./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv.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_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/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_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/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_1d62ed8f-7d63-4339-8c01-7aedcf42db99/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 c56685f9b6d3ffae51cc6068fd351a6683202b948d7f1ef6f1e8af6f2a55035a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:18:55,659 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:18:55,781 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-24 23:18:55,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:18:55,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:18:55,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:18:55,851 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:18:55,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:18:55,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:18:55,858 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:18:55,858 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:18:55,859 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:18:55,860 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:18:55,861 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:18:55,862 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:18:55,862 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:18:55,863 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:18:55,863 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:18:55,863 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:18:55,864 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:18:55,864 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:18:55,865 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:18:55,866 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:18:55,866 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:18:55,866 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:18:55,867 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:18:55,867 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:18:55,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:18:55,868 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:18:55,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:18:55,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:18:55,870 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-24 23:18:55,870 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 23:18:55,870 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:18:55,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:18:55,871 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:18:55,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:18:55,877 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:18:55,877 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:18:55,877 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:18:55,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:18:55,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:18:55,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:18:55,878 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:18:55,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:18:55,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:18:55,879 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:18:55,879 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:18:55,879 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:18:55,880 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_1d62ed8f-7d63-4339-8c01-7aedcf42db99/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c56685f9b6d3ffae51cc6068fd351a6683202b948d7f1ef6f1e8af6f2a55035a [2023-11-24 23:18:56,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:18:56,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:18:56,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:18:56,241 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:18:56,242 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:18:56,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv.c [2023-11-24 23:18:59,436 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:18:59,725 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:18:59,726 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv.c [2023-11-24 23:18:59,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/data/9b5da0ff7/b0a1a4579e7e43849f02ea3b88771310/FLAGf9e8d4c2b [2023-11-24 23:18:59,756 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/data/9b5da0ff7/b0a1a4579e7e43849f02ea3b88771310 [2023-11-24 23:18:59,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:18:59,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:18:59,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:18:59,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:18:59,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:18:59,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:18:59" (1/1) ... [2023-11-24 23:18:59,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5848ecaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:18:59, skipping insertion in model container [2023-11-24 23:18:59,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:18:59" (1/1) ... [2023-11-24 23:18:59,821 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:19:00,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:00,121 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:19:00,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:00,204 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:19:00,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00 WrapperNode [2023-11-24 23:19:00,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:00,207 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:00,207 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:19:00,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:19:00,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,285 INFO L138 Inliner]: procedures = 17, calls = 85, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-24 23:19:00,285 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:00,286 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:19:00,286 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:19:00,287 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:19:00,299 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,344 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:19:00,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:19:00,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:19:00,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:19:00,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (1/1) ... [2023-11-24 23:19:00,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:00,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:00,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:19:00,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:19:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:19:00,452 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_51_0 [2023-11-24 23:19:00,452 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_51_0 [2023-11-24 23:19:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:19:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:19:00,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:19:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_54_0 [2023-11-24 23:19:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_54_0 [2023-11-24 23:19:00,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:19:00,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:19:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:19:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:19:00,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:19:00,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:19:00,568 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:19:00,571 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:19:01,056 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:19:01,160 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:19:01,164 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:19:01,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:01 BoogieIcfgContainer [2023-11-24 23:19:01,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:19:01,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:19:01,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:19:01,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:19:01,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:18:59" (1/3) ... [2023-11-24 23:19:01,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b614fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:01, skipping insertion in model container [2023-11-24 23:19:01,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:00" (2/3) ... [2023-11-24 23:19:01,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57b614fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:19:01, skipping insertion in model container [2023-11-24 23:19:01,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:19:01" (3/3) ... [2023-11-24 23:19:01,177 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv.c [2023-11-24 23:19:01,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:19:01,200 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-24 23:19:01,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:19:01,267 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;@31c9a563, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:19:01,267 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-24 23:19:01,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 81 states have internal predecessors, (83), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-24 23:19:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:19:01,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:01,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:19:01,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_31_to_54_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_51_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_51_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-24 23:19:01,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash 181748035, now seen corresponding path program 1 times [2023-11-24 23:19:01,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:01,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833017629] [2023-11-24 23:19:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:01,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:01,475 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:19:01,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010596221] [2023-11-24 23:19:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:01,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:01,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:01,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:01,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:19:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:01,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-24 23:19:01,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:01,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,191 INFO L349 Elim1Store]: treesize reduction 34, result has 42.4 percent of original size [2023-11-24 23:19:02,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 144 [2023-11-24 23:19:02,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:02,344 INFO L349 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-11-24 23:19:02,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 77 [2023-11-24 23:19:02,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-24 23:19:02,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2023-11-24 23:19:02,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2023-11-24 23:19:02,821 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:02,833 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-24 23:19:02,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 45 [2023-11-24 23:19:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,459 INFO L349 Elim1Store]: treesize reduction 45, result has 33.8 percent of original size [2023-11-24 23:19:03,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 126 [2023-11-24 23:19:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,512 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 23:19:03,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-24 23:19:03,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-24 23:19:03,564 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 23:19:03,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2023-11-24 23:19:03,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 23:19:03,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 35 [2023-11-24 23:19:03,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,805 INFO L349 Elim1Store]: treesize reduction 65, result has 30.1 percent of original size [2023-11-24 23:19:03,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 185 treesize of output 244 [2023-11-24 23:19:03,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:03,907 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 23:19:03,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-11-24 23:19:03,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 296 [2023-11-24 23:19:04,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 60 [2023-11-24 23:19:04,048 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 23:19:04,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 29 [2023-11-24 23:19:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,216 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,246 INFO L349 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2023-11-24 23:19:04,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 559 treesize of output 453 [2023-11-24 23:19:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,523 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-11-24 23:19:04,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 117 [2023-11-24 23:19:04,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,571 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 23:19:04,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-11-24 23:19:04,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2023-11-24 23:19:04,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2023-11-24 23:19:04,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-24 23:19:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:04,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 26 [2023-11-24 23:19:04,790 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,792 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,796 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:19:04,802 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,803 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,804 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,807 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:19:04,813 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,815 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:04,822 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:19:05,034 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-24 23:19:05,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 21 [2023-11-24 23:19:05,052 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 23:19:05,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:19:05,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:19:05,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833017629] [2023-11-24 23:19:05,053 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:19:05,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010596221] [2023-11-24 23:19:05,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010596221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:19:05,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:19:05,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:19:05,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229756647] [2023-11-24 23:19:05,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:19:05,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:19:05,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:19:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:19:05,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:19:05,107 INFO L87 Difference]: Start difference. First operand has 94 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 81 states have internal predecessors, (83), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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 23:19:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:19:05,567 INFO L93 Difference]: Finished difference Result 217 states and 248 transitions. [2023-11-24 23:19:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:19:05,570 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 23:19:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:19:05,581 INFO L225 Difference]: With dead ends: 217 [2023-11-24 23:19:05,581 INFO L226 Difference]: Without dead ends: 120 [2023-11-24 23:19:05,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:19:05,590 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 45 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:19:05,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 389 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:19:05,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-24 23:19:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2023-11-24 23:19:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 91 states have internal predecessors, (97), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-11-24 23:19:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2023-11-24 23:19:05,657 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 5 [2023-11-24 23:19:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:19:05,658 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2023-11-24 23:19:05,658 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 23:19:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2023-11-24 23:19:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:19:05,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:19:05,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:19:05,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:19:05,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:05,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_31_to_54_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [func_to_recursive_line_40_to_51_0Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, func_to_recursive_line_40_to_51_0Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-24 23:19:05,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:19:05,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1339221879, now seen corresponding path program 1 times [2023-11-24 23:19:05,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:19:05,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279819279] [2023-11-24 23:19:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:19:05,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:19:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767622332] [2023-11-24 23:19:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:19:05,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:19:05,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:19:05,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:19:05,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d62ed8f-7d63-4339-8c01-7aedcf42db99/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:19:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:19:06,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-24 23:19:06,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:19:06,108 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:06,109 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:06,115 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:19:06,121 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:06,122 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 23:19:06,127 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-24 23:19:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,291 INFO L349 Elim1Store]: treesize reduction 48, result has 48.9 percent of original size [2023-11-24 23:19:06,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 358 treesize of output 234 [2023-11-24 23:19:06,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,496 INFO L349 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2023-11-24 23:19:06,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 260 treesize of output 348 [2023-11-24 23:19:06,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 23:19:06,626 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 23:19:06,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2023-11-24 23:19:06,669 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 29 treesize of output 21 [2023-11-24 23:19:06,734 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 82 treesize of output 72 [2023-11-24 23:19:07,209 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 22 treesize of output 16 [2023-11-24 23:19:07,281 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 17 treesize of output 13 [2023-11-24 23:19:07,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:19:07,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 542 treesize of output 554 [2023-11-24 23:19:08,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 23:19:08,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 530 treesize of output 596