./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire --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 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:39:35,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:39:36,132 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:39:36,143 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:39:36,144 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:39:36,204 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:39:36,204 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:39:36,205 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:39:36,206 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:39:36,211 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:39:36,212 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:39:36,213 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:39:36,213 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:39:36,215 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:39:36,215 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:39:36,216 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:39:36,216 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:39:36,227 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:39:36,228 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:39:36,229 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:39:36,229 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:39:36,230 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:39:36,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:39:36,233 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:39:36,233 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:39:36,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:39:36,234 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:39:36,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:39:36,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:39:36,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:39:36,237 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:39:36,238 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:39:36,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:39:36,238 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:39:36,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:39:36,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:39:36,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:39:36,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:36,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:39:36,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:39:36,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:39:36,242 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:39:36,242 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:39:36,242 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:39:36,243 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:39:36,243 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:39:36,244 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:39:36,244 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_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2023-11-23 20:39:36,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:39:36,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:39:36,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:39:36,663 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:39:36,663 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:39:36,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-11-23 20:39:39,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:39:40,169 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:39:40,170 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2023-11-23 20:39:40,180 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/data/693e6fada/b353c25ad98a47cba3b692a00f236f83/FLAG4fef83c42 [2023-11-23 20:39:40,201 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/data/693e6fada/b353c25ad98a47cba3b692a00f236f83 [2023-11-23 20:39:40,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:39:40,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:39:40,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:40,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:39:40,224 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:39:40,225 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,226 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c961e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40, skipping insertion in model container [2023-11-23 20:39:40,226 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,250 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:39:40,410 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_4d852966-a573-4acf-afa9-9079d6555c55/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-11-23 20:39:40,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:40,447 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:39:40,462 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_4d852966-a573-4acf-afa9-9079d6555c55/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2023-11-23 20:39:40,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:39:40,491 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:39:40,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40 WrapperNode [2023-11-23 20:39:40,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:39:40,493 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:40,493 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:39:40,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:39:40,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,531 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2023-11-23 20:39:40,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:39:40,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:39:40,533 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:39:40,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:39:40,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,546 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,559 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,563 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,565 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,568 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:39:40,578 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:39:40,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:39:40,579 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:39:40,580 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (1/1) ... [2023-11-23 20:39:40,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:39:40,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:40,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:39:40,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:39:40,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:39:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:39:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:39:40,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:39:40,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:39:40,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:39:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:39:40,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:39:40,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:39:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:39:40,811 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:39:40,814 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:39:41,100 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:39:41,205 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:39:41,205 INFO L309 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-23 20:39:41,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:41 BoogieIcfgContainer [2023-11-23 20:39:41,207 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:39:41,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:39:41,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:39:41,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:39:41,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:39:40" (1/3) ... [2023-11-23 20:39:41,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5aa063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:41, skipping insertion in model container [2023-11-23 20:39:41,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:39:40" (2/3) ... [2023-11-23 20:39:41,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5aa063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:39:41, skipping insertion in model container [2023-11-23 20:39:41,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:39:41" (3/3) ... [2023-11-23 20:39:41,217 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2023-11-23 20:39:41,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:39:41,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:39:41,296 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:39:41,303 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;@10183ca6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:39:41,303 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:39:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:39:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 20:39:41,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:41,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:41,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:41,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:41,324 INFO L85 PathProgramCache]: Analyzing trace with hash -917584139, now seen corresponding path program 1 times [2023-11-23 20:39:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901179003] [2023-11-23 20:39:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:41,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:41,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901179003] [2023-11-23 20:39:41,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901179003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:41,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:41,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:39:41,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233155062] [2023-11-23 20:39:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:41,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:39:41,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:41,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:39:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:39:41,580 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:41,698 INFO L93 Difference]: Finished difference Result 56 states and 90 transitions. [2023-11-23 20:39:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:39:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 20:39:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:41,709 INFO L225 Difference]: With dead ends: 56 [2023-11-23 20:39:41,710 INFO L226 Difference]: Without dead ends: 35 [2023-11-23 20:39:41,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:39:41,717 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:41,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-23 20:39:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2023-11-23 20:39:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:39:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2023-11-23 20:39:41,765 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 8 [2023-11-23 20:39:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:41,766 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2023-11-23 20:39:41,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2023-11-23 20:39:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:39:41,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:41,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:41,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:39:41,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:41,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:41,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1778615702, now seen corresponding path program 1 times [2023-11-23 20:39:41,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:41,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755558828] [2023-11-23 20:39:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:41,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:41,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755558828] [2023-11-23 20:39:41,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755558828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:41,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334158160] [2023-11-23 20:39:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:41,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:41,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:41,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:39:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:42,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:39:42,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:42,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:39:42,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334158160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758656922] [2023-11-23 20:39:42,189 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-23 20:39:42,190 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:42,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:42,201 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:42,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:42,575 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:39:42,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [758656922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:42,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:39:42,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 8 [2023-11-23 20:39:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890523458] [2023-11-23 20:39:42,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:42,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:39:42,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:42,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:39:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:39:42,653 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:42,778 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2023-11-23 20:39:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:39:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 20:39:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:42,781 INFO L225 Difference]: With dead ends: 43 [2023-11-23 20:39:42,782 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 20:39:42,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:39:42,784 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:42,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 20:39:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2023-11-23 20:39:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:39:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-23 20:39:42,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 9 [2023-11-23 20:39:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:42,800 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-23 20:39:42,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-11-23 20:39:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:39:42,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:42,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:42,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:43,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:43,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:43,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:43,027 INFO L85 PathProgramCache]: Analyzing trace with hash 523252138, now seen corresponding path program 1 times [2023-11-23 20:39:43,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:43,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741473293] [2023-11-23 20:39:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:43,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:39:43,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741473293] [2023-11-23 20:39:43,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741473293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155728720] [2023-11-23 20:39:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:43,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:43,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:43,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:39:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:39:43,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:39:43,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:39:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155728720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:43,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:39:43,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-23 20:39:43,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35271899] [2023-11-23 20:39:43,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:43,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:39:43,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:39:43,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:43,298 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:43,346 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2023-11-23 20:39:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:39:43,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 20:39:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:43,348 INFO L225 Difference]: With dead ends: 39 [2023-11-23 20:39:43,348 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 20:39:43,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:39:43,350 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:43,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:39:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 20:39:43,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-23 20:39:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:39:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2023-11-23 20:39:43,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 15 [2023-11-23 20:39:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:43,363 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2023-11-23 20:39:43,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:43,363 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2023-11-23 20:39:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:39:43,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:43,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:43,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:43,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:43,587 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:43,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1766431364, now seen corresponding path program 1 times [2023-11-23 20:39:43,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:43,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840360699] [2023-11-23 20:39:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:39:43,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:43,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840360699] [2023-11-23 20:39:43,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840360699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:43,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976397502] [2023-11-23 20:39:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:43,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:43,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:43,701 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:43,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:39:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:43,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:39:43,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:39:43,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:39:43,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976397502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:43,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83662149] [2023-11-23 20:39:43,851 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-11-23 20:39:43,851 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:43,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:43,852 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:43,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:44,503 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:39:44,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [83662149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:44,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:39:44,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 12 [2023-11-23 20:39:44,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20547060] [2023-11-23 20:39:44,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:44,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:39:44,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:39:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:39:44,967 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:45,518 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2023-11-23 20:39:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 20:39:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 20:39:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:45,519 INFO L225 Difference]: With dead ends: 41 [2023-11-23 20:39:45,520 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 20:39:45,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:39:45,521 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:45,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 20:39:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-11-23 20:39:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:39:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-23 20:39:45,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 16 [2023-11-23 20:39:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:45,530 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-23 20:39:45,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-23 20:39:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:39:45,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:45,532 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:45,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:45,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:45,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:45,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1666995883, now seen corresponding path program 1 times [2023-11-23 20:39:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:45,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993808370] [2023-11-23 20:39:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:45,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:39:45,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:45,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993808370] [2023-11-23 20:39:45,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993808370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:45,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756284286] [2023-11-23 20:39:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:45,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:45,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:45,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:45,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:39:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:45,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:39:45,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:39:45,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:39:45,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756284286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:45,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758945201] [2023-11-23 20:39:45,968 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:39:45,968 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:45,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:45,969 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:45,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:47,155 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-23 20:39:47,292 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:39:50,429 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~size#1_25| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_~set#1.base_25| Int) (|v_ULTIMATE.start_main_#t~ret15#1_32| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_24| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~size#1_24| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~value#1_24| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_21| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_1| Int) (|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~set#1.offset_24| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~value#1_24| Int) (|v_ULTIMATE.start_insert_~value#1_25| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_52| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_#t~mem14#1_34| Int) (|v_ULTIMATE.start_insert_~set#1.offset_25| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#in~size#1_24| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_21| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_31| Int) (|v_ULTIMATE.start_insert_#res#1_23| Int)) (let ((.cse4 (= |v_ULTIMATE.start_elem_exists_~i~0#1_31| 0)) (.cse5 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0))) (let ((.cse2 (and .cse4 .cse5 (<= |v_ULTIMATE.start_elem_exists_~size#1_24| 0))) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_24|))) (and (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1|))))) (or (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 2147483648)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1|) (or .cse2 (and .cse3 .cse4 .cse5 (= (select (select |v_#memory_int_63| |v_ULTIMATE.start_elem_exists_~set#1.base_21|) |v_ULTIMATE.start_elem_exists_~set#1.offset_21|) |v_ULTIMATE.start_elem_exists_~value#1_24|))) (or (and (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~value#1_24|) (= |v_ULTIMATE.start_insert_~value#1_25| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_1|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~size#1_25|) (= |v_#memory_int_63| |c_#memory_int|) (= |v_ULTIMATE.start_insert_#in~set#1.base_24| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_1|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~set#1.offset_25|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~size#1_24|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_1| |v_ULTIMATE.start_insert_~set#1.base_25|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#in~set#1.offset_24|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_23|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_#t~ret15#1_32|) (not .cse5) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_#t~mem14#1_34|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_main_~n~0#1_52|)) (and (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483648)) (= (store |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| (store (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~n~0#1_52| 4)) (select (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| 4))))) |c_#memory_int|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483647) .cse5 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~n~0#1_52| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1|))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1|) (or .cse2 (and .cse3 .cse4 .cse5)) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 2147483647))))) is different from true [2023-11-23 20:39:50,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '774#(and (exists ((|v_#memory_int_63| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~value#1_24| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_52| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_elem_exists_~size#1_24| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_21| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_21| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_31| Int)) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_31| 0) (= |#memory_int| (store |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1| (store (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~n~0#1_52| 4)) (select (select |v_#memory_int_63| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_1|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1| 4)))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| 2147483647) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_1| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_1| 4))) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1| (+ |v_ULTIMATE.start_main_~n~0#1_52| 1)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_1|) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_1|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_24| 1) (= (select (select |v_#memory_int_63| |v_ULTIMATE.start_elem_exists_~set#1.base_21|) |v_ULTIMATE.start_elem_exists_~set#1.offset_21|) |v_ULTIMATE.start_elem_exists_~value#1_24|)))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 20:39:50,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:39:50,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:39:50,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-23 20:39:50,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271244288] [2023-11-23 20:39:50,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:39:50,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:39:50,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:50,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:39:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=260, Unknown=9, NotChecked=34, Total=380 [2023-11-23 20:39:50,637 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:50,717 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2023-11-23 20:39:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:39:50,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-23 20:39:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:50,720 INFO L225 Difference]: With dead ends: 66 [2023-11-23 20:39:50,720 INFO L226 Difference]: Without dead ends: 44 [2023-11-23 20:39:50,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=77, Invalid=260, Unknown=9, NotChecked=34, Total=380 [2023-11-23 20:39:50,722 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:50,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 24 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-23 20:39:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2023-11-23 20:39:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:39:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-23 20:39:50,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 20 [2023-11-23 20:39:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:50,741 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-23 20:39:50,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-23 20:39:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:39:50,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:50,743 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:50,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:50,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:50,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:50,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash -964089174, now seen corresponding path program 2 times [2023-11-23 20:39:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:50,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182854674] [2023-11-23 20:39:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:39:51,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182854674] [2023-11-23 20:39:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182854674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659239164] [2023-11-23 20:39:51,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:39:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:51,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:51,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:39:51,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:39:51,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:39:51,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:39:51,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:39:51,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:39:51,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659239164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:51,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1532341881] [2023-11-23 20:39:51,250 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:39:51,251 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:51,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:51,251 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:51,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:52,218 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-23 20:39:52,336 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:39:55,367 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_elem_exists_~value#1_32| Int) (|v_#memory_int_76| (Array Int (Array Int Int))) (|v_ULTIMATE.start_insert_#in~set#1.offset_30| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~value#1_31| Int) (|v_ULTIMATE.start_main_#t~mem14#1_40| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_29| Int) (|v_ULTIMATE.start_insert_#in~size#1_30| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_#t~ret15#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.offset_31| Int) (|v_ULTIMATE.start_insert_~set#1.base_31| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~size#1_31| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_39| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_58| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_29| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_30| Int) (|v_ULTIMATE.start_elem_exists_~size#1_32| Int) (|v_ULTIMATE.start_insert_#res#1_29| Int) (|v_ULTIMATE.start_insert_#in~value#1_30| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_2| Int)) (let ((.cse1 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0)) (.cse3 (= |v_ULTIMATE.start_elem_exists_~i~0#1_39| 0))) (let ((.cse0 (and .cse1 .cse3 (<= |v_ULTIMATE.start_elem_exists_~size#1_32| 0))) (.cse2 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_32|))) (and (or .cse0 (and .cse1 .cse2 .cse3 (= (select (select |v_#memory_int_76| |v_ULTIMATE.start_elem_exists_~set#1.base_29|) |v_ULTIMATE.start_elem_exists_~set#1.offset_29|) |v_ULTIMATE.start_elem_exists_~value#1_32|))) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|))) (= (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| 4)) (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2|))))) (or (and .cse4 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse4) (= |c___VERIFIER_assert_#in~cond| 1)))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2|) (or (and .cse1 (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| (+ |v_ULTIMATE.start_main_~n~0#1_58| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483647) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483648)) (= (store |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| (store (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~n~0#1_58| 4)) (select (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2|)))) |c_#memory_int|)) (and (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_#t~mem14#1_40|) (not .cse1) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~set#1.offset_30|) (= |v_ULTIMATE.start_insert_#in~set#1.base_30| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_2|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~set#1.base_31|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_#t~ret15#1_38|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~set#1.offset_31|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~value#1_30|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_29|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_~size#1_31|) (= |v_#memory_int_76| |c_#memory_int|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_main_~n~0#1_58|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#in~size#1_30|) (= |v_ULTIMATE.start_insert_~value#1_31| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_2|))) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 2147483647) (or .cse0 (and .cse1 .cse2 .cse3)) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 2147483648)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2|))))) is different from true [2023-11-23 20:39:55,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1081#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_elem_exists_~value#1_32| Int) (|v_#memory_int_76| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~i~0#1_39| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_58| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_29| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_29| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_elem_exists_~size#1_32| Int)) (and (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_2| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2|) (= (store |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2| (store (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~n~0#1_58| 4)) (select (select |v_#memory_int_76| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_2|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_2|)))) |#memory_int|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_2| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_39| 0) (or (= (select (select |v_#memory_int_76| |v_ULTIMATE.start_elem_exists_~set#1.base_29|) |v_ULTIMATE.start_elem_exists_~set#1.offset_29|) |v_ULTIMATE.start_elem_exists_~value#1_32|) (< |v_ULTIMATE.start_elem_exists_~size#1_32| 1)) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| (+ |v_ULTIMATE.start_main_~n~0#1_58| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_2| 2147483647) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_2|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_2|)))))' at error location [2023-11-23 20:39:55,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:39:55,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:39:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 20:39:55,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74050634] [2023-11-23 20:39:55,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:39:55,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:39:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:39:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=284, Unknown=10, NotChecked=34, Total=380 [2023-11-23 20:39:55,610 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:55,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:55,704 INFO L93 Difference]: Finished difference Result 66 states and 89 transitions. [2023-11-23 20:39:55,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:39:55,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-23 20:39:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:55,706 INFO L225 Difference]: With dead ends: 66 [2023-11-23 20:39:55,706 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 20:39:55,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=52, Invalid=284, Unknown=10, NotChecked=34, Total=380 [2023-11-23 20:39:55,714 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:55,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:39:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 20:39:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-23 20:39:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:39:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2023-11-23 20:39:55,731 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 23 [2023-11-23 20:39:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:55,731 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2023-11-23 20:39:55,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:39:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2023-11-23 20:39:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:39:55,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:55,733 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:55,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:55,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:55,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:55,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:55,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2101592878, now seen corresponding path program 3 times [2023-11-23 20:39:55,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:55,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433113099] [2023-11-23 20:39:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:55,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:39:56,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:56,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433113099] [2023-11-23 20:39:56,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433113099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:39:56,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266818635] [2023-11-23 20:39:56,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:39:56,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:56,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:56,129 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:56,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:39:56,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:39:56,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:39:56,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:39:56,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:39:56,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:39:56,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:39:56,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266818635] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:39:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220651292] [2023-11-23 20:39:56,364 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:39:56,364 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:39:56,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:39:56,364 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:39:56,365 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:39:57,217 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-23 20:39:57,318 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:00,308 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_#memory_int_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~value#1_39| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~mem14#1_48| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_66| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_38| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.offset_39| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~size#1_44| Int) (|v_ULTIMATE.start_insert_#in~size#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_41| Int) (|v_ULTIMATE.start_insert_#res#1_37| Int) (|v_ULTIMATE.start_elem_exists_~value#1_44| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#in~value#1_38| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_~set#1.base_39| Int) (|v_ULTIMATE.start_insert_~size#1_39| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_#t~ret15#1_46| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_51| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_41| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_38| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_3| Int)) (let ((.cse1 (= |v_ULTIMATE.start_elem_exists_~i~0#1_51| 0)) (.cse3 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0))) (let ((.cse2 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_44|)) (.cse0 (and .cse1 .cse3 (<= |v_ULTIMATE.start_elem_exists_~size#1_44| 0)))) (and (or .cse0 (and .cse1 .cse2 .cse3 (= |v_ULTIMATE.start_elem_exists_~value#1_44| (select (select |v_#memory_int_98| |v_ULTIMATE.start_elem_exists_~set#1.base_41|) |v_ULTIMATE.start_elem_exists_~set#1.offset_41|)))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 2147483648)) (or (and (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483648)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483647) .cse3 (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|) (= (store |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| (store (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~n~0#1_66| 4)) (select (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3|)))) |c_#memory_int|) (= (+ |v_ULTIMATE.start_main_~n~0#1_66| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|)) (and (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~value#1_38|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_#t~ret15#1_46|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~set#1.offset_39|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~n~0#1_66|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_#t~mem14#1_48|) (= |v_ULTIMATE.start_insert_~value#1_39| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~size#1_38|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~set#1.base_39|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_37|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#in~set#1.offset_38|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_~size#1_39|) (= |v_#memory_int_98| |c_#memory_int|) (= |v_ULTIMATE.start_insert_#in~set#1.base_38| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_3|) (not .cse3))) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 2147483647) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3|) (or (and .cse1 .cse2 .cse3) .cse0) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|))) (= (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3|) (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse4)) (and .cse4 (= |c___VERIFIER_assert_#in~cond| 0)))))))) is different from true [2023-11-23 20:40:00,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1473#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_elem_exists_~value#1_44| Int) (|v_#memory_int_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_66| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_elem_exists_~size#1_44| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_51| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_41| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_41| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_51| 0) (= |#memory_int| (store |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3| (store (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~n~0#1_66| 4)) (select (select |v_#memory_int_98| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_3|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_3| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_3|))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3| 2147483647) (or (< |v_ULTIMATE.start_elem_exists_~size#1_44| 1) (= |v_ULTIMATE.start_elem_exists_~value#1_44| (select (select |v_#memory_int_98| |v_ULTIMATE.start_elem_exists_~set#1.base_41|) |v_ULTIMATE.start_elem_exists_~set#1.offset_41|))) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_3| 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_3| 4))) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|) (= (+ |v_ULTIMATE.start_main_~n~0#1_66| 1) |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_3|))))' at error location [2023-11-23 20:40:00,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:00,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:40:00,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-23 20:40:00,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839016885] [2023-11-23 20:40:00,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:00,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 20:40:00,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:00,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 20:40:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=431, Unknown=9, NotChecked=46, Total=650 [2023-11-23 20:40:00,570 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:00,744 INFO L93 Difference]: Finished difference Result 130 states and 181 transitions. [2023-11-23 20:40:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:40:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-23 20:40:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:00,746 INFO L225 Difference]: With dead ends: 130 [2023-11-23 20:40:00,746 INFO L226 Difference]: Without dead ends: 91 [2023-11-23 20:40:00,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=164, Invalid=431, Unknown=9, NotChecked=46, Total=650 [2023-11-23 20:40:00,748 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:00,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:40:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-23 20:40:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2023-11-23 20:40:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:40:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-11-23 20:40:00,768 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 32 [2023-11-23 20:40:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:00,769 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-11-23 20:40:00,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-11-23 20:40:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 20:40:00,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:00,770 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:00,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:00,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:00,971 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:00,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:00,972 INFO L85 PathProgramCache]: Analyzing trace with hash -987236594, now seen corresponding path program 4 times [2023-11-23 20:40:00,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:00,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703187850] [2023-11-23 20:40:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:00,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:40:01,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703187850] [2023-11-23 20:40:01,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703187850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752577434] [2023-11-23 20:40:01,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 20:40:01,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:01,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:01,353 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:01,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:40:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:01,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:40:01,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:01,520 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:40:01,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:40:01,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752577434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:40:01,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503454217] [2023-11-23 20:40:01,767 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:40:01,767 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:01,767 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:01,767 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:01,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:02,594 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-23 20:40:02,694 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:05,631 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_elem_exists_~value#1_56| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~size#1_47| Int) (|v_ULTIMATE.start_insert_~set#1.base_47| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~ret15#1_54| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_46| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_63| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~value#1_46| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_53| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_46| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| Int) (|v_#memory_int_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_74| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_~value#1_47| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_#t~mem14#1_56| Int) (|v_ULTIMATE.start_insert_~set#1.offset_47| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#in~size#1_46| Int) (|v_ULTIMATE.start_elem_exists_~size#1_56| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_53| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_45| Int)) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0)) (.cse4 (= |v_ULTIMATE.start_elem_exists_~i~0#1_63| 0))) (let ((.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_56|)) (.cse5 (and (<= |v_ULTIMATE.start_elem_exists_~size#1_56| 0) .cse2 .cse4))) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4|) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|))) (= (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| 4)) (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4|))))) (or (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)) (and (not .cse0) (= |c___VERIFIER_assert_#in~cond| 1)))) (or (and (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~n~0#1_74| 1)) .cse2 (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483648)) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4|) (= |c_#memory_int| (store |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| (store (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~n~0#1_74| 4)) (select (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4|))))) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483647)) (and (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~set#1.base_47|) (= |v_ULTIMATE.start_insert_#in~set#1.base_46| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_4|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~n~0#1_74|) (= |c_#memory_int| |v_#memory_int_126|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~set#1.offset_46|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_#t~ret15#1_54|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~value#1_46|) (= |v_ULTIMATE.start_insert_~value#1_47| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_4|) (not .cse2) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~size#1_47|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_45|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#in~size#1_46|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_4| |v_ULTIMATE.start_insert_~set#1.offset_47|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_#t~mem14#1_56|))) (or (and .cse2 .cse3 .cse4) .cse5) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 2147483648)) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 2147483647) (or (and (= (select (select |v_#memory_int_126| |v_ULTIMATE.start_elem_exists_~set#1.base_53|) |v_ULTIMATE.start_elem_exists_~set#1.offset_53|) |v_ULTIMATE.start_elem_exists_~value#1_56|) .cse2 .cse3 .cse4) .cse5))))) is different from true [2023-11-23 20:40:05,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2038#(and (exists ((|v_ULTIMATE.start_elem_exists_~value#1_56| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| Int) (|v_#memory_int_126| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_74| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_63| Int) (|v_ULTIMATE.start_elem_exists_~size#1_56| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_53| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_53| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4|) (or (< |v_ULTIMATE.start_elem_exists_~size#1_56| 1) (= (select (select |v_#memory_int_126| |v_ULTIMATE.start_elem_exists_~set#1.base_53|) |v_ULTIMATE.start_elem_exists_~set#1.offset_53|) |v_ULTIMATE.start_elem_exists_~value#1_56|)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| (+ |v_ULTIMATE.start_main_~n~0#1_74| 1)) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_4| 0) (= |#memory_int| (store |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4| (store (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~n~0#1_74| 4)) (select (select |v_#memory_int_126| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_4|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_4| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_4|))))) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_4| 4))) (= |v_ULTIMATE.start_elem_exists_~i~0#1_63| 0) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_4| 2147483647))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 20:40:05,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:05,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:40:05,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-23 20:40:05,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784002848] [2023-11-23 20:40:05,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:05,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 20:40:05,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:05,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 20:40:05,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=880, Unknown=10, NotChecked=70, Total=1406 [2023-11-23 20:40:05,855 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:06,164 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2023-11-23 20:40:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 20:40:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-11-23 20:40:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:06,168 INFO L225 Difference]: With dead ends: 190 [2023-11-23 20:40:06,168 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 20:40:06,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=446, Invalid=880, Unknown=10, NotChecked=70, Total=1406 [2023-11-23 20:40:06,171 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 193 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:06,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 24 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:40:06,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 20:40:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 63. [2023-11-23 20:40:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 60 states have internal predecessors, (74), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:40:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-11-23 20:40:06,213 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 38 [2023-11-23 20:40:06,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:06,213 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-11-23 20:40:06,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-11-23 20:40:06,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 20:40:06,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:06,224 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:06,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:06,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:06,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:06,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash 404956878, now seen corresponding path program 5 times [2023-11-23 20:40:06,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:06,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223074028] [2023-11-23 20:40:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:40:07,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:07,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223074028] [2023-11-23 20:40:07,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223074028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:07,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053559450] [2023-11-23 20:40:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:40:07,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:07,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:07,283 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:07,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:40:07,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 20:40:07,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:40:07,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:40:07,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:40:07,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2023-11-23 20:40:07,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053559450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:40:07,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119632844] [2023-11-23 20:40:07,630 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:40:07,630 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:07,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:07,631 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:07,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:08,408 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-23 20:40:08,495 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:11,660 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~n~0#1_82| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_54| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~value#1_55| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_#t~mem14#1_64| Int) (|v_ULTIMATE.start_insert_#in~size#1_54| Int) (|v_ULTIMATE.start_elem_exists_~size#1_68| Int) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~set#1.offset_65| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.offset_55| Int) (|v_ULTIMATE.start_insert_#res#1_53| Int) (|v_ULTIMATE.start_insert_~set#1.base_55| Int) (|v_ULTIMATE.start_insert_~size#1_55| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~value#1_68| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_54| Int) (|v_ULTIMATE.start_main_#t~ret15#1_62| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_65| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_75| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#in~value#1_54| Int)) (let ((.cse0 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0)) (.cse5 (= |v_ULTIMATE.start_elem_exists_~i~0#1_75| 0))) (let ((.cse4 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_68|)) (.cse3 (and .cse0 (<= |v_ULTIMATE.start_elem_exists_~size#1_68| 0) .cse5))) (and (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 2147483647) (or (and (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_#t~mem14#1_64|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_#t~ret15#1_62|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~size#1_54|) (= |c_#memory_int| |v_#memory_int_144|) (= |v_ULTIMATE.start_insert_#in~set#1.base_54| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_5|) (= |v_ULTIMATE.start_insert_~value#1_55| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_5|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~set#1.offset_55|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~size#1_55|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_53|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~value#1_54|) (not .cse0) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#in~set#1.offset_54|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_main_~n~0#1_82|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_5| |v_ULTIMATE.start_insert_~set#1.base_55|)) (and (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483648)) .cse0 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| (+ |v_ULTIMATE.start_main_~n~0#1_82| 1)) (= (store |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| (store (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~n~0#1_82| 4)) (select (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5|)))) |c_#memory_int|))) (let ((.cse1 (let ((.cse2 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|))) (= (select .cse2 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| 4)) (select .cse2 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5|))))) (or (and (not .cse1) (= |c___VERIFIER_assert_#in~cond| 1)) (and (= |c___VERIFIER_assert_#in~cond| 0) .cse1))) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 2147483648)) (or .cse3 (and .cse0 .cse4 .cse5)) (or (and .cse0 .cse4 .cse5 (= (select (select |v_#memory_int_144| |v_ULTIMATE.start_elem_exists_~set#1.base_65|) |v_ULTIMATE.start_elem_exists_~set#1.offset_65|) |v_ULTIMATE.start_elem_exists_~value#1_68|)) .cse3) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5|) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|))))) is different from true [2023-11-23 20:40:11,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2817#(and (exists ((|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~value#1_68| Int) (|v_ULTIMATE.start_main_~n~0#1_82| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~size#1_68| Int) (|v_#memory_int_144| (Array Int (Array Int Int))) (|v_ULTIMATE.start_elem_exists_~set#1.offset_65| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_65| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_75| Int)) (and (or (< |v_ULTIMATE.start_elem_exists_~size#1_68| 1) (= (select (select |v_#memory_int_144| |v_ULTIMATE.start_elem_exists_~set#1.base_65|) |v_ULTIMATE.start_elem_exists_~set#1.offset_65|) |v_ULTIMATE.start_elem_exists_~value#1_68|)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_5| 0) (= |v_ULTIMATE.start_elem_exists_~i~0#1_75| 0) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_5| (+ |v_ULTIMATE.start_main_~n~0#1_82| 1)) (= (store |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5| (store (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~n~0#1_82| 4)) (select (select |v_#memory_int_144| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_5|) (+ (- 4) (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5| 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_5|)))) |#memory_int|) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_5|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5| 4)) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_5|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_5|)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_5|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 20:40:11,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:11,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:40:11,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-23 20:40:11,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781456664] [2023-11-23 20:40:11,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:11,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-23 20:40:11,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:11,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-23 20:40:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=1645, Unknown=10, NotChecked=90, Total=2256 [2023-11-23 20:40:11,958 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:12,654 INFO L93 Difference]: Finished difference Result 245 states and 347 transitions. [2023-11-23 20:40:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 20:40:12,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-23 20:40:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:12,657 INFO L225 Difference]: With dead ends: 245 [2023-11-23 20:40:12,657 INFO L226 Difference]: Without dead ends: 206 [2023-11-23 20:40:12,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=861, Invalid=2315, Unknown=20, NotChecked=110, Total=3306 [2023-11-23 20:40:12,660 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 556 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:12,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 55 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:40:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-23 20:40:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 112. [2023-11-23 20:40:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 109 states have (on average 1.2935779816513762) internal successors, (141), 109 states have internal predecessors, (141), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:40:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 143 transitions. [2023-11-23 20:40:12,690 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 143 transitions. Word has length 50 [2023-11-23 20:40:12,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:12,690 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 143 transitions. [2023-11-23 20:40:12,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 143 transitions. [2023-11-23 20:40:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 20:40:12,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:12,692 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:12,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:12,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:12,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:12,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:12,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1967788957, now seen corresponding path program 6 times [2023-11-23 20:40:12,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:12,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754306844] [2023-11-23 20:40:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:12,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-23 20:40:13,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754306844] [2023-11-23 20:40:13,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754306844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230262983] [2023-11-23 20:40:13,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:40:13,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:13,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:14,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:40:14,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:40:14,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:40:14,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 20:40:14,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-23 20:40:14,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-23 20:40:15,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230262983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:40:15,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [239468591] [2023-11-23 20:40:15,116 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:40:15,116 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:15,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:15,117 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:15,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:15,810 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-23 20:40:15,913 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:18,860 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~value#1_92| Int) (|v_ULTIMATE.start_insert_~size#1_69| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~set#1.base_69| Int) (|v_ULTIMATE.start_main_#t~ret15#1_76| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_68| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~value#1_68| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_89| Int) (|v_ULTIMATE.start_elem_exists_~size#1_92| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_68| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_99| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~n~0#1_96| Int) (|v_ULTIMATE.start_insert_~value#1_69| Int) (|v_ULTIMATE.start_main_#t~mem14#1_78| Int) (|v_ULTIMATE.start_insert_~set#1.offset_69| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#in~size#1_68| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_89| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_67| Int) (|v_#memory_int_197| (Array Int (Array Int Int)))) (let ((.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_99| 0)) (.cse4 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 0))) (let ((.cse5 (and .cse2 (<= |v_ULTIMATE.start_elem_exists_~size#1_92| 0) .cse4)) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_92|))) (and (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6|) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|))) (= (select .cse1 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6|) (select .cse1 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse0)) (and .cse0 (= |c___VERIFIER_assert_#in~cond| 0)))) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 2147483648)) (or (and .cse2 .cse3 (= |v_ULTIMATE.start_elem_exists_~value#1_92| (select (select |v_#memory_int_197| |v_ULTIMATE.start_elem_exists_~set#1.base_89|) |v_ULTIMATE.start_elem_exists_~set#1.offset_89|)) .cse4) .cse5) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 2147483647) (or .cse5 (and .cse2 .cse3 .cse4)) (or (and (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~size#1_69|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~value#1_68|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_67|) (not .cse4) (= |c_#memory_int| |v_#memory_int_197|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~size#1_68|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~set#1.offset_69|) (= |v_ULTIMATE.start_insert_#in~set#1.base_68| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_6|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_~n~0#1_96|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_#t~ret15#1_76|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_6| |v_ULTIMATE.start_insert_~set#1.base_69|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#in~set#1.offset_68|) (= |v_ULTIMATE.start_insert_~value#1_69| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_6|) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_6| |v_ULTIMATE.start_main_#t~mem14#1_78|)) (and (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483647) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~n~0#1_96| 1)) (= (store |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| (store (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~n~0#1_96| 4)) (select (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6|)))) |c_#memory_int|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483648)) .cse4)))))) is different from true [2023-11-23 20:40:19,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3952#(and (exists ((|v_ULTIMATE.start_elem_exists_~size#1_92| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_99| Int) (|v_ULTIMATE.start_main_~n~0#1_96| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~value#1_92| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_89| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_89| Int) (|v_#memory_int_197| (Array Int (Array Int Int)))) (and (= |v_ULTIMATE.start_elem_exists_~i~0#1_99| 0) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6|) (= |#memory_int| (store |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6| (store (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~n~0#1_96| 4)) (select (select |v_#memory_int_197| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_6|) (+ (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6| 4) (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_6|))))) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_6| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6|) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| 2147483647) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_6|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_6| (+ |v_ULTIMATE.start_main_~n~0#1_96| 1)) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_6| 0) (or (= |v_ULTIMATE.start_elem_exists_~value#1_92| (select (select |v_#memory_int_197| |v_ULTIMATE.start_elem_exists_~set#1.base_89|) |v_ULTIMATE.start_elem_exists_~set#1.offset_89|)) (< |v_ULTIMATE.start_elem_exists_~size#1_92| 1)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_6| 4))))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 20:40:19,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:19,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:40:19,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-23 20:40:19,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092132130] [2023-11-23 20:40:19,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:19,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-23 20:40:19,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-23 20:40:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2349, Unknown=10, NotChecked=122, Total=4032 [2023-11-23 20:40:19,109 INFO L87 Difference]: Start difference. First operand 112 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:40:19,957 INFO L93 Difference]: Finished difference Result 416 states and 598 transitions. [2023-11-23 20:40:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-23 20:40:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-23 20:40:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:40:19,961 INFO L225 Difference]: With dead ends: 416 [2023-11-23 20:40:19,962 INFO L226 Difference]: Without dead ends: 329 [2023-11-23 20:40:19,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1551, Invalid=2349, Unknown=10, NotChecked=122, Total=4032 [2023-11-23 20:40:19,966 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 520 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:40:19,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 48 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:40:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-23 20:40:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 137. [2023-11-23 20:40:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 134 states have (on average 1.2388059701492538) internal successors, (166), 134 states have internal predecessors, (166), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:40:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 168 transitions. [2023-11-23 20:40:20,001 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 168 transitions. Word has length 75 [2023-11-23 20:40:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:40:20,002 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 168 transitions. [2023-11-23 20:40:20,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 50 states have internal predecessors, (66), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:40:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 168 transitions. [2023-11-23 20:40:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-23 20:40:20,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:40:20,004 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:40:20,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 20:40:20,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:20,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:40:20,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:40:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1903898546, now seen corresponding path program 7 times [2023-11-23 20:40:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:40:20,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886462899] [2023-11-23 20:40:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:40:20,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:40:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-23 20:40:23,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:40:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886462899] [2023-11-23 20:40:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886462899] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:40:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200297182] [2023-11-23 20:40:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 20:40:23,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:40:23,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:40:23,111 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:40:23,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d852966-a573-4acf-afa9-9079d6555c55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 20:40:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:40:23,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 20:40:23,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:40:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-23 20:40:23,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:40:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1376 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-23 20:40:26,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200297182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:40:26,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115058359] [2023-11-23 20:40:26,746 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:40:26,746 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:40:26,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:40:26,747 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:40:26,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:40:27,539 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 109 for LOIs [2023-11-23 20:40:27,628 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:40:30,898 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_insert_~size#1_83| Int) (|v_ULTIMATE.start_insert_~set#1.base_83| Int) (|v_ULTIMATE.start_insert_#res#1_81| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~size#1_82| Int) (|v_ULTIMATE.start_insert_#in~value#1_82| Int) (|v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_#in~set#1.offset_82| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~value#1_83| Int) (|v_ULTIMATE.start_elem_exists_~value#1_116| Int) (|v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~ret15#1_90| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_82| Int) (|v_ULTIMATE.start_elem_exists_~size#1_116| Int) (|v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_113| Int) (|v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_123| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_#t~mem14#1_92| Int) (|v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_insert_~set#1.offset_83| Int) (|v_#memory_int_275| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_110| Int) (|v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_113| Int)) (let ((.cse1 (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 0)) (.cse2 (= |v_ULTIMATE.start_elem_exists_~i~0#1_123| 0))) (let ((.cse0 (and .cse1 .cse2 (<= |v_ULTIMATE.start_elem_exists_~size#1_116| 0))) (.cse3 (<= 1 |v_ULTIMATE.start_elem_exists_~size#1_116|))) (and (or .cse0 (and .cse1 .cse2 (= (select (select |v_#memory_int_275| |v_ULTIMATE.start_elem_exists_~set#1.base_113|) |v_ULTIMATE.start_elem_exists_~set#1.offset_113|) |v_ULTIMATE.start_elem_exists_~value#1_116|) .cse3)) (or .cse0 (and .cse1 .cse2 .cse3)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7|) (<= 0 (+ |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 2147483648)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7|) (<= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 2147483647) (or (and (= |v_ULTIMATE.start_insert_#in~set#1.base_82| |v_ULTIMATE.start_insert_#in~set#1.base_BEFORE_CALL_7|) (= |v_ULTIMATE.start_insert_~set#1.base_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~set#1.base_83|) (= |v_ULTIMATE.start_main_#t~ret15#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_#t~ret15#1_90|) (= |v_ULTIMATE.start_insert_#in~value#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~value#1_82|) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_81|) (not .cse1) (= |v_ULTIMATE.start_main_#t~mem14#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_#t~mem14#1_92|) (= |v_ULTIMATE.start_insert_~set#1.offset_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~set#1.offset_83|) (= |v_ULTIMATE.start_insert_#in~size#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~size#1_82|) (= |v_ULTIMATE.start_insert_#in~set#1.offset_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#in~set#1.offset_82|) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~n~0#1_110|) (= |v_ULTIMATE.start_insert_~value#1_83| |v_ULTIMATE.start_insert_~value#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_insert_~size#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_~size#1_83|) (= |c_#memory_int| |v_#memory_int_275|)) (and .cse1 (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| (+ |v_ULTIMATE.start_main_~n~0#1_110| 1)) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483647) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7|) (= (store |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| (store (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~n~0#1_110| 4)) (select (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| 4))))) |c_#memory_int|) (<= 0 (+ |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483648)))) (let ((.cse4 (let ((.cse5 (select |c_#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|))) (= (select .cse5 |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7|) (select .cse5 (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| 4)))))) (or (and (= |c___VERIFIER_assert_#in~cond| 0) .cse4) (and (= |c___VERIFIER_assert_#in~cond| 1) (not .cse4)))))))) is different from true [2023-11-23 20:40:31,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5617#(and (exists ((|v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~value#1_116| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~size#1_116| Int) (|v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~set#1.offset_113| Int) (|v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_elem_exists_~i~0#1_123| Int) (|v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| Int) (|v_#memory_int_275| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~n~0#1_110| Int) (|v_ULTIMATE.start_elem_exists_~set#1.base_113| Int) (|v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| Int)) (and (or (< |v_ULTIMATE.start_elem_exists_~size#1_116| 1) (= (select (select |v_#memory_int_275| |v_ULTIMATE.start_elem_exists_~set#1.base_113|) |v_ULTIMATE.start_elem_exists_~set#1.offset_113|) |v_ULTIMATE.start_elem_exists_~value#1_116|)) (<= 100000 |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_elem_exists_#res#1_BEFORE_CALL_7| 0) (= |#memory_int| (store |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7| (store (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~n~0#1_110| 4)) (select (select |v_#memory_int_275| |v_ULTIMATE.start_main_~#values~0#1.base_BEFORE_CALL_7|) (+ (- 4) |v_ULTIMATE.start_main_~#values~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~v~0#1_BEFORE_CALL_7| 4)))))) (= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| (+ |v_ULTIMATE.start_main_~n~0#1_110| 1)) (<= 2 |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7|) (= |v_ULTIMATE.start_elem_exists_~i~0#1_123| 0) (<= |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7| 2147483647) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7|) (select (select |#memory_int| |v_ULTIMATE.start_main_~#set~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#set~0#1.offset_BEFORE_CALL_7| 4))) (= |v_ULTIMATE.start_main_~n~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_insert_#res#1_BEFORE_CALL_7|))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 20:40:31,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:40:31,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:40:31,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-23 20:40:31,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081407717] [2023-11-23 20:40:31,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:40:31,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-23 20:40:31,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:40:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-23 20:40:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5576, Invalid=7075, Unknown=9, NotChecked=222, Total=12882 [2023-11-23 20:40:31,302 INFO L87 Difference]: Start difference. First operand 137 states and 168 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)