./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --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_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/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_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/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_bd5b2485-50a0-4167-9587-6fd34c6f3f77/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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:09:45,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:09:45,302 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:09:45,308 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:09:45,308 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:09:45,336 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:09:45,337 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:09:45,337 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:09:45,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:09:45,339 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:09:45,339 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:09:45,340 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:09:45,341 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:09:45,341 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:09:45,342 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:09:45,342 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:09:45,343 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:09:45,343 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:09:45,344 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:09:45,345 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:09:45,345 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:09:45,346 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:09:45,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:09:45,347 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:09:45,347 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:09:45,348 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:09:45,348 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:09:45,349 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:09:45,349 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:09:45,350 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:09:45,350 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:09:45,351 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:09:45,351 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:09:45,351 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:09:45,352 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:09:45,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:09:45,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:09:45,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:09:45,353 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:09:45,353 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:09:45,354 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:09:45,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:09:45,354 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:09:45,355 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:09:45,355 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:09:45,355 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_bd5b2485-50a0-4167-9587-6fd34c6f3f77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2023-11-19 04:09:45,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:09:45,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:09:45,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:09:45,600 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:09:45,601 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:09:45,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-11-19 04:09:48,743 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:09:48,993 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:09:48,994 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2023-11-19 04:09:49,009 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/data/4d578603c/961901ae961d49ba8ae7fb298bd4e219/FLAGd9cecb0f8 [2023-11-19 04:09:49,022 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/data/4d578603c/961901ae961d49ba8ae7fb298bd4e219 [2023-11-19 04:09:49,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:09:49,026 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:09:49,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:09:49,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:09:49,033 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:09:49,034 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,036 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e975a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49, skipping insertion in model container [2023-11-19 04:09:49,036 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,057 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:09:49,198 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_bd5b2485-50a0-4167-9587-6fd34c6f3f77/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2023-11-19 04:09:49,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:09:49,224 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:09:49,237 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_bd5b2485-50a0-4167-9587-6fd34c6f3f77/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2023-11-19 04:09:49,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:09:49,258 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:09:49,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49 WrapperNode [2023-11-19 04:09:49,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:09:49,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:09:49,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:09:49,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:09:49,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,290 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-19 04:09:49,290 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:09:49,291 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:09:49,291 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:09:49,291 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:09:49,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,308 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,309 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,314 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,318 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,319 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,320 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:09:49,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:09:49,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:09:49,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:09:49,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (1/1) ... [2023-11-19 04:09:49,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:09:49,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:09:49,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:09:49,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:09:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:09:49,393 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:09:49,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:09:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:09:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:09:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:09:49,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:09:49,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:09:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:09:49,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:09:49,457 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:09:49,459 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:09:49,612 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:09:49,653 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:09:49,654 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 04:09:49,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:49 BoogieIcfgContainer [2023-11-19 04:09:49,661 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:09:49,663 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:09:49,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:09:49,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:09:49,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:09:49" (1/3) ... [2023-11-19 04:09:49,668 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad0e09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:49, skipping insertion in model container [2023-11-19 04:09:49,668 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:09:49" (2/3) ... [2023-11-19 04:09:49,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad0e09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:09:49, skipping insertion in model container [2023-11-19 04:09:49,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:09:49" (3/3) ... [2023-11-19 04:09:49,670 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2023-11-19 04:09:49,699 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:09:49,699 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:09:49,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:09:49,760 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;@242b1b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:09:49,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:09:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:09:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:09:49,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:09:49,773 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:09:49,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:09:49,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:09:49,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1661147299, now seen corresponding path program 1 times [2023-11-19 04:09:49,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:09:49,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804125413] [2023-11-19 04:09:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:09:49,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:09:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:09:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:09:50,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:09:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804125413] [2023-11-19 04:09:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804125413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:09:50,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:09:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:09:50,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978122833] [2023-11-19 04:09:50,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:09:50,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:09:50,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:09:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:09:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:09:50,247 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:09:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:09:50,302 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2023-11-19 04:09:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:09:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-19 04:09:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:09:50,312 INFO L225 Difference]: With dead ends: 31 [2023-11-19 04:09:50,312 INFO L226 Difference]: Without dead ends: 23 [2023-11-19 04:09:50,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:09:50,323 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:09:50,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:09:50,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-19 04:09:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2023-11-19 04:09:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:09:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-11-19 04:09:50,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2023-11-19 04:09:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:09:50,381 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-11-19 04:09:50,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 04:09:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-11-19 04:09:50,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:09:50,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:09:50,384 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:09:50,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:09:50,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:09:50,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:09:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -278262779, now seen corresponding path program 1 times [2023-11-19 04:09:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:09:50,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553757851] [2023-11-19 04:09:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:09:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:09:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:09:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:09:51,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:09:51,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553757851] [2023-11-19 04:09:51,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553757851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:09:51,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135003896] [2023-11-19 04:09:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:09:51,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:09:51,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:09:51,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:09:51,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:09:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:09:51,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 04:09:51,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:09:51,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 04:09:51,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-19 04:09:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:09:51,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:09:51,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-19 04:09:51,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 04:09:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:09:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135003896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:09:51,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184353088] [2023-11-19 04:09:51,858 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:09:51,858 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:09:51,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:09:51,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:09:51,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:09:52,993 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:09:52,995 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:09:53,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '207#(and (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| 99999) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~j~0#1| 9999) (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_43|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|))) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem9#1|) (<= |ULTIMATE.start_main_#t~mem9#1| 2) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2023-11-19 04:09:53,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:09:53,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:09:53,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 17 [2023-11-19 04:09:53,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638049247] [2023-11-19 04:09:53,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:09:53,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 04:09:53,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:09:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 04:09:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-11-19 04:09:53,898 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 04:09:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:09:54,174 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2023-11-19 04:09:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 04:09:54,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2023-11-19 04:09:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:09:54,175 INFO L225 Difference]: With dead ends: 36 [2023-11-19 04:09:54,175 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 04:09:54,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2023-11-19 04:09:54,178 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:09:54,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 88 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:09:54,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 04:09:54,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2023-11-19 04:09:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 04:09:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-19 04:09:54,186 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2023-11-19 04:09:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:09:54,187 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-19 04:09:54,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 13 states have internal predecessors, (20), 4 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 04:09:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-19 04:09:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 04:09:54,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:09:54,188 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:09:54,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:09:54,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:09:54,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:09:54,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:09:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash -434026686, now seen corresponding path program 1 times [2023-11-19 04:09:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:09:54,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661579639] [2023-11-19 04:09:54,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:09:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:09:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:09:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:09:54,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:09:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661579639] [2023-11-19 04:09:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661579639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:09:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48622306] [2023-11-19 04:09:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:09:54,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:09:54,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:09:54,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:09:54,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:09:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:09:54,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:09:54,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:09:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:09:54,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:09:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:09:54,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48622306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:09:54,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2022368616] [2023-11-19 04:09:54,661 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:09:54,661 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:09:54,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:09:54,662 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:09:54,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:09:55,662 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:09:55,664 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:09:56,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '440#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_#t~mem9#1| (+ |ULTIMATE.start_main_~i~0#1| 1)))' at error location [2023-11-19 04:09:56,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:09:56,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:09:56,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-19 04:09:56,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284583064] [2023-11-19 04:09:56,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:09:56,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:09:56,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:09:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:09:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:09:56,287 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:09:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:09:56,356 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-11-19 04:09:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:09:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-11-19 04:09:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:09:56,359 INFO L225 Difference]: With dead ends: 40 [2023-11-19 04:09:56,360 INFO L226 Difference]: Without dead ends: 31 [2023-11-19 04:09:56,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2023-11-19 04:09:56,363 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:09:56,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:09:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-19 04:09:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2023-11-19 04:09:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 04:09:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-19 04:09:56,378 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 21 [2023-11-19 04:09:56,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:09:56,379 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-19 04:09:56,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 04:09:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-19 04:09:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:09:56,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:09:56,381 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:09:56,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:09:56,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:09:56,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:09:56,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:09:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2086803997, now seen corresponding path program 2 times [2023-11-19 04:09:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:09:56,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253548514] [2023-11-19 04:09:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:09:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:09:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:09:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:09:57,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:09:57,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253548514] [2023-11-19 