./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34a8492e255374aad098e162859199083b5b90fe0eb733edf5e3563474d7ceaa --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:12:44,081 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:12:44,220 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:12:44,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:12:44,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:12:44,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:12:44,270 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:12:44,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:12:44,272 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:12:44,279 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:12:44,280 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:12:44,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:12:44,281 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:12:44,282 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:12:44,283 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:12:44,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:12:44,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:12:44,284 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:12:44,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:12:44,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:12:44,285 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:12:44,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:12:44,287 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:12:44,287 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:12:44,288 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:12:44,288 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:12:44,289 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:12:44,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:12:44,290 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:12:44,290 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:12:44,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:12:44,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:12:44,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:12:44,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:12:44,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:12:44,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:12:44,293 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:12:44,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:12:44,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:12:44,294 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:12:44,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:12:44,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:12:44,295 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34a8492e255374aad098e162859199083b5b90fe0eb733edf5e3563474d7ceaa [2023-11-21 22:12:44,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:12:44,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:12:44,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:12:44,659 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:12:44,659 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:12:44,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c [2023-11-21 22:12:47,595 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:12:47,829 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:12:47,830 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c [2023-11-21 22:12:47,837 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/data/695f31680/b9b5ceb2914049b09a6a82ba405dce50/FLAG28940985b [2023-11-21 22:12:47,851 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/data/695f31680/b9b5ceb2914049b09a6a82ba405dce50 [2023-11-21 22:12:47,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:12:47,856 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:12:47,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:12:47,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:12:47,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:12:47,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:12:47" (1/1) ... [2023-11-21 22:12:47,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a4c8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:47, skipping insertion in model container [2023-11-21 22:12:47,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:12:47" (1/1) ... [2023-11-21 22:12:47,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:12:48,088 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_eead0ea2-2c79-43f5-b291-534ff48b1abe/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c[1277,1290] [2023-11-21 22:12:48,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:12:48,102 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:12:48,114 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_eead0ea2-2c79-43f5-b291-534ff48b1abe/sv-benchmarks/c/recursified_loop-simple/recursified_nested_1.c[1277,1290] [2023-11-21 22:12:48,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:12:48,129 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:12:48,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48 WrapperNode [2023-11-21 22:12:48,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:12:48,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:12:48,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:12:48,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:12:48,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,159 INFO L138 Inliner]: procedures = 12, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-11-21 22:12:48,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:12:48,161 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:12:48,161 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:12:48,161 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:12:48,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,171 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,180 INFO L187 HeapSplitter]: Split 8 memory accesses to 2 slices as follows [2, 6] [2023-11-21 22:12:48,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,185 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,186 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:12:48,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:12:48,190 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:12:48,190 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:12:48,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (1/1) ... [2023-11-21 22:12:48,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:12:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:48,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:12:48,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:12:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:12:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:12:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:12:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_19_to_19_0 [2023-11-21 22:12:48,278 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_19_to_19_0 [2023-11-21 22:12:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:12:48,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:12:48,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:12:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:12:48,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:12:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:12:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:12:48,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:12:48,372 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:12:48,374 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:12:48,560 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:12:48,599 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:12:48,604 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 22:12:48,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:12:48 BoogieIcfgContainer [2023-11-21 22:12:48,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:12:48,611 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:12:48,612 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:12:48,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:12:48,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:12:47" (1/3) ... [2023-11-21 22:12:48,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e814d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:12:48, skipping insertion in model container [2023-11-21 22:12:48,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:12:48" (2/3) ... [2023-11-21 22:12:48,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e814d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:12:48, skipping insertion in model container [2023-11-21 22:12:48,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:12:48" (3/3) ... [2023-11-21 22:12:48,620 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_1.c [2023-11-21 22:12:48,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:12:48,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:12:48,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:12:48,702 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=PETRI_NET, 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;@18c0b3b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:12:48,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:12:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:12:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:12:48,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:48,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:12:48,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:48,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1146450700, now seen corresponding path program 1 times [2023-11-21 22:12:48,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:48,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008906055] [2023-11-21 22:12:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:48,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:49,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:12:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:49,230 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 22:12:49,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008906055] [2023-11-21 22:12:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008906055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:12:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:12:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:12:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433503530] [2023-11-21 22:12:49,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:12:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:12:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:49,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:12:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:12:49,268 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:12:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:12:49,364 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-21 22:12:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:12:49,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-21 22:12:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:12:49,375 INFO L225 Difference]: With dead ends: 21 [2023-11-21 22:12:49,375 INFO L226 Difference]: Without dead ends: 13 [2023-11-21 22:12:49,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:12:49,382 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:12:49,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:12:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-21 22:12:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-21 22:12:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 9 states have internal predecessors, (9), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:12:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-21 22:12:49,428 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-11-21 22:12:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:12:49,429 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-21 22:12:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:12:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-21 22:12:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:12:49,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:49,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:12:49,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:12:49,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:49,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1151650808, now seen corresponding path program 1 times [2023-11-21 22:12:49,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:49,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555750994] [2023-11-21 22:12:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:49,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:49,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:12:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:49,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:12:50,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:50,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555750994] [2023-11-21 22:12:50,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555750994] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:50,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161946785] [2023-11-21 22:12:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:50,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:50,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:50,098 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:50,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:12:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:50,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-21 22:12:50,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:50,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:12:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:12:50,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:12:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:12:51,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161946785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:12:51,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:12:51,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 22 [2023-11-21 22:12:51,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287771536] [2023-11-21 22:12:51,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:12:51,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-21 22:12:51,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:12:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-21 22:12:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-11-21 22:12:51,083 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:12:51,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:12:51,333 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-11-21 22:12:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:12:51,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 14 [2023-11-21 22:12:51,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:12:51,335 INFO L225 Difference]: With dead ends: 21 [2023-11-21 22:12:51,336 INFO L226 Difference]: Without dead ends: 17 [2023-11-21 22:12:51,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-11-21 22:12:51,339 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:12:51,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:12:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-21 22:12:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-21 22:12:51,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:12:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-21 22:12:51,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2023-11-21 22:12:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:12:51,352 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-21 22:12:51,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:12:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-21 22:12:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:12:51,354 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:12:51,355 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:12:51,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:12:51,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 22:12:51,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:12:51,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:12:51,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1489619010, now seen corresponding path program 2 times [2023-11-21 22:12:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:12:51,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306591367] [2023-11-21 22:12:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:12:51,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:12:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:51,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:12:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:52,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:52,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:52,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:12:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:12:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:12:52,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:12:52,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306591367] [2023-11-21 22:12:52,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306591367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:12:52,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795769498] [2023-11-21 22:12:52,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:12:52,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:12:52,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:12:52,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:12:52,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:12:52,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:12:52,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:12:52,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-21 22:12:52,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:12:52,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:12:52,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-21 22:12:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:12:52,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:12:53,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-21 22:13:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795769498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:00,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:13:00,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-11-21 22:13:00,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331794187] [2023-11-21 22:13:00,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:00,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 22:13:00,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 22:13:00,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=646, Unknown=3, NotChecked=0, Total=756 [2023-11-21 22:13:00,250 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 22:13:00,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:00,567 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-11-21 22:13:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:13:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 24 [2023-11-21 22:13:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:00,570 INFO L225 Difference]: With dead ends: 25 [2023-11-21 22:13:00,570 INFO L226 Difference]: Without dead ends: 21 [2023-11-21 22:13:00,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=172, Invalid=947, Unknown=3, NotChecked=0, Total=1122 [2023-11-21 22:13:00,572 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:00,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-21 22:13:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-21 22:13:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 22:13:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-21 22:13:00,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 24 [2023-11-21 22:13:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:00,585 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-21 22:13:00,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-21 22:13:00,586 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-21 22:13:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:13:00,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:00,587 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:00,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:00,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:00,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:00,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1362462852, now seen corresponding path program 3 times [2023-11-21 22:13:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159510260] [2023-11-21 22:13:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:01,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:13:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:01,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:02,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:02,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:02,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:02,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-21 22:13:02,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:02,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159510260] [2023-11-21 22:13:02,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159510260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:02,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227866960] [2023-11-21 22:13:02,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:13:02,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:02,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:02,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:02,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:13:02,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-21 22:13:02,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:02,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-21 22:13:02,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:02,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:13:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-21 22:13:03,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:13:05,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227866960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:05,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:05,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 25] total 43 [2023-11-21 22:13:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93561669] [2023-11-21 22:13:05,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-21 22:13:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:05,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-21 22:13:05,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2023-11-21 22:13:05,854 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 44 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2023-11-21 22:13:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:06,295 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-11-21 22:13:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:13:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) Word has length 34 [2023-11-21 22:13:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:06,297 INFO L225 Difference]: With dead ends: 27 [2023-11-21 22:13:06,297 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 22:13:06,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=487, Invalid=2165, Unknown=0, NotChecked=0, Total=2652 [2023-11-21 22:13:06,300 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:06,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:13:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 22:13:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-21 22:13:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-21 22:13:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-21 22:13:06,315 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 34 [2023-11-21 22:13:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:06,316 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-21 22:13:06,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (18), 12 states have call predecessors, (18), 11 states have call successors, (18) [2023-11-21 22:13:06,320 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-21 22:13:06,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:13:06,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:13:06,329 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:13:06,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:06,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:06,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:13:06,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:13:06,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2002779038, now seen corresponding path program 4 times [2023-11-21 22:13:06,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:13:06,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309705878] [2023-11-21 22:13:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:13:06,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:13:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:07,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:13:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:07,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:07,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:07,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:08,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:08,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:08,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:13:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:13:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-11-21 22:13:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:13:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309705878] [2023-11-21 22:13:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309705878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:13:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856258024] [2023-11-21 22:13:08,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:13:08,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:08,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:13:08,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:13:08,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:13:08,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:13:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:13:08,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-21 22:13:08,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:13:08,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-21 22:13:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-21 22:13:08,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:13:09,877 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-21 22:13:09,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 25 [2023-11-21 22:13:10,429 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-21 22:13:10,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 25 [2023-11-21 22:13:10,835 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-21 22:13:10,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 25 [2023-11-21 22:13:11,199 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-21 22:13:11,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 25 [2023-11-21 22:13:11,422 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-21 22:13:11,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 25 [2023-11-21 22:13:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-21 22:13:11,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856258024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:13:11,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:13:11,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 24 [2023-11-21 22:13:11,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039891384] [2023-11-21 22:13:11,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:13:11,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-21 22:13:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:13:11,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-21 22:13:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-11-21 22:13:11,818 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 24 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-21 22:13:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:13:12,102 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-11-21 22:13:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:13:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2023-11-21 22:13:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:13:12,103 INFO L225 Difference]: With dead ends: 23 [2023-11-21 22:13:12,103 INFO L226 Difference]: Without dead ends: 0 [2023-11-21 22:13:12,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-11-21 22:13:12,105 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:13:12,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:13:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-21 22:13:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-21 22:13:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:13:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-21 22:13:12,107 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2023-11-21 22:13:12,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:13:12,107 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-21 22:13:12,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (7), 3 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-21 22:13:12,108 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-21 22:13:12,108 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-21 22:13:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-21 22:13:12,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:13:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:13:12,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-21 22:13:12,343 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |func_to_recursive_line_19_to_19_0_#in~a.offset| func_to_recursive_line_19_to_19_0_~a.offset) (<= (select (select |#memory_int#1| func_to_recursive_line_19_to_19_0_~a.base) func_to_recursive_line_19_to_19_0_~a.offset) 6) (= (store |old(#memory_int#1)| func_to_recursive_line_19_to_19_0_~a.base (let ((.cse0 (select |old(#memory_int#1)| func_to_recursive_line_19_to_19_0_~a.base))) (store .cse0 func_to_recursive_line_19_to_19_0_~a.offset (+ (select .cse0 func_to_recursive_line_19_to_19_0_~a.offset) 1)))) |#memory_int#1|) (= |func_to_recursive_line_19_to_19_0_#in~a.base| func_to_recursive_line_19_to_19_0_~a.base)) [2023-11-21 22:13:12,343 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 23 37) the Hoare annotation is: (and (= |#memory_int#0| |old(#memory_int#0)|) (= |#memory_int#1| |old(#memory_int#1)|)) [2023-11-21 22:13:12,343 INFO L899 garLoopResultBuilder]: For program point L25(lines 25 36) no Hoare annotation was computed. [2023-11-21 22:13:12,343 INFO L899 garLoopResultBuilder]: For program point L25-1(lines 23 37) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point func_to_recursive_line_19_to_19_0EXIT(lines 23 37) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 48) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point L48(line 48) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point L46(lines 46 52) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (select (select |#memory_int#1| |ULTIMATE.start_main_~#a~0#1.base|) 0) 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0)) [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point L46-2(lines 46 52) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point L44-1(line 44) no Hoare annotation was computed. [2023-11-21 22:13:12,344 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-21 22:13:12,347 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1] [2023-11-21 22:13:12,349 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 22:13:12,353 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:13:12 BoogieIcfgContainer [2023-11-21 22:13:12,354 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 22:13:12,354 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 22:13:12,354 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 22:13:12,355 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 22:13:12,355 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:12:48" (3/4) ... [2023-11-21 22:13:12,357 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-21 22:13:12,361 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure func_to_recursive_line_19_to_19_0 [2023-11-21 22:13:12,366 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2023-11-21 22:13:12,366 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-21 22:13:12,366 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-21 22:13:12,367 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-21 22:13:12,454 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 22:13:12,455 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/witness.yml [2023-11-21 22:13:12,455 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 22:13:12,456 INFO L158 Benchmark]: Toolchain (without parser) took 24599.99ms. Allocated memory was 148.9MB in the beginning and 218.1MB in the end (delta: 69.2MB). Free memory was 113.6MB in the beginning and 97.3MB in the end (delta: 16.4MB). Peak memory consumption was 86.6MB. Max. memory is 16.1GB. [2023-11-21 22:13:12,456 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 88.3MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:13:12,457 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.50ms. Allocated memory is still 148.9MB. Free memory was 113.1MB in the beginning and 116.2MB in the end (delta: -3.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-21 22:13:12,457 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.29ms. Allocated memory is still 148.9MB. Free memory was 115.5MB in the beginning and 114.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:13:12,457 INFO L158 Benchmark]: Boogie Preprocessor took 28.50ms. Allocated memory is still 148.9MB. Free memory was 114.2MB in the beginning and 112.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:13:12,458 INFO L158 Benchmark]: RCFGBuilder took 417.12ms. Allocated memory is still 148.9MB. Free memory was 112.7MB in the beginning and 101.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 22:13:12,458 INFO L158 Benchmark]: TraceAbstraction took 23742.24ms. Allocated memory was 148.9MB in the beginning and 218.1MB in the end (delta: 69.2MB). Free memory was 100.9MB in the beginning and 101.5MB in the end (delta: -505.1kB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. [2023-11-21 22:13:12,458 INFO L158 Benchmark]: Witness Printer took 100.79ms. Allocated memory is still 218.1MB. Free memory was 101.5MB in the beginning and 97.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 22:13:12,461 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 88.3MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.50ms. Allocated memory is still 148.9MB. Free memory was 113.1MB in the beginning and 116.2MB in the end (delta: -3.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.29ms. Allocated memory is still 148.9MB. Free memory was 115.5MB in the beginning and 114.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.50ms. Allocated memory is still 148.9MB. Free memory was 114.2MB in the beginning and 112.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 417.12ms. Allocated memory is still 148.9MB. Free memory was 112.7MB in the beginning and 101.6MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 23742.24ms. Allocated memory was 148.9MB in the beginning and 218.1MB in the end (delta: 69.2MB). Free memory was 100.9MB in the beginning and 101.5MB in the end (delta: -505.1kB). Peak memory consumption was 71.7MB. Max. memory is 16.1GB. * Witness Printer took 100.79ms. Allocated memory is still 218.1MB. Free memory was 101.5MB in the beginning and 97.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 48]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.7s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 338 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 296 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 533 IncrementalHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 42 mSDtfsCounter, 533 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 310 GetRequests, 163 SyntacticMatches, 6 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 9.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 49 HoareAnnotationTreeSize, 5 FomulaSimplifications, 7 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 20.5s InterpolantComputationTime, 231 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 306 ConstructedInterpolants, 4 QuantifiedInterpolants, 3005 SizeOfPredicates, 47 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 225 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 319/573 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-21 22:13:12,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eead0ea2-2c79-43f5-b291-534ff48b1abe/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE