./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --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 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 03:10:40,289 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 03:10:40,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 03:10:40,363 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 03:10:40,363 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 03:10:40,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 03:10:40,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 03:10:40,388 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 03:10:40,388 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 03:10:40,389 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 03:10:40,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 03:10:40,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 03:10:40,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 03:10:40,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 03:10:40,390 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 03:10:40,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 03:10:40,391 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 03:10:40,391 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 03:10:40,391 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 03:10:40,392 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 03:10:40,392 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 03:10:40,392 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 03:10:40,392 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 03:10:40,393 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 03:10:40,393 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 03:10:40,393 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 03:10:40,393 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 03:10:40,393 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 03:10:40,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 03:10:40,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 03:10:40,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 03:10:40,394 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 03:10:40,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:10:40,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 03:10:40,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 03:10:40,395 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 03:10:40,395 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 03:10:40,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 03:10:40,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 03:10:40,396 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 03:10:40,396 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 03:10:40,396 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 03:10:40,397 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:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 35431d6758accd7fd2ee5ddf2b1a76a0fd5efeada0a27759fb5cb6b7d4ed3c08 [2024-10-11 03:10:40,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 03:10:40,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 03:10:40,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 03:10:40,648 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 03:10:40,648 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 03:10:40,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-10-11 03:10:41,954 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 03:10:42,098 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 03:10:42,100 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c [2024-10-11 03:10:42,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/eb7c7f4a6/d50f02d4115b454a81b35df884f31fa7/FLAG287fe913e [2024-10-11 03:10:42,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/eb7c7f4a6/d50f02d4115b454a81b35df884f31fa7 [2024-10-11 03:10:42,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 03:10:42,128 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 03:10:42,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 03:10:42,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 03:10:42,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 03:10:42,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d783259 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42, skipping insertion in model container [2024-10-11 03:10:42,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,155 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 03:10:42,309 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-10-11 03:10:42,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:10:42,330 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 03:10:42,339 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_ps4-ll.c[987,1000] [2024-10-11 03:10:42,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:10:42,361 INFO L204 MainTranslator]: Completed translation [2024-10-11 03:10:42,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42 WrapperNode [2024-10-11 03:10:42,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 03:10:42,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 03:10:42,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 03:10:42,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 03:10:42,369 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,377 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,398 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2024-10-11 03:10:42,399 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 03:10:42,399 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 03:10:42,399 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 03:10:42,399 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 03:10:42,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,409 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,424 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 4, 5, 27, 3]. 66 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 2, 2, 2, 1]. [2024-10-11 03:10:42,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,429 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,432 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,433 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,435 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 03:10:42,435 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 03:10:42,436 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 03:10:42,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 03:10:42,436 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (1/1) ... [2024-10-11 03:10:42,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:10:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:42,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 03:10:42,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 03:10:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 03:10:42,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-11 03:10:42,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 03:10:42,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2024-10-11 03:10:42,515 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 03:10:42,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 03:10:42,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 03:10:42,591 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 03:10:42,593 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 03:10:42,741 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-10-11 03:10:42,741 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 03:10:42,777 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 03:10:42,778 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 03:10:42,778 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:10:42 BoogieIcfgContainer [2024-10-11 03:10:42,780 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 03:10:42,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 03:10:42,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 03:10:42,786 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 03:10:42,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 03:10:42" (1/3) ... [2024-10-11 03:10:42,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d71fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:10:42, skipping insertion in model container [2024-10-11 03:10:42,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:10:42" (2/3) ... [2024-10-11 03:10:42,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71d71fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:10:42, skipping insertion in model container [2024-10-11 03:10:42,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:10:42" (3/3) ... [2024-10-11 03:10:42,788 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2024-10-11 03:10:42,803 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 03:10:42,804 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 03:10:42,857 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 03:10:42,862 INFO L333 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, 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;@5fab9e01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 03:10:42,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 03:10:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 03:10:42,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 03:10:42,872 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:42,873 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:42,873 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:42,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:42,879 INFO L85 PathProgramCache]: Analyzing trace with hash -32795157, now seen corresponding path program 1 times [2024-10-11 03:10:42,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:42,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280718976] [2024-10-11 03:10:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:42,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:43,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [79728466] [2024-10-11 03:10:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:43,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:43,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:43,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 03:10:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:10:43,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-11 03:10:43,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:43,205 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 [2024-10-11 03:10:43,216 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 [2024-10-11 03:10:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:10:43,357 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 03:10:43,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:10:43,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280718976] [2024-10-11 03:10:43,359 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:10:43,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79728466] [2024-10-11 03:10:43,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79728466] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:10:43,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:10:43,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 03:10:43,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769954125] [2024-10-11 03:10:43,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:10:43,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:10:43,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:10:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:10:43,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 03:10:43,388 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 03:10:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:10:43,579 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2024-10-11 03:10:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 03:10:43,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 03:10:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:10:43,588 INFO L225 Difference]: With dead ends: 56 [2024-10-11 03:10:43,588 INFO L226 Difference]: Without dead ends: 34 [2024-10-11 03:10:43,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:10:43,595 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 03:10:43,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 85 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 03:10:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-11 03:10:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-10-11 03:10:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-11 03:10:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-10-11 03:10:43,632 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2024-10-11 03:10:43,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:10:43,632 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-10-11 03:10:43,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 03:10:43,632 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-10-11 03:10:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 03:10:43,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:43,633 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:43,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 03:10:43,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-10-11 03:10:43,835 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:43,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash -354243652, now seen corresponding path program 1 times [2024-10-11 03:10:43,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:43,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336691210] [2024-10-11 03:10:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:43,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111661035] [2024-10-11 03:10:43,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:43,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:43,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:43,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:43,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 03:10:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:10:44,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-11 03:10:44,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:44,012 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 [2024-10-11 03:10:44,016 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 [2024-10-11 03:10:44,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:10:44,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:10:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:10:44,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:10:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 03:10:44,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:10:44,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336691210] [2024-10-11 03:10:44,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:10:44,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111661035] [2024-10-11 03:10:44,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111661035] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:10:44,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:10:44,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2024-10-11 03:10:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124999103] [2024-10-11 03:10:44,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:10:44,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 03:10:44,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:10:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 03:10:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-11 03:10:44,555 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 15 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:10:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:10:44,995 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-10-11 03:10:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 03:10:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-11 03:10:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:10:45,001 INFO L225 Difference]: With dead ends: 61 [2024-10-11 03:10:45,001 INFO L226 Difference]: Without dead ends: 59 [2024-10-11 03:10:45,002 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-10-11 03:10:45,003 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:10:45,004 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 107 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:10:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-11 03:10:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2024-10-11 03:10:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-10-11 03:10:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2024-10-11 03:10:45,022 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 18 [2024-10-11 03:10:45,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:10:45,023 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2024-10-11 03:10:45,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:10:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2024-10-11 03:10:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 03:10:45,024 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:45,024 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:45,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-11 03:10:45,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:45,228 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:45,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1904549241, now seen corresponding path program 1 times [2024-10-11 03:10:45,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:45,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433855126] [2024-10-11 03:10:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:45,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373850762] [2024-10-11 03:10:45,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:45,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:45,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:45,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:45,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 03:10:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:10:45,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 03:10:45,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:45,342 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 [2024-10-11 03:10:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:10:45,388 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 03:10:45,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:10:45,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433855126] [2024-10-11 03:10:45,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:10:45,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373850762] [2024-10-11 03:10:45,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373850762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:10:45,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:10:45,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 03:10:45,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861051411] [2024-10-11 03:10:45,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:10:45,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 03:10:45,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:10:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 03:10:45,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-11 03:10:45,390 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:10:45,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:10:45,489 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2024-10-11 03:10:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 03:10:45,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-10-11 03:10:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:10:45,491 INFO L225 Difference]: With dead ends: 58 [2024-10-11 03:10:45,491 INFO L226 Difference]: Without dead ends: 56 [2024-10-11 03:10:45,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 03:10:45,493 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 03:10:45,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 03:10:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-10-11 03:10:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-10-11 03:10:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-10-11 03:10:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-10-11 03:10:45,512 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 18 [2024-10-11 03:10:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:10:45,512 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-10-11 03:10:45,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:10:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-10-11 03:10:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 03:10:45,513 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:45,514 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:45,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 03:10:45,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:45,718 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:45,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:45,719 INFO L85 PathProgramCache]: Analyzing trace with hash -956929769, now seen corresponding path program 1 times [2024-10-11 03:10:45,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:45,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781820354] [2024-10-11 03:10:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:45,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:45,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702116040] [2024-10-11 03:10:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:45,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:45,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:45,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:45,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 03:10:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:10:45,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 