04:09:57,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253548514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:09:57,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988980506] [2023-11-19 04:09:57,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:09:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:09:57,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:09:57,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:09:57,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:09:57,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 04:09:57,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:09:57,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-19 04:09:57,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:09:57,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-19 04:09:57,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2023-11-19 04:09:57,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2023-11-19 04:09:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 04:09:57,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:09:59,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988980506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:09:59,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895173106] [2023-11-19 04:09:59,729 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-19 04:09:59,729 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:09:59,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:09:59,740 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:09:59,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:10:00,530 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:10:00,531 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:10:05,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '644#(and (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 4) |ULTIMATE.start_main_#t~mem9#1|) (<= |ULTIMATE.start_main_#t~mem9#1| 2) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (and (<= |ULTIMATE.start_main_~n~0#1| 99999) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~j~0#1| 9999) (<= |ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_66|) (<= 1 |ULTIMATE.start_main_~j~0#1|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 2 |ULTIMATE.start_main_~n~0#1|))' at error location [2023-11-19 04:10:05,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:10:05,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:10:05,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2023-11-19 04:10:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996440457] [2023-11-19 04:10:05,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:10:05,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 04:10:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 04:10:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=960, Unknown=1, NotChecked=0, Total=1122 [2023-11-19 04:10:05,429 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-19 04:10:10,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:10:22,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:10:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:22,374 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-11-19 04:10:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-19 04:10:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 23 [2023-11-19 04:10:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:22,375 INFO L225 Difference]: With dead ends: 60 [2023-11-19 04:10:22,376 INFO L226 Difference]: Without dead ends: 58 [2023-11-19 04:10:22,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=510, Invalid=2675, Unknown=7, NotChecked=0, Total=3192 [2023-11-19 04:10:22,380 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 163 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:22,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 68 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 204 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-11-19 04:10:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-19 04:10:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2023-11-19 04:10:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 04:10:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2023-11-19 04:10:22,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 23 [2023-11-19 04:10:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:22,393 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2023-11-19 04:10:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-19 04:10:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2023-11-19 04:10:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:10:22,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:22,394 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:22,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:10:22,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:10:22,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:22,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1679276196, now seen corresponding path program 2 times [2023-11-19 04:10:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:22,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914318460] [2023-11-19 04:10:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:22,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:10:22,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:22,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914318460] [2023-11-19 04:10:22,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914318460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:10:22,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715032889] [2023-11-19 04:10:22,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:10:22,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:10:22,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:10:22,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:10:22,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:10:23,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 04:10:23,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:10:23,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 04:10:23,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:10:23,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-19 04:10:23,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2023-11-19 04:10:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 04:10:23,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:10:23,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-19 04:10:23,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 04:10:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:10:23,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715032889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:10:23,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [658767521] [2023-11-19 04:10:23,752 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:10:23,752 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:10:23,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:10:23,753 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:10:23,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:10:24,597 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:10:24,599 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:10:25,476 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1006#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_#t~mem9#1| (+ |ULTIMATE.start_main_~i~0#1| 1)))' at error location [2023-11-19 04:10:25,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:10:25,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:10:25,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 27 [2023-11-19 04:10:25,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038369974] [2023-11-19 04:10:25,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:10:25,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 04:10:25,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:25,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 04:10:25,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2023-11-19 04:10:25,480 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-19 04:10:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:26,185 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-11-19 04:10:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 04:10:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 26 [2023-11-19 04:10:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:26,188 INFO L225 Difference]: With dead ends: 55 [2023-11-19 04:10:26,188 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 04:10:26,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2023-11-19 04:10:26,191 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:26,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 127 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:10:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 04:10:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-11-19 04:10:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-19 04:10:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-11-19 04:10:26,205 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2023-11-19 04:10:26,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:26,206 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-11-19 04:10:26,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 21 states have internal predecessors, (38), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2023-11-19 04:10:26,206 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-11-19 04:10:26,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:10:26,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:26,208 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:26,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 04:10:26,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:10:26,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:26,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:26,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1430596478, now seen corresponding path program 3 times [2023-11-19 04:10:26,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:26,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561825990] [2023-11-19 04:10:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:26,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:10:26,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561825990] [2023-11-19 04:10:26,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561825990] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:10:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27185979] [2023-11-19 04:10:26,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:10:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:10:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:10:26,861 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:10:26,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:10:26,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:10:26,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:10:26,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 04:10:26,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:10:27,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 04:10:27,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-19 04:10:27,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-19 