./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_freire1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc 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_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_freire1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91 --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 802be743cfa79430fe29fdc090ef145d830f22b73f5bbaa3ca042d397672c148 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:48:47,510 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:48:47,640 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:48:47,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:48:47,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:48:47,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:48:47,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:48:47,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:48:47,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:48:47,696 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:48:47,696 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:48:47,697 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:48:47,697 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:48:47,699 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:48:47,700 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:48:47,700 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:48:47,701 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:48:47,701 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:48:47,702 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:48:47,702 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:48:47,703 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:48:47,704 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:48:47,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:48:47,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:48:47,706 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:48:47,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:48:47,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:48:47,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:48:47,708 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:48:47,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:48:47,709 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:48:47,710 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:48:47,710 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:48:47,710 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:48:47,711 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:48:47,711 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:48:47,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:48:47,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:48:47,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:48:47,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:48:47,713 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:48:47,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:48:47,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:48:47,714 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:48:47,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:48:47,715 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:48:47,715 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:48:47,715 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:48:47,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:48:47,716 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_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 802be743cfa79430fe29fdc090ef145d830f22b73f5bbaa3ca042d397672c148 [2023-11-24 23:48:48,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:48:48,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:48:48,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:48:48,091 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:48:48,092 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:48:48,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/recursified_nla-digbench/recursified_freire1.c [2023-11-24 23:48:51,231 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:48:51,468 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:48:51,469 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/sv-benchmarks/c/recursified_nla-digbench/recursified_freire1.c [2023-11-24 23:48:51,477 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/data/781534fcb/c51d76d7b90449e39a6de7a03a889778/FLAGe40e68243 [2023-11-24 23:48:51,493 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/data/781534fcb/c51d76d7b90449e39a6de7a03a889778 [2023-11-24 23:48:51,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:48:51,498 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:48:51,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:48:51,500 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:48:51,506 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:48:51,506 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54db775d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51, skipping insertion in model container [2023-11-24 23:48:51,508 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,531 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:48:51,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:48:51,772 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:48:51,791 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:48:51,806 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:48:51,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51 WrapperNode [2023-11-24 23:48:51,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:48:51,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:48:51,808 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:48:51,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:48:51,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,844 INFO L138 Inliner]: procedures = 18, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2023-11-24 23:48:51,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:48:51,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:48:51,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:48:51,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:48:51,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,859 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,859 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,869 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,871 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,878 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:48:51,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:48:51,879 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:48:51,884 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:48:51,885 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (1/1) ... [2023-11-24 23:48:51,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:48:51,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:51,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:48:51,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:48:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:48:51,950 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_32_0 [2023-11-24 23:48:51,951 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_32_0 [2023-11-24 23:48:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:48:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:48:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:48:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-24 23:48:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-24 23:48:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:48:51,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:48:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:48:51,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:48:51,952 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:48:51,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:48:52,031 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:48:52,034 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:48:52,238 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:48:52,288 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:48:52,292 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:48:52,294 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:48:52 BoogieIcfgContainer [2023-11-24 23:48:52,294 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:48:52,297 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:48:52,297 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:48:52,300 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:48:52,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:48:51" (1/3) ... [2023-11-24 23:48:52,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e16b4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:48:52, skipping insertion in model container [2023-11-24 23:48:52,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:48:51" (2/3) ... [2023-11-24 23:48:52,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e16b4c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:48:52, skipping insertion in model container [2023-11-24 23:48:52,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:48:52" (3/3) ... [2023-11-24 23:48:52,304 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_freire1.c [2023-11-24 23:48:52,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:48:52,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-24 23:48:52,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:48:52,371 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;@5d86bd7f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:48:52,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-24 23:48:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:48:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:48:52,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:52,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:48:52,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:52,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash 82848868, now seen corresponding path program 1 times [2023-11-24 23:48:52,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:52,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492171614] [2023-11-24 23:48:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:52,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:52,522 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636893354] [2023-11-24 23:48:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:52,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:52,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:52,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:52,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:48:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:52,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 23:48:52,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:52,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:48:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:52,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:48:52,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492171614] [2023-11-24 23:48:52,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:48:52,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636893354] [2023-11-24 23:48:52,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636893354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:52,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:52,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:48:52,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759476793] [2023-11-24 23:48:52,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:48:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:52,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:48:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:48:52,978 INFO L87 Difference]: Start difference. First operand has 28 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 22 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-11-24 23:48:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:53,212 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2023-11-24 23:48:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:48:53,215 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 [2023-11-24 23:48:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:53,223 INFO L225 Difference]: With dead ends: 58 [2023-11-24 23:48:53,223 INFO L226 Difference]: Without dead ends: 39 [2023-11-24 23:48:53,228 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 [2023-11-24 