./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 d48e7f91c207323ca4789c990d64e958c1524faa33e5de2c1f0c6fd7803f4f2e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:51:43,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:51:43,364 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:51:43,379 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:51:43,380 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:51:43,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:51:43,422 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:51:43,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:51:43,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:51:43,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:51:43,432 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:51:43,434 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:51:43,434 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:51:43,436 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:51:43,437 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:51:43,437 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:51:43,438 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:51:43,438 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:51:43,439 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:51:43,439 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:51:43,440 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:51:43,441 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:51:43,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:51:43,442 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:51:43,443 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:51:43,443 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:51:43,444 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:51:43,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:51:43,445 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:51:43,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:51:43,447 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:51:43,447 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:51:43,447 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:51:43,448 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:51:43,448 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:51:43,448 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:51:43,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:51:43,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:51:43,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:51:43,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:51:43,450 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:51:43,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:51:43,451 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:51:43,451 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:51:43,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:51:43,452 INFO L153 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_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d48e7f91c207323ca4789c990d64e958c1524faa33e5de2c1f0c6fd7803f4f2e [2023-11-19 04:51:43,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:51:43,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:51:43,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:51:43,810 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:51:43,811 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:51:43,813 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i [2023-11-19 04:51:46,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:51:47,097 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:51:47,098 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i [2023-11-19 04:51:47,106 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/data/ec960585e/5d04a4b62d6d4712839b550847a9573b/FLAG4f7e56de0 [2023-11-19 04:51:47,124 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/data/ec960585e/5d04a4b62d6d4712839b550847a9573b [2023-11-19 04:51:47,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:51:47,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:51:47,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:51:47,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:51:47,143 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:51:47,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad6e310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47, skipping insertion in model container [2023-11-19 04:51:47,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,169 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:51:47,347 WARN L240 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_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i[999,1012] [2023-11-19 04:51:47,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:51:47,380 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:51:47,394 WARN L240 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_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_cond_init.i[999,1012] [2023-11-19 04:51:47,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:51:47,417 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:51:47,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47 WrapperNode [2023-11-19 04:51:47,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:51:47,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:51:47,419 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:51:47,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:51:47,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,457 INFO L138 Inliner]: procedures = 20, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2023-11-19 04:51:47,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:51:47,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:51:47,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:51:47,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:51:47,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,469 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,469 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,479 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,482 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:51:47,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:51:47,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:51:47,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:51:47,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (1/1) ... [2023-11-19 04:51:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:51:47,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:47,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:51:47,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:51:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:51:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:51:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:51:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:51:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:51:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:51:47,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:51:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:51:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:51:47,734 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:51:47,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:51:47,991 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:51:48,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:51:48,077 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:51:48,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:48 BoogieIcfgContainer [2023-11-19 04:51:48,082 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:51:48,085 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:51:48,085 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:51:48,093 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:51:48,093 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:51:47" (1/3) ... [2023-11-19 04:51:48,094 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a07d424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:48, skipping insertion in model container [2023-11-19 04:51:48,094 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:51:47" (2/3) ... [2023-11-19 04:51:48,095 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a07d424 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:51:48, skipping insertion in model container [2023-11-19 04:51:48,095 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:51:48" (3/3) ... [2023-11-19 04:51:48,098 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_cond_init.i [2023-11-19 04:51:48,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:51:48,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:51:48,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:51:48,192 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@728fa5de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:51:48,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:51:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:48,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 04:51:48,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:48,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 04:51:48,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:48,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1629590262, now seen corresponding path program 1 times [2023-11-19 04:51:48,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:48,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295793056] [2023-11-19 04:51:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:48,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:48,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:48,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295793056] [2023-11-19 04:51:48,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295793056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:51:48,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:51:48,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:51:48,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383017231] [2023-11-19 04:51:48,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:51:48,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:51:48,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:48,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:51:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:51:48,492 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:48,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:48,542 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2023-11-19 04:51:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:51:48,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 04:51:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:48,553 INFO L225 Difference]: With dead ends: 26 [2023-11-19 04:51:48,553 INFO L226 Difference]: Without dead ends: 17 [2023-11-19 04:51:48,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:51:48,560 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:48,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:51:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-19 04:51:48,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2023-11-19 04:51:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2023-11-19 04:51:48,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2023-11-19 04:51:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:48,596 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2023-11-19 04:51:48,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2023-11-19 04:51:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:51:48,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:48,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:48,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:51:48,598 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:48,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:48,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1193992059, now seen corresponding path program 1 times [2023-11-19 04:51:48,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:48,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301268179] [2023-11-19 04:51:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:48,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:48,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:48,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301268179] [2023-11-19 04:51:48,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301268179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:48,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062016247] [2023-11-19 04:51:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:48,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:48,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:48,796 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:48,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:51:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:48,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:51:48,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:49,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:51:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:49,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062016247] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:51:49,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560244074] [2023-11-19 04:51:49,074 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-19 04:51:49,074 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:51:49,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:51:49,084 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:51:49,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:51:50,729 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:51:50,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102#(and (= |ULTIMATE.start_main_~s2~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_#t~mem10#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4)) 1) (= |ULTIMATE.start_main_~s2~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem10#1.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:51:50,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:51:50,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:51:50,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-19 04:51:50,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441316553] [2023-11-19 04:51:50,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:51:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:51:50,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:50,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:51:50,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:51:50,861 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:50,959 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-11-19 04:51:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:51:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 04:51:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:50,963 INFO L225 Difference]: With dead ends: 42 [2023-11-19 04:51:50,963 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 04:51:50,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=47, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:51:50,968 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:50,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:51:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 04:51:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 13. [2023-11-19 04:51:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:50,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-19 04:51:50,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2023-11-19 04:51:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:50,983 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-19 04:51:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:50,986 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-19 04:51:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:51:50,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:50,987 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:51,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:51,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:51,206 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:51,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2019557046, now seen corresponding path program 2 times [2023-11-19 04:51:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:51,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578496076] [2023-11-19 04:51:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:51,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578496076] [2023-11-19 04:51:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578496076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:51,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348584700] [2023-11-19 04:51:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:51:51,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:51,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:51,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:51,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:51:51,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:51:51,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:51:51,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:51:51,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:51,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:51:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348584700] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:51:52,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261105410] [2023-11-19 04:51:52,023 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-19 04:51:52,023 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:51:52,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:51:52,024 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:51:52,024 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:51:52,925 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:51:53,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '244#(and (= |ULTIMATE.start_main_~s2~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_#t~mem10#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4)) 1) (= |ULTIMATE.start_main_~s2~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem10#1.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:51:53,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:51:53,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:51:53,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-19 04:51:53,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048890315] [2023-11-19 04:51:53,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:51:53,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 04:51:53,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 04:51:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:51:53,041 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:53,212 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2023-11-19 04:51:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:51:53,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 04:51:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:53,214 INFO L225 Difference]: With dead ends: 90 [2023-11-19 04:51:53,214 INFO L226 Difference]: Without dead ends: 83 [2023-11-19 04:51:53,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=122, Unknown=0, NotChecked=0, Total=240 [2023-11-19 04:51:53,216 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:53,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 60 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:51:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-19 04:51:53,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 19. [2023-11-19 04:51:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-19 04:51:53,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2023-11-19 04:51:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:53,224 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-19 04:51:53,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-19 04:51:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:51:53,226 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:53,226 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:53,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:53,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:53,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:53,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:53,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1324065706, now seen corresponding path program 3 times [2023-11-19 04:51:53,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:53,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399575266] [2023-11-19 04:51:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:53,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:54,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:54,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399575266] [2023-11-19 04:51:54,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399575266] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:54,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263846197] [2023-11-19 04:51:54,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:51:54,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:54,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:54,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:51:54,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:51:54,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:51:54,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:51:54,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:54,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:51:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:54,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263846197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:51:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1819822291] [2023-11-19 04:51:54,693 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-19 04:51:54,693 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:51:54,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:51:54,694 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:51:54,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:51:55,775 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:51:55,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (= |ULTIMATE.start_main_~s2~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_#t~mem10#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4)) 1) (= |ULTIMATE.start_main_~s2~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem10#1.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:51:55,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:51:55,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:51:55,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-19 04:51:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721084913] [2023-11-19 04:51:55,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:51:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 04:51:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:51:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 04:51:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2023-11-19 04:51:55,880 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:51:56,221 INFO L93 Difference]: Finished difference Result 186 states and 222 transitions. [2023-11-19 04:51:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 04:51:56,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 04:51:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:51:56,224 INFO L225 Difference]: With dead ends: 186 [2023-11-19 04:51:56,224 INFO L226 Difference]: Without dead ends: 179 [2023-11-19 04:51:56,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2023-11-19 04:51:56,226 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 385 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:51:56,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 132 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:51:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-19 04:51:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 31. [2023-11-19 04:51:56,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2023-11-19 04:51:56,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 16 [2023-11-19 04:51:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:51:56,245 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2023-11-19 04:51:56,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:51:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2023-11-19 04:51:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:51:56,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:51:56,251 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-11-19 04:51:56,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:51:56,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:56,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:51:56,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:51:56,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1138167914, now seen corresponding path program 4 times [2023-11-19 04:51:56,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:51:56,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416744743] [2023-11-19 04:51:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:51:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:51:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:58,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:51:58,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416744743] [2023-11-19 04:51:58,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416744743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:51:58,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945395558] [2023-11-19 04:51:58,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:51:58,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:51:58,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:51:58,304 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:51:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:51:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:51:58,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 04:51:58,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:51:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:58,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:51:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:51:59,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945395558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:51:59,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955627218] [2023-11-19 04:51:59,889 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-19 04:51:59,889 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:51:59,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:51:59,889 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:51:59,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:52:00,700 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:52:00,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1008#(and (= |ULTIMATE.start_main_~s2~0#1.offset| (select (select |#memory_$Pointer$.offset| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start_main_#t~mem10#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~s2~0#1.base|) (+ |ULTIMATE.start_main_~s2~0#1.offset| 4)) 1) (= |ULTIMATE.start_main_~s2~0#1.base| (select (select |#memory_$Pointer$.base| |~#a~0.base|) |~#a~0.offset|)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem10#1.base| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s2~0#1.base|) |ULTIMATE.start_main_~s2~0#1.offset|) 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-19 04:52:00,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:52:00,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:52:00,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-11-19 04:52:00,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004413378] [2023-11-19 04:52:00,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:52:00,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-19 04:52:00,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:52:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-19 04:52:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 04:52:00,830 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:52:01,878 INFO L93 Difference]: Finished difference Result 378 states and 450 transitions. [2023-11-19 04:52:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 04:52:01,879 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-19 04:52:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:52:01,888 INFO L225 Difference]: With dead ends: 378 [2023-11-19 04:52:01,888 INFO L226 Difference]: Without dead ends: 371 [2023-11-19 04:52:01,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1324, Invalid=1328, Unknown=0, NotChecked=0, Total=2652 [2023-11-19 04:52:01,894 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1113 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:52:01,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 276 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:52:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2023-11-19 04:52:01,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 55. [2023-11-19 04:52:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2023-11-19 04:52:01,923 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 28 [2023-11-19 04:52:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:52:01,926 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2023-11-19 04:52:01,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:52:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2023-11-19 04:52:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 04:52:01,931 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:52:01,931 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-11-19 04:52:01,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 04:52:02,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:02,146 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:52:02,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:52:02,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2115597846, now seen corresponding path program 5 times [2023-11-19 04:52:02,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:52:02,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511701951] [2023-11-19 04:52:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:52:02,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:52:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:52:07,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:52:07,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:52:07,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511701951] [2023-11-19 04:52:07,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511701951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:52:07,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846969683] [2023-11-19 04:52:07,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:52:07,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:52:07,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:52:07,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:52:07,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cff6fb9d-9c80-485b-9e5a-61f4940dd8d1/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process