04:10:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:10:27,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:10:29,504 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (< 3 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) (+ |c_ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8)))) is different from false [2023-11-19 04:10:29,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27185979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:10:29,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927378686] [2023-11-19 04:10:29,517 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:10:29,517 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:10:29,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:10:29,518 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:10:29,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:10:30,177 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:10:30,178 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:10:35,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1326#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_#t~mem9#1| (+ |ULTIMATE.start_main_~i~0#1| 1)))' at error location [2023-11-19 04:10:35,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:10:35,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:10:35,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2023-11-19 04:10:35,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490862854] [2023-11-19 04:10:35,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 04:10:35,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 04:10:35,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 04:10:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1165, Unknown=3, NotChecked=70, Total=1406 [2023-11-19 04:10:35,006 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-19 04:10:37,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:10:39,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:10:43,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 04:10:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:43,754 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-11-19 04:10:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 04:10:43,755 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 31 [2023-11-19 04:10:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:43,757 INFO L225 Difference]: With dead ends: 76 [2023-11-19 04:10:43,757 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 04:10:43,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=4, NotChecked=108, Total=3192 [2023-11-19 04:10:43,760 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 190 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 39 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:43,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 103 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 252 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2023-11-19 04:10:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 04:10:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 35. [2023-11-19 04:10:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 04:10:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-19 04:10:43,784 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2023-11-19 04:10:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:43,784 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-19 04:10:43,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-19 04:10:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-19 04:10:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:10:43,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:43,787 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:43,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:10:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 04:10:43,993 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:43,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash 66343333, now seen corresponding path program 4 times [2023-11-19 04:10:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:43,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122306683] [2023-11-19 04:10:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:10:44,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:44,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122306683] [2023-11-19 04:10:44,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122306683] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:10:44,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862712681] [2023-11-19 04:10:44,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:10:44,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:10:44,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:10:44,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:10:44,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:10:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:44,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 04:10:44,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:10:45,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 04:10:45,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-19 04:10:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:10:45,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:10:45,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-19 04:10:45,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-11-19 04:10:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 04:10:45,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862712681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:10:45,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159570316] [2023-11-19 04:10:45,782 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:10:45,782 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:10:45,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:10:45,783 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:10:45,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:10:46,635 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-19 04:10:46,636 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:10:47,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1764#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= (+ |ULTIMATE.start_main_~i~0#1| 1) |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (* |ULTIMATE.start_main_~i~0#1| 4))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= |ULTIMATE.start_main_#t~mem9#1| (+ |ULTIMATE.start_main_~i~0#1| 1)))' at error location [2023-11-19 04:10:47,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:10:47,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:10:47,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2023-11-19 04:10:47,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399248575] [2023-11-19 04:10:47,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:10:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-19 04:10:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:47,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-19 04:10:47,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1752, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 04:10:47,864 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 33 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 27 states have internal predecessors, (53), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-19 04:10:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:48,847 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2023-11-19 04:10:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 04:10:48,848 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 27 states have internal predecessors, (53), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) Word has length 34 [2023-11-19 04:10:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:48,851 INFO L225 Difference]: With dead ends: 67 [2023-11-19 04:10:48,851 INFO L226 Difference]: Without dead ends: 65 [2023-11-19 04:10:48,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2023-11-19 04:10:48,854 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 92 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:48,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 260 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:10:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-19 04:10:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2023-11-19 04:10:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-19 04:10:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-11-19 04:10:48,874 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 34 [2023-11-19 04:10:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:48,875 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-11-19 04:10:48,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 27 states have internal predecessors, (53), 11 states have call successors, (12), 1 states have call predecessors, (12), 2 states have return successors, (13), 13 states have call predecessors, (13), 11 states have call successors, (13) [2023-11-19 04:10:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-11-19 04:10:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:10:48,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:48,877 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:48,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:10:49,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 04:10:49,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:49,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:49,081 INFO L85 PathProgramCache]: Analyzing trace with hash -2038163805, now seen corresponding path program 5 times [2023-11-19 04:10:49,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:49,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025450144] [2023-11-19 04:10:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:49,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:10:49,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:49,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025450144] [2023-11-19 04:10:49,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025450144] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:10:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199683118] [2023-11-19 04:10:49,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:10:49,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:10:49,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:10:49,262 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:10:49,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd5b2485-50a0-4167-9587-6fd34c6f3f77/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 04:10:49,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-19 04:10:49,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:10:49,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 04:10:49,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:10:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:10:49,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:10:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:10:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199683118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:10:49,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070940279] [2023-11-19 04:10:49,695 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-19 04:10:49,695 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:10:49,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:10:49,696 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:10:49,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs