./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff 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_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2b375ae29a973823eea93f22f40d893acb563fa864c4860e04525925a120d938 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:14,321 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:14,453 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-19 05:17:14,458 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:14,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:14,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:14,482 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:14,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:14,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:14,484 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:14,485 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:14,486 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:14,486 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:14,487 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:14,487 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:14,488 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:14,488 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:14,489 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:14,489 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:14,490 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:14,490 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:14,491 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:14,492 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:14,492 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:14,493 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:17:14,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:14,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:17:14,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:14,494 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:14,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:14,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:14,496 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 05:17:14,496 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:17:14,496 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:17:14,496 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:14,497 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:14,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:14,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:14,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:14,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:14,498 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:14,498 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:14,498 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:14,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:14,499 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:14,499 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:14,499 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:14,499 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_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b375ae29a973823eea93f22f40d893acb563fa864c4860e04525925a120d938 [2023-11-19 05:17:14,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:14,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:14,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:14,855 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:14,856 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:14,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c [2023-11-19 05:17:17,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:18,217 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:18,218 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/sv-benchmarks/c/recursified_nla-digbench/recursified_ps6-ll.c [2023-11-19 05:17:18,229 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/data/5d9bf8c80/0233d57f41f04adb9a08900f3b8cccb3/FLAG47df25b24 [2023-11-19 05:17:18,247 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/data/5d9bf8c80/0233d57f41f04adb9a08900f3b8cccb3 [2023-11-19 05:17:18,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:18,257 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:18,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:18,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:18,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:18,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63857ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18, skipping insertion in model container [2023-11-19 05:17:18,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,304 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:18,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:18,543 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:18,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:18,587 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:18,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18 WrapperNode [2023-11-19 05:17:18,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:18,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:18,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:18,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:18,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,607 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,637 INFO L138 Inliner]: procedures = 16, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 143 [2023-11-19 05:17:18,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:18,638 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:18,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:18,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:18,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,656 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,675 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,685 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,688 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,694 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:18,695 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:18,695 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:18,695 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:18,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (1/1) ... [2023-11-19 05:17:18,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:18,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:18,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:18,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:17:18,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:17:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:18,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:17:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 05:17:18,815 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 05:17:18,815 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_35_0 [2023-11-19 05:17:18,815 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_35_0 [2023-11-19 05:17:18,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:17:18,908 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:18,910 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:19,812 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:19,888 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:19,888 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 05:17:19,898 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:19 BoogieIcfgContainer [2023-11-19 05:17:19,898 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:19,902 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:19,902 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:19,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:19,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:18" (1/3) ... [2023-11-19 05:17:19,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bbe420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:19, skipping insertion in model container [2023-11-19 05:17:19,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:18" (2/3) ... [2023-11-19 05:17:19,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21bbe420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:19, skipping insertion in model container [2023-11-19 05:17:19,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:19" (3/3) ... [2023-11-19 05:17:19,910 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps6-ll.c [2023-11-19 05:17:19,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:19,930 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 102 error locations. [2023-11-19 05:17:19,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:19,999 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;@6b86c549, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:19,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 102 error locations. [2023-11-19 05:17:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 222 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 215 states have internal predecessors, (216), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 05:17:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 05:17:20,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:20,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 05:17:20,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_27_to_35_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:20,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash 282779244, now seen corresponding path program 1 times [2023-11-19 05:17:20,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:20,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488676364] [2023-11-19 05:17:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:20,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:20,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:20,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488676364] [2023-11-19 05:17:20,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488676364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:20,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:20,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:21,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153631571] [2023-11-19 05:17:21,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:21,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:21,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:21,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:21,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:21,053 INFO L87 Difference]: Start difference. First operand has 222 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 215 states have internal predecessors, (216), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-11-19 05:17:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:21,667 INFO L93 Difference]: Finished difference Result 516 states and 526 transitions. [2023-11-19 05:17:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 5 [2023-11-19 05:17:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:21,685 INFO L225 Difference]: With dead ends: 516 [2023-11-19 05:17:21,685 INFO L226 Difference]: Without dead ends: 397 [2023-11-19 05:17:21,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:21,695 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 327 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:21,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 807 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:17:21,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2023-11-19 05:17:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 268. [2023-11-19 05:17:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.8417721518987342) internal successors, (291), 260 states have internal predecessors, (291), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:17:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 302 transitions. [2023-11-19 05:17:21,789 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 302 transitions. Word has length 5 [2023-11-19 05:17:21,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:21,789 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 302 transitions. [2023-11-19 05:17:21,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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) [2023-11-19 05:17:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 302 transitions. [2023-11-19 05:17:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:17:21,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:21,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:21,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:17:21,791 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_27_to_35_0Err12ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:21,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash 167032, now seen corresponding path program 1 times [2023-11-19 05:17:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:21,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405451786] [2023-11-19 05:17:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:21,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:21,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585422481] [2023-11-19 05:17:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:21,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:21,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:21,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:21,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:17:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:21,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 05:17:21,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:17:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 05:17:22,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:17:22,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:17:22,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2023-11-19 05:17:22,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-19 05:17:22,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 05:17:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 05:17:22,342 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-19 05:17:22,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-19 05:17:22,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:22,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-19 05:17:22,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:17:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:22,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:22,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405451786] [2023-11-19 05:17:22,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:22,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585422481] [2023-11-19 05:17:22,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585422481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:22,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:22,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418536337] [2023-11-19 05:17:22,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:22,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:22,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:22,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:22,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:22,444 INFO L87 Difference]: Start difference. First operand 268 states and 302 transitions. Second operand has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-19 05:17:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:23,137 INFO L93 Difference]: Finished difference Result 397 states and 401 transitions. [2023-11-19 05:17:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:17:23,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 17 [2023-11-19 05:17:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:23,142 INFO L225 Difference]: With dead ends: 397 [2023-11-19 05:17:23,142 INFO L226 Difference]: Without dead ends: 396 [2023-11-19 05:17:23,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:23,149 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 299 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:23,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 777 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:17:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2023-11-19 05:17:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 268. [2023-11-19 05:17:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.8354430379746836) internal successors, (290), 260 states have internal predecessors, (290), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:17:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 301 transitions. [2023-11-19 05:17:23,192 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 301 transitions. Word has length 17 [2023-11-19 05:17:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:23,193 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 301 transitions. [2023-11-19 05:17:23,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-11-19 05:17:23,193 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 301 transitions. [2023-11-19 05:17:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 05:17:23,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:23,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:23,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:23,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_27_to_35_0Err13ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:23,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash 5178176, now seen corresponding path program 1 times [2023-11-19 05:17:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474805504] [2023-11-19 05:17:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:23,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:23,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333653443] [2023-11-19 05:17:23,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:23,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:23,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:23,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:23,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:17:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:23,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 05:17:23,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:23,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:23,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:23,643 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-19 05:17:23,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-19 05:17:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:23,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2023-11-19 05:17:23,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:23,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:23,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:23,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:23,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2023-11-19 05:17:23,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 05:17:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,041 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2023-11-19 05:17:24,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 65 [2023-11-19 05:17:24,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:17:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:24,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:24,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474805504] [2023-11-19 05:17:24,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333653443] [2023-11-19 05:17:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333653443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:24,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:24,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477843168] [2023-11-19 05:17:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:24,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:24,130 INFO L87 Difference]: Start difference. First operand 268 states and 301 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-11-19 05:17:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:24,511 INFO L93 Difference]: Finished difference Result 396 states and 400 transitions. [2023-11-19 05:17:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:17:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 18 [2023-11-19 05:17:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:24,514 INFO L225 Difference]: With dead ends: 396 [2023-11-19 05:17:24,514 INFO L226 Difference]: Without dead ends: 395 [2023-11-19 05:17:24,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:24,516 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 295 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:24,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 779 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-19 05:17:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 268. [2023-11-19 05:17:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.8291139240506329) internal successors, (289), 260 states have internal predecessors, (289), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:17:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 300 transitions. [2023-11-19 05:17:24,539 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 300 transitions. Word has length 18 [2023-11-19 05:17:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:24,540 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 300 transitions. [2023-11-19 05:17:24,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-11-19 05:17:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 300 transitions. [2023-11-19 05:17:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:17:24,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:24,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:24,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:24,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:24,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting func_to_recursive_line_27_to_35_0Err14ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:24,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash 160523642, now seen corresponding path program 1 times [2023-11-19 05:17:24,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:24,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515095866] [2023-11-19 05:17:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:24,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:24,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:24,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450633928] [2023-11-19 05:17:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:24,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:24,783 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:24,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:17:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:24,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 05:17:24,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:17:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-19 05:17:24,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 05:17:24,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:17:24,978 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:24,979 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:24,990 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-19 05:17:24,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-19 05:17:24,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:24,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:25,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-19 05:17:25,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:25,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-19 05:17:25,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:25,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:25,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 05:17:25,044 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:25,045 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:25,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:25,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:25,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515095866] [2023-11-19 05:17:25,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:25,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450633928] [2023-11-19 05:17:25,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450633928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:25,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:25,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:25,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495609572] [2023-11-19 05:17:25,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:25,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:25,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:25,111 INFO L87 Difference]: Start difference. First operand 268 states and 300 transitions. Second operand has 6 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-19 05:17:25,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:25,445 INFO L93 Difference]: Finished difference Result 395 states and 399 transitions. [2023-11-19 05:17:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:25,446 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 19 [2023-11-19 05:17:25,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:25,448 INFO L225 Difference]: With dead ends: 395 [2023-11-19 05:17:25,448 INFO L226 Difference]: Without dead ends: 387 [2023-11-19 05:17:25,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:25,450 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 270 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:25,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 795 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-19 05:17:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 268. [2023-11-19 05:17:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.7784810126582278) internal successors, (281), 260 states have internal predecessors, (281), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:17:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 292 transitions. [2023-11-19 05:17:25,463 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 292 transitions. Word has length 19 [2023-11-19 05:17:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:25,464 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 292 transitions. [2023-11-19 05:17:25,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-11-19 05:17:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 292 transitions. [2023-11-19 05:17:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 05:17:25,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:25,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:25,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:25,685 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_27_to_35_0Err22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:25,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:25,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1877121410, now seen corresponding path program 1 times [2023-11-19 05:17:25,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:25,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682056561] [2023-11-19 05:17:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:25,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:25,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261842550] [2023-11-19 05:17:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:25,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:25,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:25,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:25,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:17:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:25,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:17:25,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:25,863 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-11-19 05:17:25,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-11-19 05:17:25,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-19 05:17:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:25,909 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-11-19 05:17:25,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-11-19 05:17:25,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-19 05:17:25,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:25,964 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-11-19 05:17:25,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 22 [2023-11-19 05:17:26,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:26,046 INFO L349 Elim1Store]: treesize reduction 109, result has 12.1 percent of original size [2023-11-19 05:17:26,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 22 [2023-11-19 05:17:26,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2023-11-19 05:17:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:27,491 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:27,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:27,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682056561] [2023-11-19 05:17:27,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:27,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261842550] [2023-11-19 05:17:27,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261842550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:27,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:27,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 05:17:27,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60166316] [2023-11-19 05:17:27,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:27,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:17:27,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:27,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:17:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:27,495 INFO L87 Difference]: Start difference. First operand 268 states and 292 transitions. Second operand has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2023-11-19 05:17:28,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:28,893 INFO L93 Difference]: Finished difference Result 387 states and 391 transitions. [2023-11-19 05:17:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:17:28,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 27 [2023-11-19 05:17:28,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:28,896 INFO L225 Difference]: With dead ends: 387 [2023-11-19 05:17:28,896 INFO L226 Difference]: Without dead ends: 386 [2023-11-19 05:17:28,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:17:28,898 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 262 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:28,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 909 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:17:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-11-19 05:17:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 268. [2023-11-19 05:17:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.7721518987341771) internal successors, (280), 260 states have internal predecessors, (280), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:17:28,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 291 transitions. [2023-11-19 05:17:28,911 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 291 transitions. Word has length 27 [2023-11-19 05:17:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:28,911 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 291 transitions. [2023-11-19 05:17:28,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2023-11-19 05:17:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 291 transitions. [2023-11-19 05:17:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 05:17:28,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:28,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:28,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:29,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:29,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_27_to_35_0Err23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:29,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1938778230, now seen corresponding path program 1 times [2023-11-19 05:17:29,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:29,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154835305] [2023-11-19 05:17:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:29,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:29,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678915849] [2023-11-19 05:17:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:29,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:29,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:29,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:29,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:17:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:29,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-19 05:17:29,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:29,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:30,913 INFO L349 Elim1Store]: treesize reduction 509, result has 32.8 percent of original size [2023-11-19 05:17:30,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 7 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 760 treesize of output 1090 [2023-11-19 05:17:31,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-19 05:17:31,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 05:17:31,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 05:17:32,361 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:32,373 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:32,478 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:32,579 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:32,600 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:32,604 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:32,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:32,838 INFO L224 Elim1Store]: Index analysis took 649 ms [2023-11-19 05:17:32,984 INFO L349 Elim1Store]: treesize reduction 144, result has 10.6 percent of original size [2023-11-19 05:17:32,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 26 case distinctions, treesize of input 246 treesize of output 461 [2023-11-19 05:17:33,290 WARN L200 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:17:33,588 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,606 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,674 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,750 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,807 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,808 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,811 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:33,865 INFO L224 Elim1Store]: Index analysis took 290 ms [2023-11-19 05:17:33,945 INFO L349 Elim1Store]: treesize reduction 73, result has 9.9 percent of original size [2023-11-19 05:17:33,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 13 case distinctions, treesize of input 237 treesize of output 446 [2023-11-19 05:17:34,301 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,477 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,642 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,721 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,848 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,853 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:34,853 INFO L224 Elim1Store]: Index analysis took 570 ms [2023-11-19 05:17:34,912 INFO L349 Elim1Store]: treesize reduction 141, result has 5.4 percent of original size [2023-11-19 05:17:34,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 24 case distinctions, treesize of input 237 treesize of output 446 [2023-11-19 05:17:35,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2023-11-19 05:17:36,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2023-11-19 05:17:37,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2023-11-19 05:17:39,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 1609 treesize of output 1603 [2023-11-19 05:17:41,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:41,092 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:41,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:41,344 INFO L224 Elim1Store]: Index analysis took 288 ms [2023-11-19 05:17:41,621 INFO L349 Elim1Store]: treesize reduction 292, result has 7.9 percent of original size [2023-11-19 05:17:41,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 29 case distinctions, treesize of input 572 treesize of output 628 [2023-11-19 05:17:42,661 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,667 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,680 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,688 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,695 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,707 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,715 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,716 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 161 [2023-11-19 05:17:42,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,989 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:42,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,001 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,013 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,016 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,021 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,024 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,025 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 152 [2023-11-19 05:17:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,177 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:43,260 INFO L224 Elim1Store]: Index analysis took 156 ms [2023-11-19 05:17:43,335 INFO L349 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2023-11-19 05:17:43,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 18 case distinctions, treesize of input 484 treesize of output 534 [2023-11-19 05:17:44,166 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,176 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,180 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,204 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,271 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,274 INFO L224 Elim1Store]: Index analysis took 116 ms [2023-11-19 05:17:44,313 INFO L349 Elim1Store]: treesize reduction 105, result has 7.1 percent of original size [2023-11-19 05:17:44,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 18 case distinctions, treesize of input 307 treesize of output 353 [2023-11-19 05:17:44,774 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,817 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,835 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:44,891 INFO L349 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2023-11-19 05:17:44,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 14 case distinctions, treesize of input 300 treesize of output 308 [2023-11-19 05:17:45,077 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,101 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,107 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,110 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,115 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2023-11-19 05:17:45,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,451 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,466 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,468 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,470 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,472 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,474 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,476 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,481 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 93 [2023-11-19 05:17:45,576 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,577 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,578 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,579 WARN L200 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:17:45,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,788 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,796 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,802 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,805 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2023-11-19 05:17:45,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,945 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,958 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,960 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,962 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,964 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:45,968 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:45,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2023-11-19 05:17:46,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:46,303 INFO L224 Elim1Store]: Index analysis took 109 ms [2023-11-19 05:17:46,437 INFO L349 Elim1Store]: treesize reduction 231, result has 6.9 percent of original size [2023-11-19 05:17:46,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 23 case distinctions, treesize of input 7048 treesize of output 6400 [2023-11-19 05:17:51,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:51,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 145 [2023-11-19 05:17:51,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:51,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2023-11-19 05:17:52,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:52,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 29 [2023-11-19 05:17:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:52,198 INFO L349 Elim1Store]: treesize reduction 97, result has 27.1 percent of original size [2023-11-19 05:17:52,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 445 treesize of output 450 [2023-11-19 05:17:52,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:52,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:52,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2023-11-19 05:17:52,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:52,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2023-11-19 05:17:53,061 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:53,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 19 [2023-11-19 05:17:53,136 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:53,144 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:53,151 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-19 05:17:53,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 24 [2023-11-19 05:17:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:53,184 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:53,192 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-11-19 05:17:53,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 24 [2023-11-19 05:17:53,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:53,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-19 05:17:53,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-19 05:17:53,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:53,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-19 05:17:53,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 5 [2023-11-19 05:17:53,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:53,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2023-11-19 05:17:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:53,686 INFO L349 Elim1Store]: treesize reduction 1172, result has 0.1 percent of original size [2023-11-19 05:17:53,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 46 case distinctions, treesize of input 455 treesize of output 547 [2023-11-19 05:17:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:54,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:54,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:54,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154835305] [2023-11-19 05:17:54,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:54,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678915849] [2023-11-19 05:17:54,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678915849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:54,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:54,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-19 05:17:54,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785061404] [2023-11-19 05:17:54,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:54,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:17:54,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:17:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:17:54,386 INFO L87 Difference]: Start difference. First operand 268 states and 291 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2023-11-19 05:17:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:55,458 INFO L93 Difference]: Finished difference Result 386 states and 390 transitions. [2023-11-19 05:17:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:17:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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 28 [2023-11-19 05:17:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:55,461 INFO L225 Difference]: With dead ends: 386 [2023-11-19 05:17:55,461 INFO L226 Difference]: Without dead ends: 385 [2023-11-19 05:17:55,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2023-11-19 05:17:55,463 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 329 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:55,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1201 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:17:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-11-19 05:17:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 268. [2023-11-19 05:17:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 158 states have (on average 1.7658227848101267) internal successors, (279), 260 states have internal predecessors, (279), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-19 05:17:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2023-11-19 05:17:55,480 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 28 [2023-11-19 05:17:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:55,480 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2023-11-19 05:17:55,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 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) [2023-11-19 05:17:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2023-11-19 05:17:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 05:17:55,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:55,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:55,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:55,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:55,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_27_to_35_0Err24ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:55,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash 27417220, now seen corresponding path program 1 times [2023-11-19 05:17:55,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:55,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204174029] [2023-11-19 05:17:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:55,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:55,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:55,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344731532] [2023-11-19 05:17:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:55,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:55,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:55,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:17:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:55,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:17:55,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:55,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-19 05:17:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:55,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:55,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204174029] [2023-11-19 05:17:55,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344731532] [2023-11-19 05:17:55,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344731532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:55,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:55,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710441366] [2023-11-19 05:17:55,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:55,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:17:55,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:17:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:55,879 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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) [2023-11-19 05:17:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:56,293 INFO L93 Difference]: Finished difference Result 270 states and 292 transitions. [2023-11-19 05:17:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:56,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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 29 [2023-11-19 05:17:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:56,297 INFO L225 Difference]: With dead ends: 270 [2023-11-19 05:17:56,297 INFO L226 Difference]: Without dead ends: 269 [2023-11-19 05:17:56,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:56,298 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 148 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:56,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 553 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:17:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-19 05:17:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-11-19 05:17:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 159 states have (on average 1.748427672955975) internal successors, (278), 260 states have internal predecessors, (278), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:17:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 290 transitions. [2023-11-19 05:17:56,314 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 290 transitions. Word has length 29 [2023-11-19 05:17:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:56,315 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 290 transitions. [2023-11-19 05:17:56,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 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) [2023-11-19 05:17:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 290 transitions. [2023-11-19 05:17:56,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:17:56,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:56,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:56,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:56,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:56,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting func_to_recursive_line_27_to_35_0Err25ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:56,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:56,535 INFO L85 PathProgramCache]: Analyzing trace with hash 849934028, now seen corresponding path program 1 times [2023-11-19 05:17:56,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:56,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208124945] [2023-11-19 05:17:56,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:56,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:56,552 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:56,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241734946] [2023-11-19 05:17:56,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:56,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:56,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:56,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:17:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:56,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:17:56,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:56,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-19 05:17:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:56,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:56,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208124945] [2023-11-19 05:17:56,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:56,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241734946] [2023-11-19 05:17:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241734946] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:56,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420170365] [2023-11-19 05:17:56,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:56,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 05:17:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:56,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 05:17:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:17:56,691 INFO L87 Difference]: Start difference. First operand 269 states and 290 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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) [2023-11-19 05:17:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:57,047 INFO L93 Difference]: Finished difference Result 269 states and 290 transitions. [2023-11-19 05:17:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:57,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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 30 [2023-11-19 05:17:57,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:57,050 INFO L225 Difference]: With dead ends: 269 [2023-11-19 05:17:57,050 INFO L226 Difference]: Without dead ends: 268 [2023-11-19 05:17:57,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:57,051 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 142 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:57,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 553 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:57,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-19 05:17:57,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2023-11-19 05:17:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 259 states have internal predecessors, (276), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:17:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 288 transitions. [2023-11-19 05:17:57,065 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 288 transitions. Word has length 30 [2023-11-19 05:17:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:57,065 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 288 transitions. [2023-11-19 05:17:57,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 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) [2023-11-19 05:17:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 288 transitions. [2023-11-19 05:17:57,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:17:57,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:57,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:57,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:57,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:57,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_27_to_35_0Err26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:57,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash 578151302, now seen corresponding path program 1 times [2023-11-19 05:17:57,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:57,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134075113] [2023-11-19 05:17:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:57,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:57,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1819898759] [2023-11-19 05:17:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:57,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:57,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:57,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:57,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:17:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:57,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 05:17:57,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:57,450 INFO L349 Elim1Store]: treesize reduction 40, result has 35.5 percent of original size [2023-11-19 05:17:57,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 45 [2023-11-19 05:17:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:57,504 INFO L349 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2023-11-19 05:17:57,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 62 [2023-11-19 05:17:57,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:17:57,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1397 treesize of output 1371 [2023-11-19 05:17:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:57,747 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:57,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134075113] [2023-11-19 05:17:57,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:57,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819898759] [2023-11-19 05:17:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819898759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:57,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:57,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:17:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828632140] [2023-11-19 05:17:57,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:57,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:17:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:17:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:17:57,750 INFO L87 Difference]: Start difference. First operand 268 states and 288 transitions. Second operand has 6 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-11-19 05:17:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:58,073 INFO L93 Difference]: Finished difference Result 383 states and 387 transitions. [2023-11-19 05:17:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:17:58,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 31 [2023-11-19 05:17:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:58,076 INFO L225 Difference]: With dead ends: 383 [2023-11-19 05:17:58,076 INFO L226 Difference]: Without dead ends: 377 [2023-11-19 05:17:58,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:58,077 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 216 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:58,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 798 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-11-19 05:17:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 268. [2023-11-19 05:17:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6981132075471699) internal successors, (270), 259 states have internal predecessors, (270), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:17:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 282 transitions. [2023-11-19 05:17:58,092 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 282 transitions. Word has length 31 [2023-11-19 05:17:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:58,092 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 282 transitions. [2023-11-19 05:17:58,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-11-19 05:17:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 282 transitions. [2023-11-19 05:17:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 05:17:58,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:58,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:58,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:58,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:58,316 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting func_to_recursive_line_27_to_35_0Err32ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:58,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:58,316 INFO L85 PathProgramCache]: Analyzing trace with hash 62074508, now seen corresponding path program 1 times [2023-11-19 05:17:58,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:58,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213087610] [2023-11-19 05:17:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:58,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:58,334 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:58,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218303614] [2023-11-19 05:17:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:58,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:58,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:58,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:58,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:17:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:58,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-19 05:17:58,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:58,469 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-19 05:17:58,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 27 [2023-11-19 05:17:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-19 05:17:58,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 05:17:58,486 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-19 05:17:58,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-19 05:17:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-19 05:17:58,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-19 05:17:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:17:58,518 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:58,518 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:58,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 05:17:58,545 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:58,546 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:58,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-19 05:17:58,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 17 [2023-11-19 05:17:58,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:17:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:17:58,589 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:17:58,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-19 05:17:58,603 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:58,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:58,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:17:58,617 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:17:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:58,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:58,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:58,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213087610] [2023-11-19 05:17:58,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:17:58,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218303614] [2023-11-19 05:17:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218303614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:58,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:58,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:17:58,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170101652] [2023-11-19 05:17:58,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:58,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:17:58,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:17:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:17:58,799 INFO L87 Difference]: Start difference. First operand 268 states and 282 transitions. Second operand has 8 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-19 05:17:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:59,152 INFO L93 Difference]: Finished difference Result 377 states and 381 transitions. [2023-11-19 05:17:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:17:59,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 37 [2023-11-19 05:17:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:59,155 INFO L225 Difference]: With dead ends: 377 [2023-11-19 05:17:59,155 INFO L226 Difference]: Without dead ends: 375 [2023-11-19 05:17:59,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:17:59,156 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 219 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:59,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 821 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-19 05:17:59,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 268. [2023-11-19 05:17:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6855345911949686) internal successors, (268), 259 states have internal predecessors, (268), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:17:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 280 transitions. [2023-11-19 05:17:59,176 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 280 transitions. Word has length 37 [2023-11-19 05:17:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:59,176 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 280 transitions. [2023-11-19 05:17:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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) [2023-11-19 05:17:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 280 transitions. [2023-11-19 05:17:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 05:17:59,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:59,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:59,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:59,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:17:59,388 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_27_to_35_0Err34ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:17:59,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash -475932786, now seen corresponding path program 1 times [2023-11-19 05:17:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569125731] [2023-11-19 05:17:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:59,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:17:59,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974471455] [2023-11-19 05:17:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:59,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:59,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:59,405 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:59,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 05:17:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:59,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 05:17:59,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:59,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:59,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:59,586 INFO L349 Elim1Store]: treesize reduction 92, result has 25.2 percent of original size [2023-11-19 05:17:59,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 114 [2023-11-19 05:17:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:59,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-11-19 05:17:59,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:59,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:59,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:59,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:59,808 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:17:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:59,878 INFO L349 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2023-11-19 05:17:59,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 89 [2023-11-19 05:17:59,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:59,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2023-11-19 05:17:59,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:17:59,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:17:59,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:17:59,982 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:18:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:01,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:01,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:01,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569125731] [2023-11-19 05:18:01,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:01,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974471455] [2023-11-19 05:18:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974471455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:01,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:01,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:18:01,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779127832] [2023-11-19 05:18:01,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:01,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:18:01,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:01,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:18:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:18:01,223 INFO L87 Difference]: Start difference. First operand 268 states and 280 transitions. Second operand has 6 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2023-11-19 05:18:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:01,813 INFO L93 Difference]: Finished difference Result 276 states and 280 transitions. [2023-11-19 05:18:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:18:01,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 39 [2023-11-19 05:18:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:01,816 INFO L225 Difference]: With dead ends: 276 [2023-11-19 05:18:01,816 INFO L226 Difference]: Without dead ends: 274 [2023-11-19 05:18:01,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2023-11-19 05:18:01,817 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 79 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:01,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 872 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 2 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:18:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2023-11-19 05:18:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2023-11-19 05:18:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6729559748427674) internal successors, (266), 259 states have internal predecessors, (266), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:18:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 278 transitions. [2023-11-19 05:18:01,832 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 278 transitions. Word has length 39 [2023-11-19 05:18:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:01,834 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 278 transitions. [2023-11-19 05:18:01,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2023-11-19 05:18:01,834 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 278 transitions. [2023-11-19 05:18:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 05:18:01,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:01,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:01,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:02,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:18:02,055 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_27_to_35_0Err36ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:18:02,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2104866672, now seen corresponding path program 1 times [2023-11-19 05:18:02,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:02,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571995955] [2023-11-19 05:18:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:02,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:02,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168893595] [2023-11-19 05:18:02,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:02,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:02,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:02,072 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:02,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 05:18:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:02,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 05:18:02,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-19 05:18:02,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 05:18:02,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:18:02,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-19 05:18:02,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 05:18:02,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:18:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 05:18:02,290 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:02,291 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:02,292 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:02,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:18:02,305 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:02,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:18:02,326 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:02,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-19 05:18:02,343 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-19 05:18:02,352 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-19 05:18:02,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-11-19 05:18:02,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 05:18:02,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 05:18:02,374 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-19 05:18:02,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-19 05:18:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:02,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-19 05:18:02,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-19 05:18:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:02,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:02,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571995955] [2023-11-19 05:18:02,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168893595] [2023-11-19 05:18:02,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168893595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:02,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:02,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:18:02,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035442507] [2023-11-19 05:18:02,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:02,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:18:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:02,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:18:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:18:02,650 INFO L87 Difference]: Start difference. First operand 268 states and 278 transitions. Second operand has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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) [2023-11-19 05:18:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:18:03,415 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2023-11-19 05:18:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:18:03,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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 41 [2023-11-19 05:18:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:18:03,418 INFO L225 Difference]: With dead ends: 373 [2023-11-19 05:18:03,418 INFO L226 Difference]: Without dead ends: 372 [2023-11-19 05:18:03,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:18:03,419 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 195 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:18:03,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 785 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:18:03,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-11-19 05:18:03,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 268. [2023-11-19 05:18:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 259 states have internal predecessors, (265), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 05:18:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2023-11-19 05:18:03,434 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 41 [2023-11-19 05:18:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:18:03,434 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2023-11-19 05:18:03,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 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) [2023-11-19 05:18:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2023-11-19 05:18:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 05:18:03,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:18:03,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:18:03,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 05:18:03,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 05:18:03,652 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting func_to_recursive_line_27_to_35_0Err37ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 99 more)] === [2023-11-19 05:18:03,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:18:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash -826357160, now seen corresponding path program 1 times [2023-11-19 05:18:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:18:03,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126523553] [2023-11-19 05:18:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:18:03,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 05:18:03,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39106402] [2023-11-19 05:18:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:18:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:18:03,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:18:03,680 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:18:03,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84568229-cd90-4ef7-915c-deb3b288af49/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 05:18:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:18:03,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:18:03,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:18:03,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:18:03,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-11-19 05:18:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-19 05:18:03,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-19 05:18:03,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2023-11-19 05:18:03,864 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:03,865 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:03,874 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-19 05:18:03,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2023-11-19 05:18:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-19 05:18:03,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-19 05:18:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:03,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 42 [2023-11-19 05:18:03,930 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:03,931 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:03,931 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 05:18:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:18:04,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:18:04,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:18:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126523553] [2023-11-19 05:18:04,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 05:18:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39106402] [2023-11-19 05:18:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39106402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:18:04,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:18:04,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:18:04,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066372145] [2023-11-19 05:18:04,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:18:04,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:18:04,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:18:04,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:18:04,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:18:04,167 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand has 8 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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)