23:48:53,234 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:53,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 74 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:48:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-24 23:48:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2023-11-24 23:48:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 27 states have internal predecessors, (28), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-24 23:48:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-11-24 23:48:53,294 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 5 [2023-11-24 23:48:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:53,294 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-11-24 23:48:53,294 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) [2023-11-24 23:48:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-11-24 23:48:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:48:53,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:53,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:48:53,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:48:53,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:48:53,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_0_to_32_0Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:53,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:53,504 INFO L85 PathProgramCache]: Analyzing trace with hash 102947689, now seen corresponding path program 1 times [2023-11-24 23:48:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:53,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395489325] [2023-11-24 23:48:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:53,588 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:53,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321620744] [2023-11-24 23:48:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:53,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:53,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:53,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:48:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:53,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 23:48:53,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:53,775 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 14 treesize of output 12 [2023-11-24 23:48:53,793 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:48:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:48:54,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-11-24 23:48:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:54,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:48:54,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:54,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395489325] [2023-11-24 23:48:54,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:48:54,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321620744] [2023-11-24 23:48:54,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321620744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:54,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:54,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:48:54,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489835620] [2023-11-24 23:48:54,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:54,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:48:54,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:54,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:48:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:48:54,064 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 7 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:54,216 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-24 23:48:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:48:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-24 23:48:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:54,219 INFO L225 Difference]: With dead ends: 45 [2023-11-24 23:48:54,220 INFO L226 Difference]: Without dead ends: 44 [2023-11-24 23:48:54,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:48:54,222 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:54,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 51 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:48:54,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-24 23:48:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-11-24 23:48:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 29 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-24 23:48:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-11-24 23:48:54,252 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 12 [2023-11-24 23:48:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:54,253 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-11-24 23:48:54,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-11-24 23:48:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 23:48:54,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:54,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:48:54,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:48:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:54,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_0_to_32_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:54,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1103588890, now seen corresponding path program 1 times [2023-11-24 23:48:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802397785] [2023-11-24 23:48:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:54,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:54,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550062277] [2023-11-24 23:48:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:54,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:54,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:54,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:54,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:48:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:54,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 23:48:54,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:54,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:48:54,617 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 14 treesize of output 12 [2023-11-24 23:48:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:48:54,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-11-24 23:48:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:54,816 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:48:54,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:54,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802397785] [2023-11-24 23:48:54,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:48:54,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550062277] [2023-11-24 23:48:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550062277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:54,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:54,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:48:54,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881162515] [2023-11-24 23:48:54,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:54,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:48:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:48:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:48:54,820 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:54,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:54,966 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-11-24 23:48:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:48:54,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-11-24 23:48:54,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:54,968 INFO L225 Difference]: With dead ends: 44 [2023-11-24 23:48:54,968 INFO L226 Difference]: Without dead ends: 43 [2023-11-24 23:48:54,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:48:54,970 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:54,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 81 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:48:54,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-24 23:48:54,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-24 23:48:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 30 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-24 23:48:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-24 23:48:54,980 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 13 [2023-11-24 23:48:54,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:54,981 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-24 23:48:54,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:54,981 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-24 23:48:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:48:54,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:54,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:48:54,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:48:55,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:55,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:55,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash 307321221, now seen corresponding path program 1 times [2023-11-24 23:48:55,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:55,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909126600] [2023-11-24 23:48:55,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:55,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:55,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789111219] [2023-11-24 23:48:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:55,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:55,238 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:55,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:48:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:55,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:48:55,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:55,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:48:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:55,410 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:48:55,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:55,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909126600] [2023-11-24 23:48:55,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:48:55,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789111219] [2023-11-24 23:48:55,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789111219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:48:55,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:48:55,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:48:55,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979810789] [2023-11-24 23:48:55,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:48:55,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:48:55,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:55,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:48:55,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:48:55,413 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:48:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:55,488 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-24 23:48:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:48:55,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-11-24 23:48:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:55,492 INFO L225 Difference]: With dead ends: 45 [2023-11-24 23:48:55,492 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 23:48:55,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:48:55,494 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:55,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:48:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 23:48:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-24 23:48:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.25) internal successors, (30), 29 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-24 23:48:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-11-24 23:48:55,503 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 15 [2023-11-24 23:48:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:55,503 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-11-24 23:48:55,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:48:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-11-24 23:48:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 23:48:55,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:55,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:48:55,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:48:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:55,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:55,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash -363432523, now seen corresponding path program 1 times [2023-11-24 23:48:55,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:55,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985236478] [2023-11-24 23:48:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:55,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:55,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:55,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773955361] [2023-11-24 23:48:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:55,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:55,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:55,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:55,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:48:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:55,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-24 23:48:55,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:55,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:48:55,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:48:55,916 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 90 treesize of output 92 [2023-11-24 23:48:56,097 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 [2023-11-24 23:48:56,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-24 23:48:56,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-24 23:48:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:56,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:48:56,505 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_228 (Array Int Int)) (|v_func_to_recursive_line_0_to_32_0_#t~mem5_7| Int) (|v_func_to_recursive_line_0_to_32_0_#t~mem4_7| Int)) (let ((.cse0 (+ (select (select (store |c_#memory_int| c_func_to_recursive_line_0_to_32_0_~x.base v_ArrVal_228) c_func_to_recursive_line_0_to_32_0_~r.base) c_func_to_recursive_line_0_to_32_0_~r.offset) 1))) (or (< |v_func_to_recursive_line_0_to_32_0_#t~mem4_7| .cse0) (< 0 (+ 2147483649 (* |v_func_to_recursive_line_0_to_32_0_#t~mem4_7| |v_func_to_recursive_line_0_to_32_0_#t~mem5_7|))) (< |v_func_to_recursive_line_0_to_32_0_#t~mem5_7| .cse0)))) is different from false [2023-11-24 23:48:56,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985236478] [2023-11-24 23:48:56,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:48:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773955361] [2023-11-24 23:48:56,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773955361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:48:56,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599212438] [2023-11-24 23:48:56,589 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:48:56,589 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:48:56,593 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:48:56,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:48:56,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-24 23:48:56,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692277968] [2023-11-24 23:48:56,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:48:56,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 23:48:56,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 23:48:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=145, Unknown=1, NotChecked=24, Total=210 [2023-11-24 23:48:56,597 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:57,001 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-11-24 23:48:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:48:57,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-24 23:48:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:57,003 INFO L225 Difference]: With dead ends: 40 [2023-11-24 23:48:57,003 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 23:48:57,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=320, Unknown=1, NotChecked=38, Total=462 [2023-11-24 23:48:57,005 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:57,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 51 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:48:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 23:48:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-24 23:48:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 27 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-24 23:48:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-11-24 23:48:57,013 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 17 [2023-11-24 23:48:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:57,014 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-11-24 23:48:57,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-11-24 23:48:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 23:48:57,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:57,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:48:57,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:48:57,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:57,224 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:57,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1618493712, now seen corresponding path program 1 times [2023-11-24 23:48:57,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:57,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985204086] [2023-11-24 23:48:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:57,270 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:57,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047281806] [2023-11-24 23:48:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:57,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:57,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:57,275 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:57,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:48:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:57,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 23:48:57,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:57,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:48:57,419 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 14 treesize of output 12 [2023-11-24 23:48:57,562 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 [2023-11-24 23:48:57,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 23:48:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:57,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:48:57,835 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_286 (Array Int Int))) (< (let ((.cse0 (select (select (store |c_#memory_int| c_func_to_recursive_line_0_to_32_0_~x.base v_ArrVal_286) c_func_to_recursive_line_0_to_32_0_~r.base) c_func_to_recursive_line_0_to_32_0_~r.offset))) (+ (* 2 .cse0) (* .cse0 .cse0))) 2147483647)) is different from false [2023-11-24 23:48:57,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985204086] [2023-11-24 23:48:57,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:48:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047281806] [2023-11-24 23:48:57,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047281806] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:48:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174164769] [2023-11-24 23:48:57,862 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:48:57,862 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:48:57,862 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:48:57,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:48:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-24 23:48:57,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444216251] [2023-11-24 23:48:57,865 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:48:57,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 23:48:57,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:57,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 23:48:57,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=147, Unknown=1, NotChecked=24, Total=210 [2023-11-24 23:48:57,867 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:58,112 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-11-24 23:48:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 23:48:58,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-24 23:48:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:58,114 INFO L225 Difference]: With dead ends: 49 [2023-11-24 23:48:58,114 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 23:48:58,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=242, Unknown=1, NotChecked=32, Total=342 [2023-11-24 23:48:58,116 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:58,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 69 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:48:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 23:48:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-24 23:48:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.15625) internal successors, (37), 36 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-24 23:48:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2023-11-24 23:48:58,137 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 18 [2023-11-24 23:48:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:58,137 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2023-11-24 23:48:58,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 23:48:58,138 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2023-11-24 23:48:58,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 23:48:58,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:58,139 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 23:48:58,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 23:48:58,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-24 23:48:58,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting func_to_recursive_line_0_to_32_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:58,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1257044535, now seen corresponding path program 1 times [2023-11-24 23:48:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:58,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236273936] [2023-11-24 23:48:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:58,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:58,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990060527] [2023-11-24 23:48:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:58,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:58,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:58,401 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:58,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 23:48:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:58,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-24 23:48:58,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:58,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:48:58,586 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 90 treesize of output 92 [2023-11-24 23:48:58,628 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 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:48:58,762 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 [2023-11-24 23:48:58,828 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 36 treesize of output 13 [2023-11-24 23:48:58,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:48:58,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2023-11-24 23:48:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:48:59,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:48:59,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:48:59,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236273936] [2023-11-24 23:48:59,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:48:59,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990060527] [2023-11-24 23:48:59,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990060527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:48:59,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662487298] [2023-11-24 23:48:59,073 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:48:59,074 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:48:59,074 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:48:59,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:48:59,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-24 23:48:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073884975] [2023-11-24 23:48:59,076 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:48:59,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:48:59,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:48:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:48:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=110, Unknown=2, NotChecked=0, Total=156 [2023-11-24 23:48:59,078 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:48:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:48:59,312 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-11-24 23:48:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:48:59,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-24 23:48:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:48:59,314 INFO L225 Difference]: With dead ends: 58 [2023-11-24 23:48:59,314 INFO L226 Difference]: Without dead ends: 57 [2023-11-24 23:48:59,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=170, Unknown=2, NotChecked=0, Total=240 [2023-11-24 23:48:59,316 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:48:59,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 82 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:48:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-24 23:48:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2023-11-24 23:48:59,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 39 states have internal predecessors, (40), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-24 23:48:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-11-24 23:48:59,334 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 25 [2023-11-24 23:48:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:48:59,335 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-11-24 23:48:59,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:48:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-11-24 23:48:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 23:48:59,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:48:59,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:48:59,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 23:48:59,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 23:48:59,543 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:48:59,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:48:59,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1812409292, now seen corresponding path program 1 times [2023-11-24 23:48:59,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:48:59,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765845764] [2023-11-24 23:48:59,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:59,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:48:59,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:48:59,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734171244] [2023-11-24 23:48:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:48:59,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:48:59,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:48:59,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:48:59,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 23:48:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:48:59,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 23:48:59,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:48:59,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:48:59,812 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:48:59,813 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 44 treesize of output 48 [2023-11-24 23:48:59,983 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_4 (Array Int Int))) (let ((.cse0 (store |c_old(#memory_int)| |c_func_to_recursive_line_0_to_32_0_#in~x.base| v_DerPreprocessor_4))) (let ((.cse1 (select .cse0 |c_func_to_recursive_line_0_to_32_0_#in~r.base|)) (.cse2 (select (select |c_#memory_int| |c_func_to_recursive_line_0_to_32_0_#in~r.base|) |c_func_to_recursive_line_0_to_32_0_#in~r.offset|))) (and (= (store .cse0 |c_func_to_recursive_line_0_to_32_0_#in~r.base| (store .cse1 |c_func_to_recursive_line_0_to_32_0_#in~r.offset| .cse2)) |c_#memory_int|) (<= (+ (select .cse1 |c_func_to_recursive_line_0_to_32_0_#in~r.offset|) 1) .cse2))))) is different from true [2023-11-24 23:49:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:00,032 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 39 treesize of output 34 [2023-11-24 23:49:00,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 3 [2023-11-24 23:49:00,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-24 23:49:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-11-24 23:49:00,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:00,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765845764] [2023-11-24 23:49:00,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734171244] [2023-11-24 23:49:00,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734171244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:00,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1394122128] [2023-11-24 23:49:00,319 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-11-24 23:49:00,319 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:00,320 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:00,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:00,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-24 23:49:00,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429047557] [2023-11-24 23:49:00,321 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:00,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:49:00,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:49:00,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=85, Unknown=3, NotChecked=18, Total=132 [2023-11-24 23:49:00,323 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:49:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:00,445 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2023-11-24 23:49:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:49:00,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-11-24 23:49:00,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:00,447 INFO L225 Difference]: With dead ends: 59 [2023-11-24 23:49:00,447 INFO L226 Difference]: Without dead ends: 58 [2023-11-24 23:49:00,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=101, Unknown=3, NotChecked=20, Total=156 [2023-11-24 23:49:00,448 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:00,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 49 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2023-11-24 23:49:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-24 23:49:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2023-11-24 23:49:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.131578947368421) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 8 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2023-11-24 23:49:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2023-11-24 23:49:00,459 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 29 [2023-11-24 23:49:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:00,460 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2023-11-24 23:49:00,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:49:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2023-11-24 23:49:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:49:00,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:00,461 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2023-11-24 23:49:00,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:00,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:00,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:00,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:00,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1501732001, now seen corresponding path program 2 times [2023-11-24 23:49:00,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:00,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100013081] [2023-11-24 23:49:00,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:00,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:00,722 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:00,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97761237] [2023-11-24 23:49:00,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:49:00,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:00,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:00,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:00,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 23:49:01,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:49:01,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:01,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-24 23:49:01,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:01,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:01,922 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 14 treesize of output 12 [2023-11-24 23:49:02,031 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 [2023-11-24 23:49:02,062 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 19 treesize of output 11 [2023-11-24 23:49:02,178 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 [2023-11-24 23:49:02,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 23:49:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:02,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:02,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:02,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100013081] [2023-11-24 23:49:02,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97761237] [2023-11-24 23:49:02,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97761237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:02,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [474912506] [2023-11-24 23:49:02,656 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:49:02,656 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:02,656 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:02,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:02,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-24 23:49:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971030456] [2023-11-24 23:49:02,660 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:02,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 23:49:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 23:49:02,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=278, Unknown=7, NotChecked=0, Total=342 [2023-11-24 23:49:02,662 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:49:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:03,174 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-11-24 23:49:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 23:49:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-24 23:49:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:03,178 INFO L225 Difference]: With dead ends: 71 [2023-11-24 23:49:03,178 INFO L226 Difference]: Without dead ends: 70 [2023-11-24 23:49:03,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=449, Unknown=7, NotChecked=0, Total=552 [2023-11-24 23:49:03,182 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:03,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 133 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:49:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-24 23:49:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-11-24 23:49:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 8 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (15), 10 states have call predecessors, (15), 8 states have call successors, (15) [2023-11-24 23:49:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-11-24 23:49:03,202 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 30 [2023-11-24 23:49:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:03,203 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-11-24 23:49:03,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:49:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-11-24 23:49:03,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 23:49:03,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:03,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:03,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:03,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 23:49:03,417 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:03,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:03,417 INFO L85 PathProgramCache]: Analyzing trace with hash -350113143, now seen corresponding path program 1 times [2023-11-24 23:49:03,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:03,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135615178] [2023-11-24 23:49:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:03,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:03,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:03,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549666292] [2023-11-24 23:49:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:03,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:03,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:03,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:03,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 23:49:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:03,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-24 23:49:03,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:03,615 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:49:03,616 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 44 treesize of output 48 [2023-11-24 23:49:03,659 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:03,820 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_5 (Array Int Int))) (= (let ((.cse0 (store |c_old(#memory_int)| |c_func_to_recursive_line_0_to_32_0_#in~x.base| v_DerPreprocessor_5))) (store .cse0 |c_func_to_recursive_line_0_to_32_0_#in~r.base| (let ((.cse1 (select .cse0 |c_func_to_recursive_line_0_to_32_0_#in~r.base|))) (store .cse1 |c_func_to_recursive_line_0_to_32_0_#in~r.offset| (+ 1 (select .cse1 |c_func_to_recursive_line_0_to_32_0_#in~r.offset|)))))) |c_#memory_int|)) is different from true [2023-11-24 23:49:03,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:03,841 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 28 treesize of output 23 [2023-11-24 23:49:03,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-24 23:49:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-11-24 23:49:03,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:04,052 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_553 (Array Int Int))) (< (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base| v_ArrVal_553) |c_ULTIMATE.start_main_~#r~0#1.base|) |c_ULTIMATE.start_main_~#r~0#1.offset|))) (+ (* .cse0 2) (* .cse0 .cse0))) 2147483647)) is different from false [2023-11-24 23:49:04,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135615178] [2023-11-24 23:49:04,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549666292] [2023-11-24 23:49:04,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549666292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [515942474] [2023-11-24 23:49:04,057 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-24 23:49:04,057 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:04,058 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:04,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:04,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-24 23:49:04,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302837071] [2023-11-24 23:49:04,058 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:04,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 23:49:04,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 23:49:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=89, Unknown=2, NotChecked=38, Total=156 [2023-11-24 23:49:04,060 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 10 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:49:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:04,272 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2023-11-24 23:49:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:49:04,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-11-24 23:49:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:04,274 INFO L225 Difference]: With dead ends: 70 [2023-11-24 23:49:04,274 INFO L226 Difference]: Without dead ends: 62 [2023-11-24 23:49:04,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=105, Unknown=2, NotChecked=42, Total=182 [2023-11-24 23:49:04,275 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:04,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2023-11-24 23:49:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-24 23:49:04,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-24 23:49:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.119047619047619) internal successors, (47), 46 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-24 23:49:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-11-24 23:49:04,289 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 30 [2023-11-24 23:49:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:04,290 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-11-24 23:49:04,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.0) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:49:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-11-24 23:49:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 23:49:04,297 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:04,298 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2023-11-24 23:49:04,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:04,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 23:49:04,505 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting func_to_recursive_line_0_to_32_0Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:04,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:04,506 INFO L85 PathProgramCache]: Analyzing trace with hash 465203464, now seen corresponding path program 2 times [2023-11-24 23:49:04,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:04,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077863799] [2023-11-24 23:49:04,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:04,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:04,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:04,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684404882] [2023-11-24 23:49:04,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:49:04,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:04,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:04,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 23:49:04,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:49:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:04,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-24 23:49:04,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:04,811 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 14 treesize of output 12 [2023-11-24 23:49:08,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:49:08,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 12 [2023-11-24 23:49:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 23:49:10,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:10,674 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_632 (Array Int Int))) (< (select (select (store |c_#memory_int| c_func_to_recursive_line_0_to_32_0_~x.base v_ArrVal_632) c_func_to_recursive_line_0_to_32_0_~r.base) c_func_to_recursive_line_0_to_32_0_~r.offset) 2147483647)) is different from false [2023-11-24 23:49:10,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:10,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077863799] [2023-11-24 23:49:10,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684404882] [2023-11-24 23:49:10,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684404882] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536200332] [2023-11-24 23:49:10,688 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:49:10,688 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:10,688 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:10,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:10,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2023-11-24 23:49:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025332811] [2023-11-24 23:49:10,690 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:10,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:49:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:49:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=68, Unknown=3, NotChecked=16, Total=110 [2023-11-24 23:49:10,692 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:49:12,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:49:16,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:49:17,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:49:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:17,876 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-11-24 23:49:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:49:17,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-11-24 23:49:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:17,878 INFO L225 Difference]: With dead ends: 62 [2023-11-24 23:49:17,878 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 23:49:17,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=73, Invalid=200, Unknown=3, NotChecked=30, Total=306 [2023-11-24 23:49:17,879 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:17,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2023-11-24 23:49:17,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 23:49:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-24 23:49:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 45 states have internal predecessors, (46), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2023-11-24 23:49:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2023-11-24 23:49:17,893 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 37 [2023-11-24 23:49:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:17,894 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2023-11-24 23:49:17,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 23:49:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2023-11-24 23:49:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 23:49:17,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:17,895 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2023-11-24 23:49:17,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:18,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 23:49:18,102 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:18,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:18,102 INFO L85 PathProgramCache]: Analyzing trace with hash 240027438, now seen corresponding path program 3 times [2023-11-24 23:49:18,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:18,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410839973] [2023-11-24 23:49:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:18,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:18,125 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:18,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173361299] [2023-11-24 23:49:18,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:49:18,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:18,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 23:49:18,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:49:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:18,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-24 23:49:18,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:18,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:18,362 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 14 treesize of output 12 [2023-11-24 23:49:18,485 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 [2023-11-24 23:49:18,533 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 19 treesize of output 11 [2023-11-24 23:49:18,674 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 [2023-11-24 23:49:18,723 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 19 treesize of output 11 [2023-11-24 23:49:18,893 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 [2023-11-24 23:49:18,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 23:49:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:19,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:19,281 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_724 (Array Int Int)) (|v_func_to_recursive_line_0_to_32_0_#t~mem4_31| Int)) (let ((.cse0 (select (select (store |c_#memory_int| c_func_to_recursive_line_0_to_32_0_~x.base v_ArrVal_724) c_func_to_recursive_line_0_to_32_0_~r.base) c_func_to_recursive_line_0_to_32_0_~r.offset))) (or (< (+ |v_func_to_recursive_line_0_to_32_0_#t~mem4_31| (* .cse0 |v_func_to_recursive_line_0_to_32_0_#t~mem4_31|)) 2147483648) (< (+ .cse0 1) |v_func_to_recursive_line_0_to_32_0_#t~mem4_31|)))) is different from false [2023-11-24 23:49:19,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410839973] [2023-11-24 23:49:19,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173361299] [2023-11-24 23:49:19,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173361299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:19,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985645979] [2023-11-24 23:49:19,312 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:49:19,312 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:19,313 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:19,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:19,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-24 23:49:19,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401292135] [2023-11-24 23:49:19,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 23:49:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:19,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 23:49:19,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=395, Unknown=1, NotChecked=40, Total=506 [2023-11-24 23:49:19,323 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 23:49:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:19,972 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2023-11-24 23:49:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 23:49:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-11-24 23:49:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:19,975 INFO L225 Difference]: With dead ends: 85 [2023-11-24 23:49:19,975 INFO L226 Difference]: Without dead ends: 84 [2023-11-24 23:49:19,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=646, Unknown=1, NotChecked=52, Total=812 [2023-11-24 23:49:19,976 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:19,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 137 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:49:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-24 23:49:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2023-11-24 23:49:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 58 states have internal predecessors, (59), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-24 23:49:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-11-24 23:49:19,990 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 42 [2023-11-24 23:49:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:19,991 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-11-24 23:49:19,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 23:49:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-11-24 23:49:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-24 23:49:19,993 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:19,993 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:20,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:20,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 23:49:20,200 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:20,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash 189390179, now seen corresponding path program 2 times [2023-11-24 23:49:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:20,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044733759] [2023-11-24 23:49:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:20,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:20,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:20,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621005228] [2023-11-24 23:49:20,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:49:20,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:20,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:20,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:20,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 23:49:20,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-24 23:49:20,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:20,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:49:20,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:20,415 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 [2023-11-24 23:49:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-24 23:49:20,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:49:20,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044733759] [2023-11-24 23:49:20,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:20,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621005228] [2023-11-24 23:49:20,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621005228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:49:20,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:49:20,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:49:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700152704] [2023-11-24 23:49:20,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:49:20,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:49:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:49:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:49:20,425 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:49:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:20,450 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2023-11-24 23:49:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:49:20,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-11-24 23:49:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:20,452 INFO L225 Difference]: With dead ends: 79 [2023-11-24 23:49:20,453 INFO L226 Difference]: Without dead ends: 78 [2023-11-24 23:49:20,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:49:20,454 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:20,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:49:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-24 23:49:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-24 23:49:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 57 states have internal predecessors, (58), 10 states have call successors, (10), 9 states have call predecessors, (10), 12 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2023-11-24 23:49:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-24 23:49:20,471 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 43 [2023-11-24 23:49:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:20,472 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-24 23:49:20,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 23:49:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-24 23:49:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-24 23:49:20,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:20,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:49:20,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:20,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:20,681 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:20,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1576128314, now seen corresponding path program 2 times [2023-11-24 23:49:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:20,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240605832] [2023-11-24 23:49:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:20,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:20,701 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:20,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13871337] [2023-11-24 23:49:20,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:49:20,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:20,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:20,704 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:20,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 23:49:20,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:49:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:20,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-24 23:49:20,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:21,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:49:21,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-11-24 23:49:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 23:49:21,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:21,807 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 40 treesize of output 32 [2023-11-24 23:49:22,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:22,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240605832] [2023-11-24 23:49:22,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13871337] [2023-11-24 23:49:22,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13871337] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [357038898] [2023-11-24 23:49:22,126 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-24 23:49:22,126 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:22,126 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:22,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:22,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-11-24 23:49:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154321515] [2023-11-24 23:49:22,128 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:22,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-24 23:49:22,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-24 23:49:22,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-11-24 23:49:22,131 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-24 23:49:24,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:49:26,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:49:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:26,354 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-11-24 23:49:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:49:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2023-11-24 23:49:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:26,355 INFO L225 Difference]: With dead ends: 78 [2023-11-24 23:49:26,356 INFO L226 Difference]: Without dead ends: 58 [2023-11-24 23:49:26,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:49:26,357 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:26,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2023-11-24 23:49:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-24 23:49:26,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-11-24 23:49:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 9 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:49:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2023-11-24 23:49:26,368 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 44 [2023-11-24 23:49:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:26,368 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2023-11-24 23:49:26,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-24 23:49:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2023-11-24 23:49:26,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-24 23:49:26,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:26,370 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2023-11-24 23:49:26,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:26,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 23:49:26,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:26,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:26,574 INFO L85 PathProgramCache]: Analyzing trace with hash 175467645, now seen corresponding path program 4 times [2023-11-24 23:49:26,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:26,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661052074] [2023-11-24 23:49:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:26,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:26,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191356133] [2023-11-24 23:49:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 23:49:26,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:26,597 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:26,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 23:49:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:26,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-24 23:49:26,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:26,888 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 14 treesize of output 12 [2023-11-24 23:49:26,894 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:26,988 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 [2023-11-24 23:49:27,034 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 19 treesize of output 11 [2023-11-24 23:49:27,160 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 [2023-11-24 23:49:27,193 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 19 treesize of output 11 [2023-11-24 23:49:27,350 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 [2023-11-24 23:49:27,395 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 19 treesize of output 11 [2023-11-24 23:49:27,553 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 [2023-11-24 23:49:27,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 23:49:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:27,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:27,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:27,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661052074] [2023-11-24 23:49:27,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191356133] [2023-11-24 23:49:27,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191356133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79770906] [2023-11-24 23:49:27,919 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:49:27,919 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:27,919 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:27,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:27,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-11-24 23:49:27,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549595969] [2023-11-24 23:49:27,921 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:27,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 23:49:27,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 23:49:27,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=605, Unknown=4, NotChecked=0, Total=702 [2023-11-24 23:49:27,923 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 16 states have internal predecessors, (41), 6 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:49:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:28,680 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2023-11-24 23:49:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-24 23:49:28,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 16 states have internal predecessors, (41), 6 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2023-11-24 23:49:28,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:28,682 INFO L225 Difference]: With dead ends: 71 [2023-11-24 23:49:28,682 INFO L226 Difference]: Without dead ends: 70 [2023-11-24 23:49:28,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=970, Unknown=4, NotChecked=0, Total=1122 [2023-11-24 23:49:28,683 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:28,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 77 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:49:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-24 23:49:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2023-11-24 23:49:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 11 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 23:49:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2023-11-24 23:49:28,696 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 54 [2023-11-24 23:49:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:28,696 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2023-11-24 23:49:28,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 16 states have internal predecessors, (41), 6 states have call successors, (9), 9 states have call predecessors, (9), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-24 23:49:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2023-11-24 23:49:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-24 23:49:28,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:28,697 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1] [2023-11-24 23:49:28,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:28,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 23:49:28,909 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:28,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash -858008756, now seen corresponding path program 5 times [2023-11-24 23:49:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033368684] [2023-11-24 23:49:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:28,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:28,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:28,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863935396] [2023-11-24 23:49:28,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:49:28,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:28,934 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:28,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 23:49:30,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-24 23:49:30,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:30,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-24 23:49:30,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:30,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:30,883 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 23:49:30,884 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 90 treesize of output 87 [2023-11-24 23:49:31,001 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 [2023-11-24 23:49:31,052 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 19 treesize of output 11 [2023-11-24 23:49:31,166 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 [2023-11-24 23:49:31,202 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 19 treesize of output 11 [2023-11-24 23:49:31,361 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 [2023-11-24 23:49:31,416 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 19 treesize of output 11 [2023-11-24 23:49:31,572 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 [2023-11-24 23:49:31,618 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 19 treesize of output 11 [2023-11-24 23:49:31,812 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 [2023-11-24 23:49:31,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 23:49:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:31,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:32,232 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1104 (Array Int Int)) (|v_func_to_recursive_line_0_to_32_0_#t~mem5_60| Int)) (let ((.cse0 (select (select (store |c_#memory_int| c_func_to_recursive_line_0_to_32_0_~x.base v_ArrVal_1104) c_func_to_recursive_line_0_to_32_0_~r.base) c_func_to_recursive_line_0_to_32_0_~r.offset))) (or (< (+ (* |v_func_to_recursive_line_0_to_32_0_#t~mem5_60| .cse0) |v_func_to_recursive_line_0_to_32_0_#t~mem5_60|) 2147483648) (< (+ .cse0 1) |v_func_to_recursive_line_0_to_32_0_#t~mem5_60|)))) is different from false [2023-11-24 23:49:32,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033368684] [2023-11-24 23:49:32,256 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863935396] [2023-11-24 23:49:32,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863935396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:32,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070600504] [2023-11-24 23:49:32,258 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:49:32,258 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:32,258 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:32,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:32,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-11-24 23:49:32,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477892270] [2023-11-24 23:49:32,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:32,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 23:49:32,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:32,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 23:49:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=828, Unknown=1, NotChecked=58, Total=992 [2023-11-24 23:49:32,263 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 19 states have internal predecessors, (50), 7 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 23:49:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:33,433 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2023-11-24 23:49:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-24 23:49:33,433 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 19 states have internal predecessors, (50), 7 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 66 [2023-11-24 23:49:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:33,435 INFO L225 Difference]: With dead ends: 83 [2023-11-24 23:49:33,435 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 23:49:33,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=1323, Unknown=1, NotChecked=74, Total=1560 [2023-11-24 23:49:33,437 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:33,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 135 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:49:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 23:49:33,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2023-11-24 23:49:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 13 states have call successors, (13), 13 states have call predecessors, (13), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:49:33,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2023-11-24 23:49:33,452 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 66 [2023-11-24 23:49:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:33,452 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2023-11-24 23:49:33,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 19 states have internal predecessors, (50), 7 states have call successors, (11), 11 states have call predecessors, (11), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-24 23:49:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2023-11-24 23:49:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-24 23:49:33,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:33,454 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1] [2023-11-24 23:49:33,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:33,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 23:49:33,663 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:33,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash 919305115, now seen corresponding path program 6 times [2023-11-24 23:49:33,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:33,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401791734] [2023-11-24 23:49:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:33,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:33,703 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:33,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892615177] [2023-11-24 23:49:33,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:49:33,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:33,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:33,705 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 23:49:34,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:49:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:34,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 140 conjunts are in the unsatisfiable core [2023-11-24 23:49:34,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:34,199 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 14 treesize of output 12 [2023-11-24 23:49:34,204 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 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:34,299 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 [2023-11-24 23:49:34,334 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 19 treesize of output 11 [2023-11-24 23:49:34,450 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 [2023-11-24 23:49:34,490 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 19 treesize of output 11 [2023-11-24 23:49:34,641 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 [2023-11-24 23:49:34,685 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 19 treesize of output 11 [2023-11-24 23:49:34,856 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 [2023-11-24 23:49:34,904 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 19 treesize of output 11 [2023-11-24 23:49:35,096 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 [2023-11-24 23:49:35,154 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 19 treesize of output 11 [2023-11-24 23:49:35,363 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 [2023-11-24 23:49:35,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 23:49:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:35,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:35,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401791734] [2023-11-24 23:49:35,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892615177] [2023-11-24 23:49:35,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892615177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999514921] [2023-11-24 23:49:35,869 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:49:35,870 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:35,870 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:35,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:35,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-11-24 23:49:35,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547279441] [2023-11-24 23:49:35,870 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:35,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 23:49:35,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:35,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 23:49:35,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1056, Unknown=5, NotChecked=0, Total=1190 [2023-11-24 23:49:35,873 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 22 states have internal predecessors, (59), 8 states have call successors, (13), 13 states have call predecessors, (13), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:49:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:37,263 INFO L93 Difference]: Finished difference Result 95 states and 96 transitions. [2023-11-24 23:49:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-24 23:49:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 22 states have internal predecessors, (59), 8 states have call successors, (13), 13 states have call predecessors, (13), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 78 [2023-11-24 23:49:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:37,267 INFO L225 Difference]: With dead ends: 95 [2023-11-24 23:49:37,267 INFO L226 Difference]: Without dead ends: 94 [2023-11-24 23:49:37,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=200, Invalid=1687, Unknown=5, NotChecked=0, Total=1892 [2023-11-24 23:49:37,269 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:37,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 147 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-24 23:49:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-24 23:49:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2023-11-24 23:49:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 15 states have call successors, (15), 15 states have call predecessors, (15), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 23:49:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2023-11-24 23:49:37,286 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 78 [2023-11-24 23:49:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:37,286 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2023-11-24 23:49:37,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 22 states have internal predecessors, (59), 8 states have call successors, (13), 13 states have call predecessors, (13), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 23:49:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2023-11-24 23:49:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-24 23:49:37,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:37,288 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1] [2023-11-24 23:49:37,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:37,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 23:49:37,497 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:37,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:37,497 INFO L85 PathProgramCache]: Analyzing trace with hash -923916950, now seen corresponding path program 7 times [2023-11-24 23:49:37,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:37,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424052858] [2023-11-24 23:49:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:37,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:37,530 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:37,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099191530] [2023-11-24 23:49:37,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 23:49:37,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:37,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:37,532 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:37,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-24 23:49:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:49:37,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 156 conjunts are in the unsatisfiable core [2023-11-24 23:49:37,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:37,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:37,850 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 14 treesize of output 12 [2023-11-24 23:49:37,948 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 [2023-11-24 23:49:37,973 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 19 treesize of output 11 [2023-11-24 23:49:38,078 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 [2023-11-24 23:49:38,112 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 19 treesize of output 11 [2023-11-24 23:49:38,240 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 [2023-11-24 23:49:38,279 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 19 treesize of output 11 [2023-11-24 23:49:38,454 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 [2023-11-24 23:49:38,501 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 19 treesize of output 11 [2023-11-24 23:49:38,675 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 [2023-11-24 23:49:38,719 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 19 treesize of output 11 [2023-11-24 23:49:38,890 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 [2023-11-24 23:49:38,940 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 19 treesize of output 11 [2023-11-24 23:49:39,126 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 [2023-11-24 23:49:39,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-24 23:49:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:49:39,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:49:39,612 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1417 (Array Int Int)) (|v_func_to_recursive_line_0_to_32_0_#t~mem5_64| Int)) (let ((.cse0 (select (select (store |c_#memory_int| c_func_to_recursive_line_0_to_32_0_~x.base v_ArrVal_1417) c_func_to_recursive_line_0_to_32_0_~r.base) c_func_to_recursive_line_0_to_32_0_~r.offset))) (or (< (+ .cse0 1) |v_func_to_recursive_line_0_to_32_0_#t~mem5_64|) (< (+ |v_func_to_recursive_line_0_to_32_0_#t~mem5_64| (* |v_func_to_recursive_line_0_to_32_0_#t~mem5_64| .cse0)) 2147483648)))) is different from false [2023-11-24 23:49:39,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:49:39,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424052858] [2023-11-24 23:49:39,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:49:39,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099191530] [2023-11-24 23:49:39,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099191530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:49:39,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1384101843] [2023-11-24 23:49:39,642 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-24 23:49:39,642 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:49:39,642 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-24 23:49:39,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:49:39,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-11-24 23:49:39,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317720254] [2023-11-24 23:49:39,644 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-24 23:49:39,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-24 23:49:39,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:49:39,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-24 23:49:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1275, Unknown=1, NotChecked=72, Total=1482 [2023-11-24 23:49:39,646 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 34 states, 32 states have (on average 2.125) internal successors, (68), 25 states have internal predecessors, (68), 9 states have call successors, (15), 15 states have call predecessors, (15), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 23:49:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:49:41,301 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2023-11-24 23:49:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-24 23:49:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 25 states have internal predecessors, (68), 9 states have call successors, (15), 15 states have call predecessors, (15), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 90 [2023-11-24 23:49:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:49:41,306 INFO L225 Difference]: With dead ends: 107 [2023-11-24 23:49:41,306 INFO L226 Difference]: Without dead ends: 106 [2023-11-24 23:49:41,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=205, Invalid=2054, Unknown=1, NotChecked=92, Total=2352 [2023-11-24 23:49:41,308 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:49:41,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 156 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 23:49:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-24 23:49:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2023-11-24 23:49:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 17 states have call successors, (17), 17 states have call predecessors, (17), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-24 23:49:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2023-11-24 23:49:41,327 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 90 [2023-11-24 23:49:41,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:49:41,328 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2023-11-24 23:49:41,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.125) internal successors, (68), 25 states have internal predecessors, (68), 9 states have call successors, (15), 15 states have call predecessors, (15), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 23:49:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2023-11-24 23:49:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:49:41,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:49:41,330 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2023-11-24 23:49:41,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-24 23:49:41,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-24 23:49:41,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_0_to_32_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_0_to_32_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 4 more)] === [2023-11-24 23:49:41,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:49:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1823633223, now seen corresponding path program 8 times [2023-11-24 23:49:41,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:49:41,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833188275] [2023-11-24 23:49:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:49:41,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:49:41,572 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:49:41,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968454281] [2023-11-24 23:49:41,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:49:41,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:49:41,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:49:41,574 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:49:41,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e29a57c8-d7aa-4d08-b93b-9e01e584a6a4/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-24 23:49:49,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-24 23:49:49,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:49:49,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 211 conjunts are in the unsatisfiable core [2023-11-24 23:49:49,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:49:49,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 23:49:49,265 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 14 treesize of output 12 [2023-11-24 23:49:49,410 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 [2023-11-24 23:49:49,452 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 19 treesize of output 11 [2023-11-24 23:49:49,601 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 [2023-11-24 23:49:49,644 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 19 treesize of output 11 [2023-11-24 23:49:49,810 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 [2023-11-24 23:49:49,860 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 19 treesize of output 11 [2023-11-24 23:49:50,071 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 [2023-11-24 23:49:50,145 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 19 treesize of output 11 [2023-11-24 23:49:50,344 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 [2023-11-24 23:49:50,404 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 19 treesize of output 11