./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/tree-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/tree-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff6ec4010c0396675f743c4c0d5de68176a7292a1f0bcf6c389633f85d936d1a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:09,979 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:10,119 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:12:10,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:10,129 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:10,180 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:10,181 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:10,181 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:10,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:10,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:10,189 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:10,190 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:10,190 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:10,192 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:10,193 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:10,193 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:10,194 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:10,194 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:10,195 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:10,196 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:10,196 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:10,197 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:10,198 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:10,199 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:12:10,199 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:12:10,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:10,200 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:12:10,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:10,201 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:12:10,202 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:10,203 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:12:10,204 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:12:10,204 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:12:10,204 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:10,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:10,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:10,205 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:10,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:10,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:10,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:10,206 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:12:10,207 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:10,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:10,207 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:10,208 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:12:10,208 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:10,209 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:10,209 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_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff6ec4010c0396675f743c4c0d5de68176a7292a1f0bcf6c389633f85d936d1a [2023-11-23 21:12:10,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:10,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:10,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:10,644 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:10,644 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:10,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/heap-manipulation/tree-2.i [2023-11-23 21:12:13,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:14,113 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:14,114 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/sv-benchmarks/c/heap-manipulation/tree-2.i [2023-11-23 21:12:14,128 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/data/8e8634133/b42e5254fbf94bfcab48fb0591995a69/FLAGcf9d30540 [2023-11-23 21:12:14,140 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/data/8e8634133/b42e5254fbf94bfcab48fb0591995a69 [2023-11-23 21:12:14,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:14,144 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:14,146 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:14,146 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:14,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:14,153 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,154 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f102758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14, skipping insertion in model container [2023-11-23 21:12:14,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,205 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:14,572 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/sv-benchmarks/c/heap-manipulation/tree-2.i[22626,22639] [2023-11-23 21:12:14,627 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:14,641 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:14,696 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/sv-benchmarks/c/heap-manipulation/tree-2.i[22626,22639] [2023-11-23 21:12:14,721 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:14,755 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:14,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14 WrapperNode [2023-11-23 21:12:14,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:14,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:14,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:14,758 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:14,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,836 INFO L138 Inliner]: procedures = 122, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 146 [2023-11-23 21:12:14,841 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:14,842 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:14,842 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:14,842 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:14,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,856 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,856 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,865 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,869 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:14,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:14,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:14,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:14,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (1/1) ... [2023-11-23 21:12:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:14,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:14,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:14,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:15,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:12:15,023 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-23 21:12:15,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-23 21:12:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:12:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:12:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:15,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:12:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:12:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:12:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:15,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:15,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:15,161 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:15,163 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:15,516 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:15,660 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:15,661 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 21:12:15,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:15 BoogieIcfgContainer [2023-11-23 21:12:15,662 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:15,665 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:15,665 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:15,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:15,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:14" (1/3) ... [2023-11-23 21:12:15,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e34c514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:15, skipping insertion in model container [2023-11-23 21:12:15,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:14" (2/3) ... [2023-11-23 21:12:15,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e34c514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:15, skipping insertion in model container [2023-11-23 21:12:15,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:15" (3/3) ... [2023-11-23 21:12:15,680 INFO L112 eAbstractionObserver]: Analyzing ICFG tree-2.i [2023-11-23 21:12:15,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:15,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:12:15,753 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:15,762 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;@1ca04c40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:15,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:12:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:12:15,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:12:15,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:15,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:15,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:15,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:15,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1274429877, now