Unchecked, 2694.72ms Time] [2021-11-13 02:29:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-11-13 02:29:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 935. [2021-11-13 02:29:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 522 states have (on average 1.4731800766283525) internal successors, (769), 531 states have internal predecessors, (769), 379 states have call successors, (379), 30 states have call predecessors, (379), 33 states have return successors, (397), 377 states have call predecessors, (397), 379 states have call successors, (397) [2021-11-13 02:29:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1545 transitions. [2021-11-13 02:29:35,374 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1545 transitions. Word has length 275 [2021-11-13 02:29:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:35,378 INFO L470 AbstractCegarLoop]: Abstraction has 935 states and 1545 transitions. [2021-11-13 02:29:35,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) [2021-11-13 02:29:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1545 transitions. [2021-11-13 02:29:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-11-13 02:29:35,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:35,393 INFO L514 BasicCegarLoop]: trace histogram [57, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:35,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:29:35,393 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:35,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1566876637, now seen corresponding path program 1 times [2021-11-13 02:29:35,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:35,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202445516] [2021-11-13 02:29:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:35,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3232 trivial. 0 not checked. [2021-11-13 02:29:35,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:35,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202445516] [2021-11-13 02:29:35,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202445516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:35,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:35,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:29:35,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144885490] [2021-11-13 02:29:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:35,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:35,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:35,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:35,730 INFO L87 Difference]: Start difference. First operand 935 states and 1545 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (61), 1 states have call predecessors, (61), 3 states have return successors, (61), 3 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-13 02:29:37,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:38,205 INFO L93 Difference]: Finished difference Result 1851 states and 3061 transitions. [2021-11-13 02:29:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:29:38,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (61), 1 states have call predecessors, (61), 3 states have return successors, (61), 3 states have call predecessors, (61), 2 states have call successors, (61) Word has length 276 [2021-11-13 02:29:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:38,215 INFO L225 Difference]: With dead ends: 1851 [2021-11-13 02:29:38,216 INFO L226 Difference]: Without dead ends: 927 [2021-11-13 02:29:38,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:38,224 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 0 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2311.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.12ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2391.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:38,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1460 Invalid, 85 Unknown, 0 Unchecked, 7.12ms Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 1 Unknown, 0 Unchecked, 2391.01ms Time] [2021-11-13 02:29:38,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-11-13 02:29:38,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 927. [2021-11-13 02:29:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 518 states have (on average 1.4613899613899615) internal successors, (757), 527 states have internal predecessors, (757), 375 states have call successors, (375), 30 states have call predecessors, (375), 33 states have return successors, (393), 373 states have call predecessors, (393), 375 states have call successors, (393) [2021-11-13 02:29:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1525 transitions. [2021-11-13 02:29:38,317 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1525 transitions. Word has length 276 [2021-11-13 02:29:38,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:38,319 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 1525 transitions. [2021-11-13 02:29:38,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (61), 1 states have call predecessors, (61), 3 states have return successors, (61), 3 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-13 02:29:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1525 transitions. [2021-11-13 02:29:38,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-13 02:29:38,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:38,333 INFO L514 BasicCegarLoop]: trace histogram [57, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:38,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:29:38,333 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:38,335 INFO L85 PathProgramCache]: Analyzing trace with hash 291377217, now seen corresponding path program 1 times [2021-11-13 02:29:38,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:38,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979552761] [2021-11-13 02:29:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:38,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3232 trivial. 0 not checked. [2021-11-13 02:29:38,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:38,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979552761] [2021-11-13 02:29:38,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979552761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:38,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:38,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:29:38,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067071884] [2021-11-13 02:29:38,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:38,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:38,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:38,694 INFO L87 Difference]: Start difference. First operand 927 states and 1525 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) [2021-11-13 02:29:40,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:41,509 INFO L93 Difference]: Finished difference Result 1442 states and 2341 transitions. [2021-11-13 02:29:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:29:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) Word has length 275 [2021-11-13 02:29:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:41,523 INFO L225 Difference]: With dead ends: 1442 [2021-11-13 02:29:41,523 INFO L226 Difference]: Without dead ends: 941 [2021-11-13 02:29:41,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:29:41,529 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 525 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2501.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.84ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2685.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:41,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1615 Invalid, 137 Unknown, 0 Unchecked, 12.84ms Time], IncrementalHoareTripleChecker [33 Valid, 103 Invalid, 1 Unknown, 0 Unchecked, 2685.23ms Time] [2021-11-13 02:29:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-11-13 02:29:41,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 929. [2021-11-13 02:29:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 519 states have (on average 1.4566473988439306) internal successors, (756), 530 states have internal predecessors, (756), 374 states have call successors, (374), 30 states have call predecessors, (374), 35 states have return successors, (392), 372 states have call predecessors, (392), 374 states have call successors, (392) [2021-11-13 02:29:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1522 transitions. [2021-11-13 02:29:41,642 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1522 transitions. Word has length 275 [2021-11-13 02:29:41,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:41,643 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1522 transitions. [2021-11-13 02:29:41,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) [2021-11-13 02:29:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1522 transitions. [2021-11-13 02:29:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-13 02:29:41,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:41,661 INFO L514 BasicCegarLoop]: trace histogram [57, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:41,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:29:41,661 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:41,662 INFO L85 PathProgramCache]: Analyzing trace with hash 800193860, now seen corresponding path program 1 times [2021-11-13 02:29:41,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:41,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980610618] [2021-11-13 02:29:41,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:41,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3232 trivial. 0 not checked. [2021-11-13 02:29:41,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:41,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980610618] [2021-11-13 02:29:41,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980610618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:41,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:41,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:29:41,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432119510] [2021-11-13 02:29:41,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:41,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:41,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:41,906 INFO L87 Difference]: Start difference. First operand 929 states and 1522 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) [2021-11-13 02:29:43,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:45,079 INFO L93 Difference]: Finished difference Result 1853 states and 3022 transitions. [2021-11-13 02:29:45,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:29:45,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) Word has length 275 [2021-11-13 02:29:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:45,091 INFO L225 Difference]: With dead ends: 1853 [2021-11-13 02:29:45,091 INFO L226 Difference]: Without dead ends: 817 [2021-11-13 02:29:45,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:29:45,101 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 608 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 87 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2755.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.23ms SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2972.83ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:45,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 1476 Invalid, 218 Unknown, 0 Unchecked, 15.23ms Time], IncrementalHoareTripleChecker [87 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 2972.83ms Time] [2021-11-13 02:29:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-11-13 02:29:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 811. [2021-11-13 02:29:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 452 states have (on average 1.418141592920354) internal successors, (641), 458 states have internal predecessors, (641), 325 states have call successors, (325), 30 states have call predecessors, (325), 33 states have return successors, (339), 324 states have call predecessors, (339), 325 states have call successors, (339) [2021-11-13 02:29:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1305 transitions. [2021-11-13 02:29:45,205 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1305 transitions. Word has length 275 [2021-11-13 02:29:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:45,206 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1305 transitions. [2021-11-13 02:29:45,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (61), 1 states have call predecessors, (61), 2 states have return successors, (61), 3 states have call predecessors, (61), 4 states have call successors, (61) [2021-11-13 02:29:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1305 transitions. [2021-11-13 02:29:45,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-13 02:29:45,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:45,221 INFO L514 BasicCegarLoop]: trace histogram [60, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:45,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:29:45,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:45,223 INFO L85 PathProgramCache]: Analyzing trace with hash -532446737, now seen corresponding path program 1 times [2021-11-13 02:29:45,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:45,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749693379] [2021-11-13 02:29:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:45,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3652 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3652 trivial. 0 not checked. [2021-11-13 02:29:45,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:45,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749693379] [2021-11-13 02:29:45,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749693379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:29:45,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:29:45,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:29:45,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548964603] [2021-11-13 02:29:45,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:29:45,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:29:45,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:45,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:29:45,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:45,549 INFO L87 Difference]: Start difference. First operand 811 states and 1305 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (65), 1 states have call predecessors, (65), 3 states have return successors, (65), 3 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-13 02:29:47,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:29:48,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:48,018 INFO L93 Difference]: Finished difference Result 1623 states and 2609 transitions. [2021-11-13 02:29:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:29:48,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (65), 1 states have call predecessors, (65), 3 states have return successors, (65), 3 states have call predecessors, (65), 2 states have call successors, (65) Word has length 306 [2021-11-13 02:29:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:48,035 INFO L225 Difference]: With dead ends: 1623 [2021-11-13 02:29:48,035 INFO L226 Difference]: Without dead ends: 827 [2021-11-13 02:29:48,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:29:48,044 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 0 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2319.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.96ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2381.03ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:48,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1466 Invalid, 82 Unknown, 0 Unchecked, 6.96ms Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 1 Unknown, 0 Unchecked, 2381.03ms Time] [2021-11-13 02:29:48,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-11-13 02:29:48,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-11-13 02:29:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 464 states have (on average 1.4073275862068966) internal successors, (653), 470 states have internal predecessors, (653), 325 states have call successors, (325), 30 states have call predecessors, (325), 37 states have return successors, (346), 328 states have call predecessors, (346), 325 states have call successors, (346) [2021-11-13 02:29:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1324 transitions. [2021-11-13 02:29:48,135 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1324 transitions. Word has length 306 [2021-11-13 02:29:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:48,136 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1324 transitions. [2021-11-13 02:29:48,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (65), 1 states have call predecessors, (65), 3 states have return successors, (65), 3 states have call predecessors, (65), 2 states have call successors, (65) [2021-11-13 02:29:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1324 transitions. [2021-11-13 02:29:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-13 02:29:48,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:48,150 INFO L514 BasicCegarLoop]: trace histogram [62, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:29:48,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:29:48,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:29:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1639681461, now seen corresponding path program 1 times [2021-11-13 02:29:48,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:48,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321489048] [2021-11-13 02:29:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:48,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat