./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5 --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 dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:53:46,311 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:53:46,419 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-21 19:53:46,428 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:53:46,429 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:53:46,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:53:46,470 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:53:46,471 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:53:46,472 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:53:46,477 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:53:46,478 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:53:46,478 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:53:46,478 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:53:46,480 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:53:46,480 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:53:46,481 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:53:46,481 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:53:46,482 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:53:46,482 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:53:46,484 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:53:46,484 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:53:46,485 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:53:46,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:53:46,486 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:53:46,487 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:53:46,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:53:46,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:53:46,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:53:46,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:53:46,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:53:46,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:53:46,490 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:53:46,491 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:53:46,491 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:53:46,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:53:46,491 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:53:46,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:53:46,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:53:46,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:53:46,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:53:46,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:53:46,494 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:53:46,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:53:46,494 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:53:46,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:53:46,495 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:53:46,495 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:53:46,495 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_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dea78793c7130d873f751539350d9a84f129d659be765f9ed3f85c683976c43a [2023-11-21 19:53:46,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:53:46,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:53:46,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:53:46,804 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:53:46,804 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:53:46,806 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2023-11-21 19:53:50,084 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:53:50,383 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:53:50,383 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c [2023-11-21 19:53:50,396 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/data/8649997b0/a55cc179431948b0ae530ca5d5c7d483/FLAG2d34e97d3 [2023-11-21 19:53:50,414 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/data/8649997b0/a55cc179431948b0ae530ca5d5c7d483 [2023-11-21 19:53:50,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:53:50,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:53:50,429 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:53:50,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:53:50,435 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:53:50,436 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59a540bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50, skipping insertion in model container [2023-11-21 19:53:50,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,475 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:53:50,714 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_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2023-11-21 19:53:50,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:53:50,775 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:53:50,800 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_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/sv-benchmarks/c/recursified_loop-simple/recursified_deep-nested.c[1440,1453] [2023-11-21 19:53:50,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:53:50,857 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:53:50,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50 WrapperNode [2023-11-21 19:53:50,858 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:53:50,860 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:53:50,860 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:53:50,860 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:53:50,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,915 INFO L138 Inliner]: procedures = 16, calls = 71, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2023-11-21 19:53:50,916 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:53:50,917 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:53:50,917 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:53:50,917 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:53:50,928 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,969 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:53:50,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:53:50,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:53:50,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:53:50,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (1/1) ... [2023-11-21 19:53:50,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:53:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:53:51,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:53:51,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:53:51,077 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_12_to_13_0 [2023-11-21 19:53:51,078 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_12_to_13_0 [2023-11-21 19:53:51,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:53:51,078 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_13_to_14_0 [2023-11-21 19:53:51,078 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_13_to_14_0 [2023-11-21 19:53:51,079 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_11_to_12_0 [2023-11-21 19:53:51,079 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_11_to_12_0 [2023-11-21 19:53:51,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:53:51,079 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_14_to_16_0 [2023-11-21 19:53:51,080 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_14_to_16_0 [2023-11-21 19:53:51,080 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_10_to_11_0 [2023-11-21 19:53:51,080 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_10_to_11_0 [2023-11-21 19:53:51,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:53:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:53:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:53:51,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:53:51,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:53:51,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:53:51,200 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:53:51,203 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:53:51,610 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:53:51,729 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:53:51,729 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:53:51,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:53:51 BoogieIcfgContainer [2023-11-21 19:53:51,732 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:53:51,734 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:53:51,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:53:51,738 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:53:51,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:53:50" (1/3) ... [2023-11-21 19:53:51,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a732140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:53:51, skipping insertion in model container [2023-11-21 19:53:51,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:50" (2/3) ... [2023-11-21 19:53:51,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a732140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:53:51, skipping insertion in model container [2023-11-21 19:53:51,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:53:51" (3/3) ... [2023-11-21 19:53:51,742 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_deep-nested.c [2023-11-21 19:53:51,765 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:53:51,766 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:53:51,823 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:53:51,832 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;@70a85b2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:53:51,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:53:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-11-21 19:53:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:53:51,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:53:51,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:53:51,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:53:51,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:53:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2117252113, now seen corresponding path program 1 times [2023-11-21 19:53:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:53:51,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889272967] [2023-11-21 19:53:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:53:51,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:53:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:53:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:53:55,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:53:55,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889272967] [2023-11-21 19:53:55,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889272967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:53:55,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:53:55,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-21 19:53:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346752546] [2023-11-21 19:53:55,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:53:55,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-21 19:53:55,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:53:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-21 19:53:55,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2023-11-21 19:53:55,795 INFO L87 Difference]: Start difference. First operand has 41 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 30 states have internal predecessors, (31), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 16 states, 13 states have (on average 1.0) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:53:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:53:56,559 INFO L93 Difference]: Finished difference Result 111 states and 154 transitions. [2023-11-21 19:53:56,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 19:53:56,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.0) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-21 19:53:56,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:53:56,577 INFO L225 Difference]: With dead ends: 111 [2023-11-21 19:53:56,578 INFO L226 Difference]: Without dead ends: 65 [2023-11-21 19:53:56,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-21 19:53:56,591 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:53:56,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 292 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 19:53:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-21 19:53:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2023-11-21 19:53:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 45 states have internal predecessors, (46), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (16), 8 states have call predecessors, (16), 12 states have call successors, (16) [2023-11-21 19:53:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2023-11-21 19:53:56,656 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 18 [2023-11-21 19:53:56,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:53:56,658 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2023-11-21 19:53:56,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.0) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:53:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2023-11-21 19:53:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 19:53:56,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:53:56,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:53:56,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:53:56,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:53:56,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:53:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash 200392441, now seen corresponding path program 1 times [2023-11-21 19:53:56,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:53:56,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562561663] [2023-11-21 19:53:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:53:56,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:53:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:53:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:53:58,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:53:58,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562561663] [2023-11-21 19:53:58,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562561663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:53:58,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439736490] [2023-11-21 19:53:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:53:58,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:53:58,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:53:58,549 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:53:58,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:53:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:53:58,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 175 conjunts are in the unsatisfiable core [2023-11-21 19:53:58,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:53:59,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:53:59,093 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 2945 treesize of output 2887 [2023-11-21 19:53:59,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 19:53:59,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 19:53:59,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-21 19:53:59,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-21 19:53:59,353 WARN L214 Elim1Store]: Array PQE input equivalent to false [2023-11-21 19:53:59,595 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-21 19:53:59,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 19:53:59,879 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-21 19:53:59,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 25 [2023-11-21 19:54:00,073 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-21 19:54:00,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 19:54:00,261 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 19:54:00,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-21 19:54:00,541 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-21 19:54:00,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2023-11-21 19:54:01,045 INFO L349 Elim1Store]: treesize reduction 12, result has 87.6 percent of original size [2023-11-21 19:54:01,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 127 treesize of output 187 [2023-11-21 19:54:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:54:01,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:06,329 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_int| c_func_to_recursive_line_11_to_12_0_~c.base v_ArrVal_87))) (store .cse2 c_func_to_recursive_line_11_to_12_0_~d.base (store (select .cse2 c_func_to_recursive_line_11_to_12_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 c_func_to_recursive_line_11_to_12_0_~e.base (store (select .cse1 c_func_to_recursive_line_11_to_12_0_~e.base) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (select (select .cse0 c_func_to_recursive_line_11_to_12_0_~b.base) c_func_to_recursive_line_11_to_12_0_~b.offset) 4294967296) 1)) (not (= (mod (+ (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset) 4294967294) 4294967296) 1)) (not (= (mod (select (select .cse0 c_func_to_recursive_line_11_to_12_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1))))) is different from false [2023-11-21 19:54:16,691 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_10_to_11_0_~b.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (store |c_#memory_int| c_func_to_recursive_line_10_to_11_0_~b.base (store (select |c_#memory_int| c_func_to_recursive_line_10_to_11_0_~b.base) func_to_recursive_line_10_to_11_0_~b.offset 0)) c_func_to_recursive_line_10_to_11_0_~c.base v_ArrVal_87))) (store .cse2 c_func_to_recursive_line_10_to_11_0_~d.base (store (select .cse2 c_func_to_recursive_line_10_to_11_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 c_func_to_recursive_line_10_to_11_0_~e.base (store (select .cse1 c_func_to_recursive_line_10_to_11_0_~e.base) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (+ 4294967294 (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset)) 4294967296) 1)) (not (= (mod (select (select .cse0 c_func_to_recursive_line_10_to_11_0_~d.base) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 c_func_to_recursive_line_10_to_11_0_~b.base) func_to_recursive_line_10_to_11_0_~b.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1))))) is different from false [2023-11-21 19:54:16,756 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_10_to_11_0_~b.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (store |c_#memory_int| |c_func_to_recursive_line_10_to_11_0_#in~b.base| (store (select |c_#memory_int| |c_func_to_recursive_line_10_to_11_0_#in~b.base|) func_to_recursive_line_10_to_11_0_~b.offset 0)) |c_func_to_recursive_line_10_to_11_0_#in~c.base| v_ArrVal_87))) (store .cse2 |c_func_to_recursive_line_10_to_11_0_#in~d.base| (store (select .cse2 |c_func_to_recursive_line_10_to_11_0_#in~d.base|) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 |c_func_to_recursive_line_10_to_11_0_#in~e.base| (store (select .cse1 |c_func_to_recursive_line_10_to_11_0_#in~e.base|) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (select (select .cse0 |c_func_to_recursive_line_10_to_11_0_#in~d.base|) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1)) (not (= (mod (+ 4294967294 (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset)) 4294967296) 1)) (not (= 1 (mod (select (select .cse0 |c_func_to_recursive_line_10_to_11_0_#in~b.base|) func_to_recursive_line_10_to_11_0_~b.offset) 4294967296)))))) is different from false [2023-11-21 19:54:16,821 WARN L854 $PredicateComparison]: unable to prove that (forall ((func_to_recursive_line_14_to_16_0_~uint32_max.offset Int) (func_to_recursive_line_14_to_16_0_~c.base Int) (v_ArrVal_87 (Array Int Int)) (func_to_recursive_line_14_to_16_0_~c.offset Int) (func_to_recursive_line_10_to_11_0_~b.offset Int) (func_to_recursive_line_14_to_16_0_~uint32_max.base Int) (func_to_recursive_line_13_to_14_0_~e.offset Int) (func_to_recursive_line_12_to_13_0_~d.offset Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) func_to_recursive_line_10_to_11_0_~b.offset 0)) |c_ULTIMATE.start_main_~#c~0#1.base| v_ArrVal_87))) (store .cse2 |c_ULTIMATE.start_main_~#d~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~#d~0#1.base|) func_to_recursive_line_12_to_13_0_~d.offset 0))))) (store .cse1 |c_ULTIMATE.start_main_~#e~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#e~0#1.base|) func_to_recursive_line_13_to_14_0_~e.offset 1))))) (or (not (= (mod (+ 4294967294 (select (select .cse0 func_to_recursive_line_14_to_16_0_~uint32_max.base) func_to_recursive_line_14_to_16_0_~uint32_max.offset)) 4294967296) 1)) (not (= (mod (select (select .cse0 |c_ULTIMATE.start_main_~#b~0#1.base|) func_to_recursive_line_10_to_11_0_~b.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 func_to_recursive_line_14_to_16_0_~c.base) func_to_recursive_line_14_to_16_0_~c.offset) 4294967296) 1)) (not (= (mod (select (select .cse0 |c_ULTIMATE.start_main_~#d~0#1.base|) func_to_recursive_line_12_to_13_0_~d.offset) 4294967296) 1))))) is different from false [2023-11-21 19:54:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:54:16,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439736490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:54:16,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [592859600] [2023-11-21 19:54:16,858 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-21 19:54:16,859 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:16,863 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-21 19:54:16,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 19:54:16,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2023-11-21 19:54:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247383721] [2023-11-21 19:54:16,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-21 19:54:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-21 19:54:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2242, Unknown=51, NotChecked=396, Total=2862 [2023-11-21 19:54:16,881 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 54 states, 40 states have (on average 1.175) internal successors, (47), 35 states have internal predecessors, (47), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:54:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:26,567 INFO L93 Difference]: Finished difference Result 118 states and 149 transitions. [2023-11-21 19:54:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-21 19:54:26,568 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 40 states have (on average 1.175) internal successors, (47), 35 states have internal predecessors, (47), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-21 19:54:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:26,572 INFO L225 Difference]: With dead ends: 118 [2023-11-21 19:54:26,572 INFO L226 Difference]: Without dead ends: 116 [2023-11-21 19:54:26,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=465, Invalid=5812, Unknown=59, NotChecked=636, Total=6972 [2023-11-21 19:54:26,577 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 153 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 479 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:26,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 538 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1099 Invalid, 0 Unknown, 479 Unchecked, 4.0s Time] [2023-11-21 19:54:26,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-21 19:54:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2023-11-21 19:54:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 78 states have internal predecessors, (81), 19 states have call successors, (19), 16 states have call predecessors, (19), 16 states have return successors, (30), 12 states have call predecessors, (30), 17 states have call successors, (30) [2023-11-21 19:54:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2023-11-21 19:54:26,604 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 23 [2023-11-21 19:54:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:26,605 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2023-11-21 19:54:26,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 40 states have (on average 1.175) internal successors, (47), 35 states have internal predecessors, (47), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:54:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2023-11-21 19:54:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-21 19:54:26,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:26,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:26,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:54:26,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:26,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION === [func_to_recursive_line_14_to_16_0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:26,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1001565442, now seen corresponding path program 1 times [2023-11-21 19:54:26,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:26,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138207763] [2023-11-21 19:54:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:26,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:54:30,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:30,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138207763] [2023-11-21 19:54:30,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138207763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:30,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639780158] [2023-11-21 19:54:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:30,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:30,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:30,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:30,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa0c7756-068f-4c24-ba86-40cd4c95c2fe/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:54:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:30,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 176 conjunts are in the unsatisfiable core [2023-11-21 19:54:30,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:54:30,416 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-21 19:54:30,417 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 47 treesize of output 43 [2023-11-21 19:54:30,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-21 19:54:30,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 19:54:30,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 19:54:30,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 19:54:31,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 19:54:31,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 19:54:31,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 19:54:31,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-11-21 19:54:32,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 19:54:32,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 61 [2023-11-21 19:54:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:54:32,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:54:40,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639780158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:40,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830440600] [2023-11-21 19:54:40,005 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-11-21 19:54:40,005 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:54:40,006 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-11-21 19:54:40,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 19:54:40,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2023-11-21 19:54:40,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111327647] [2023-11-21 19:54:40,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 19:54:40,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-21 19:54:40,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:40,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-21 19:54:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2164, Unknown=26, NotChecked=0, Total=2352 [2023-11-21 19:54:40,014 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand has 40 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 27 states have internal predecessors, (36), 13 states have call successors, (14), 13 states have call predecessors, (14), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)