seen corresponding path program 1 times [2023-11-23 21:12:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:15,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882661388] [2023-11-23 21:12:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:15,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:15,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:15,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882661388] [2023-11-23 21:12:15,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882661388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:15,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:15,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:12:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135466703] [2023-11-23 21:12:15,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:15,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 21:12:15,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:16,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 21:12:16,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:12:16,025 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 25 states have internal predecessors, (40), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:16,088 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2023-11-23 21:12:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 21:12:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2023-11-23 21:12:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:16,098 INFO L225 Difference]: With dead ends: 50 [2023-11-23 21:12:16,098 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 21:12:16,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 21:12:16,106 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:16,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:12:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 21:12:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 21:12:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-23 21:12:16,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 7 [2023-11-23 21:12:16,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:16,143 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-23 21:12:16,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,144 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-23 21:12:16,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:12:16,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:16,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:16,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:16,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:16,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1477503075, now seen corresponding path program 1 times [2023-11-23 21:12:16,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:16,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293559558] [2023-11-23 21:12:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:16,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:16,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:16,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293559558] [2023-11-23 21:12:16,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293559558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:16,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:16,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:16,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099624544] [2023-11-23 21:12:16,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:16,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:16,371 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:16,517 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-11-23 21:12:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 21:12:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:16,519 INFO L225 Difference]: With dead ends: 41 [2023-11-23 21:12:16,519 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 21:12:16,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:16,522 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:16,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:16,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 21:12:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-23 21:12:16,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-23 21:12:16,536 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 8 [2023-11-23 21:12:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:16,536 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-23 21:12:16,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-23 21:12:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:12:16,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:16,538 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:16,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:12:16,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:16,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:16,558 INFO L85 PathProgramCache]: Analyzing trace with hash 974936853, now seen corresponding path program 1 times [2023-11-23 21:12:16,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:16,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321333219] [2023-11-23 21:12:16,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:16,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:16,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:16,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321333219] [2023-11-23 21:12:16,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321333219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:16,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:16,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:16,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694919700] [2023-11-23 21:12:16,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:16,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:16,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:16,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:16,686 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:16,763 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2023-11-23 21:12:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:16,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2023-11-23 21:12:16,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:16,765 INFO L225 Difference]: With dead ends: 41 [2023-11-23 21:12:16,765 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 21:12:16,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:16,767 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:16,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:12:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 21:12:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-23 21:12:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-23 21:12:16,775 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2023-11-23 21:12:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:16,775 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-23 21:12:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-23 21:12:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:12:16,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:16,777 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:16,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:12:16,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:16,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:16,778 INFO L85 PathProgramCache]: Analyzing trace with hash 430427284, now seen corresponding path program 1 times [2023-11-23 21:12:16,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:16,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101033509] [2023-11-23 21:12:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:16,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:12:17,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101033509] [2023-11-23 21:12:17,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101033509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:17,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:12:17,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208048091] [2023-11-23 21:12:17,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:17,136 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:17,316 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-11-23 21:12:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:17,318 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2023-11-23 21:12:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:17,319 INFO L225 Difference]: With dead ends: 37 [2023-11-23 21:12:17,320 INFO L226 Difference]: Without dead ends: 34 [2023-11-23 21:12:17,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:12:17,322 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:17,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:12:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-23 21:12:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2023-11-23 21:12:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:17,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-23 21:12:17,338 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2023-11-23 21:12:17,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:17,340 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-23 21:12:17,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:12:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-23 21:12:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:12:17,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:17,343 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:17,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:12:17,344 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:17,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1646907504, now seen corresponding path program 1 times [2023-11-23 21:12:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:17,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266001375] [2023-11-23 21:12:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:17,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:19,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266001375] [2023-11-23 21:12:19,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266001375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:19,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501704070] [2023-11-23 21:12:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:19,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:19,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:19,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:19,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e7bf527-f320-4804-b12e-df9c34eb2ddd/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:12:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:19,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-23 21:12:19,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:19,880 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 6 treesize of output 5 [2023-11-23 21:12:20,048 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:20,072 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:20,100 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:20,130 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:20,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1544 treesize of output 1431 [2023-11-23 21:12:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:20,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:20,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 567 treesize of output 385 [2023-11-23 21:12:20,209 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-11-23 21:12:20,210 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 3729 treesize of output 3198 [2023-11-23 21:12:20,305 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 856 treesize of output 736 [2023-11-23 21:12:20,704 INFO L349 Elim1Store]: treesize reduction 112, result has 20.0 percent of original size [2023-11-23 21:12:20,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 965 treesize of output 933 [2023-11-23 21:12:20,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:20,959 INFO L349 Elim1Store]: treesize reduction 102, result has 34.2 percent of original size [2023-11-23 21:12:20,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 668 treesize of output 718 [2023-11-23 21:12:21,021 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 622 treesize of output 538 [2023-11-23 21:12:21,154 INFO L349 Elim1Store]: treesize reduction 52, result has 38.8 percent of original size [2023-11-23 21:12:21,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 229 treesize of output 317 [2023-11-23 21:12:21,224 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 285 treesize of output 237 [2023-11-23 21:12:21,315 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 69 treesize of output 57 [2023-11-23 21:12:21,421 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-23 21:12:21,421 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 15 treesize of output 15 [2023-11-23 21:12:21,638 INFO L349 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-23 21:12:21,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 77 [2023-11-23 21:12:21,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:12:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:21,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:21,704 INFO L349 Elim1Store]: treesize reduction 41, result has 22.6 percent of original size [2023-11-23 21:12:21,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 53 [2023-11-23 21:12:21,728 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-11-23 21:12:21,772 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-23 21:12:21,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2023-11-23 21:12:21,811 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-23 21:12:21,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 86 [2023-11-23 21:12:22,225 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:22,240 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:22,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1544 treesize of output 1431 [2023-11-23 21:12:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:22,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 585 treesize of output 395 [2023-11-23 21:12:22,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:22,406 INFO L349 Elim1Store]: treesize reduction 536, result has 0.2 percent of original size [2023-11-23 21:12:22,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 5398 treesize of output 5141 [2023-11-23 21:12:22,513 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-23 21:12:22,513 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 15 treesize of output 15 [2023-11-23 21:12:22,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:22,613 INFO L349 Elim1Store]: treesize reduction 326, result has 0.3 percent of original size [2023-11-23 21:12:22,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 5715 treesize of output 5341 [2023-11-23 21:12:22,688 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-23 21:12:22,689 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 15 treesize of output 15 [2023-11-23 21:12:22,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:22,757 INFO L349 Elim1Store]: treesize reduction 77, result has 1.3 percent of original size [2023-11-23 21:12:22,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 203 treesize of output 200 [2023-11-23 21:12:22,775 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 259 treesize of output 225 [2023-11-23 21:12:22,787 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 271 treesize of output 217 [2023-11-23 21:12:22,811 INFO L349 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-11-23 21:12:22,811 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 2 case distinctions, treesize of input 29 treesize of output 5 [2023-11-23 21:12:22,824 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 149 treesize of output 123 [2023-11-23 21:12:22,862 INFO L349 Elim1Store]: treesize reduction 138, result has 0.7 percent of original size [2023-11-23 21:12:22,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 37 [2023-11-23 21:12:22,870 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 15 treesize of output 13 [2023-11-23 21:12:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:12:22,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 1 [2023-11-23 21:12:22,907 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 21:12:22,913 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:22,914 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:22,918 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:22,989 INFO L349 Elim1Store]: treesize reduction 311, result has 0.3 percent of original size [2023-11-23 21:12:22,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 5369 treesize of output 5070 [2023-11-23 21:12:23,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,118 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,120 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,125 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,137 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:23,249 INFO L349 Elim1Store]: treesize reduction 668, result has 0.1 percent of original size [2023-11-23 21:12:23,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 8264 treesize of output 7816 [2023-11-23 21:12:23,474 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,475 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,479 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,481 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:12:23,497 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:23,509 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-23 21:12:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:23,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:12:24,231 INFO L349 Elim1Store]: treesize reduction 15, result has 70.0 percent of original size [2023-11-23 21:12:24,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 1230 treesize of output 766 [2023-11-23 21:12:31,871 WARN L293 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 38 DAG size of output: 28 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-23 21:12:31,872 INFO L349 Elim1Store]: treesize reduction 56, result has 48.1 percent of original size [2023-11-23 21:12:31,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 23830 treesize of output 23407 [2023-11-23 21:12:53,629 WARN L293 SmtUtils]: Spent 21.62s on a formula simplification. DAG size of input: 57 DAG size of output: 47 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-23 21:12:53,629 INFO L349 Elim1Store]: treesize reduction 50, result has 59.7 percent of original size [2023-11-23 21:12:53,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39513 treesize of output 30647 [2023-11-23 21:13:04,561 WARN L293 SmtUtils]: Spent 10.74s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-23 21:13:04,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:13:04,563 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 21070 treesize of output 18958