03:10:45,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:45,837 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 [2024-10-11 03:10:45,847 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 [2024-10-11 03:10:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 03:10:45,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:10:46,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:10:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781820354] [2024-10-11 03:10:46,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:10:46,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702116040] [2024-10-11 03:10:46,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702116040] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:10:46,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:10:46,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-11 03:10:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212150154] [2024-10-11 03:10:46,160 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:10:46,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:10:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:10:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:10:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-11 03:10:46,164 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:10:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:10:46,344 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2024-10-11 03:10:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 03:10:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-11 03:10:46,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:10:46,345 INFO L225 Difference]: With dead ends: 63 [2024-10-11 03:10:46,345 INFO L226 Difference]: Without dead ends: 47 [2024-10-11 03:10:46,346 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-11 03:10:46,346 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 03:10:46,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 95 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 03:10:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-10-11 03:10:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-10-11 03:10:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1) internal successors, (33), 32 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-10-11 03:10:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-10-11 03:10:46,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 24 [2024-10-11 03:10:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:10:46,355 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-10-11 03:10:46,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:10:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-10-11 03:10:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-11 03:10:46,356 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:46,356 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:46,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 03:10:46,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:46,561 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:46,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:46,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2114078499, now seen corresponding path program 1 times [2024-10-11 03:10:46,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:46,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226084058] [2024-10-11 03:10:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:46,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:46,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267194764] [2024-10-11 03:10:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:46,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:46,605 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:46,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 03:10:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:10:46,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-11 03:10:46,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:46,702 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 [2024-10-11 03:10:46,707 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 [2024-10-11 03:10:46,716 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 [2024-10-11 03:10:46,905 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 13 treesize of output 9 [2024-10-11 03:10:47,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:10:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 03:10:47,118 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:10:47,793 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 53 treesize of output 37 [2024-10-11 03:10:47,799 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 37 treesize of output 33 [2024-10-11 03:10:52,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:10:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226084058] [2024-10-11 03:10:52,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:10:52,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267194764] [2024-10-11 03:10:52,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267194764] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:10:52,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:10:52,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-11 03:10:52,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086089750] [2024-10-11 03:10:52,114 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:10:52,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 03:10:52,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:10:52,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 03:10:52,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=437, Unknown=1, NotChecked=0, Total=506 [2024-10-11 03:10:52,115 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 03:10:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:10:52,501 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-10-11 03:10:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 03:10:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2024-10-11 03:10:52,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:10:52,503 INFO L225 Difference]: With dead ends: 56 [2024-10-11 03:10:52,503 INFO L226 Difference]: Without dead ends: 54 [2024-10-11 03:10:52,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=102, Invalid=653, Unknown=1, NotChecked=0, Total=756 [2024-10-11 03:10:52,504 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:10:52,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:10:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-10-11 03:10:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-10-11 03:10:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-10-11 03:10:52,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-10-11 03:10:52,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 30 [2024-10-11 03:10:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:10:52,515 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-10-11 03:10:52,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-11 03:10:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-10-11 03:10:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-11 03:10:52,516 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:52,516 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:52,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 03:10:52,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:52,716 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:52,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash -525408077, now seen corresponding path program 1 times [2024-10-11 03:10:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:52,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332967470] [2024-10-11 03:10:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:52,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043571173] [2024-10-11 03:10:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:52,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:52,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:52,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:52,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 03:10:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:10:52,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-10-11 03:10:52,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:52,871 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 [2024-10-11 03:10:52,874 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 [2024-10-11 03:10:53,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:10:53,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:10:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 03:10:53,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:10:53,550 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 60 treesize of output 56 [2024-10-11 03:10:53,557 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 56 treesize of output 20 [2024-10-11 03:10:53,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:10:53,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332967470] [2024-10-11 03:10:53,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:10:53,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043571173] [2024-10-11 03:10:53,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043571173] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:10:53,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:10:53,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-10-11 03:10:53,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563841506] [2024-10-11 03:10:53,704 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:10:53,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 03:10:53,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:10:53,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 03:10:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-10-11 03:10:53,705 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 03:10:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:10:54,024 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2024-10-11 03:10:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 03:10:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2024-10-11 03:10:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:10:54,025 INFO L225 Difference]: With dead ends: 61 [2024-10-11 03:10:54,025 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 03:10:54,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-11 03:10:54,026 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:10:54,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 211 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:10:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 03:10:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-10-11 03:10:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-10-11 03:10:54,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-10-11 03:10:54,038 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 36 [2024-10-11 03:10:54,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:10:54,038 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-10-11 03:10:54,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-11 03:10:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-10-11 03:10:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 03:10:54,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:54,041 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:54,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 03:10:54,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 03:10:54,242 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:54,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:54,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1208091455, now seen corresponding path program 2 times [2024-10-11 03:10:54,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:54,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110995848] [2024-10-11 03:10:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:54,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447206841] [2024-10-11 03:10:54,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:10:54,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:54,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:54,280 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:54,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 03:10:54,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:10:54,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:10:54,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-10-11 03:10:54,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:54,414 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 [2024-10-11 03:10:54,422 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 [2024-10-11 03:10:54,424 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 [2024-10-11 03:10:54,592 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 13 treesize of output 9 [2024-10-11 03:10:54,744 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 13 treesize of output 9 [2024-10-11 03:10:54,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:10:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-11 03:10:55,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:10:56,429 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 55 treesize of output 51 [2024-10-11 03:10:56,435 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 51 treesize of output 35 [2024-10-11 03:10:56,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:10:56,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110995848] [2024-10-11 03:10:56,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:10:56,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447206841] [2024-10-11 03:10:56,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447206841] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:10:56,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:10:56,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-10-11 03:10:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37968758] [2024-10-11 03:10:56,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:10:56,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 03:10:56,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:10:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 03:10:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2024-10-11 03:10:56,855 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-11 03:10:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:10:57,327 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2024-10-11 03:10:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 03:10:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2024-10-11 03:10:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:10:57,328 INFO L225 Difference]: With dead ends: 54 [2024-10-11 03:10:57,328 INFO L226 Difference]: Without dead ends: 52 [2024-10-11 03:10:57,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2024-10-11 03:10:57,329 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:10:57,330 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 73 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:10:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-10-11 03:10:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2024-10-11 03:10:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2024-10-11 03:10:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-10-11 03:10:57,337 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 42 [2024-10-11 03:10:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:10:57,338 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-10-11 03:10:57,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-11 03:10:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-10-11 03:10:57,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 03:10:57,339 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:10:57,339 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:10:57,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 03:10:57,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:57,540 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:10:57,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:10:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1965061851, now seen corresponding path program 3 times [2024-10-11 03:10:57,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:10:57,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245551813] [2024-10-11 03:10:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:10:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:10:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:10:57,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71546559] [2024-10-11 03:10:57,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 03:10:57,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:10:57,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:10:57,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:10:57,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 03:10:57,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 03:10:57,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:10:57,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-10-11 03:10:57,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:10:57,810 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 [2024-10-11 03:10:57,813 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 [2024-10-11 03:10:57,817 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 [2024-10-11 03:10:58,036 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 33 treesize of output 24 [2024-10-11 03:10:58,205 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 13 treesize of output 9 [2024-10-11 03:10:58,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:10:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-11 03:10:58,592 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:01,057 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 55 treesize of output 51 [2024-10-11 03:11:01,069 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 51 treesize of output 35 [2024-10-11 03:11:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245551813] [2024-10-11 03:11:01,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:11:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71546559] [2024-10-11 03:11:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71546559] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:01,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:11:01,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-10-11 03:11:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951639638] [2024-10-11 03:11:01,895 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:01,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 03:11:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 03:11:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2024-10-11 03:11:01,896 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 03:11:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:02,475 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2024-10-11 03:11:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 03:11:02,476 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2024-10-11 03:11:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:02,476 INFO L225 Difference]: With dead ends: 62 [2024-10-11 03:11:02,477 INFO L226 Difference]: Without dead ends: 60 [2024-10-11 03:11:02,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2024-10-11 03:11:02,477 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:02,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 91 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:11:02,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-11 03:11:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2024-10-11 03:11:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-10-11 03:11:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-10-11 03:11:02,486 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 54 [2024-10-11 03:11:02,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:02,486 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-10-11 03:11:02,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-10-11 03:11:02,486 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-10-11 03:11:02,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-11 03:11:02,487 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:02,487 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:02,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 03:11:02,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-11 03:11:02,689 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:02,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1567882761, now seen corresponding path program 4 times [2024-10-11 03:11:02,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:02,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577746308] [2024-10-11 03:11:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:02,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:11:02,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15139319] [2024-10-11 03:11:02,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 03:11:02,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:02,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:02,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:11:02,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 03:11:03,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 03:11:03,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:11:03,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 205 conjuncts are in the unsatisfiable core [2024-10-11 03:11:03,186 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:03,192 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 [2024-10-11 03:11:03,194 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 [2024-10-11 03:11:03,198 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 [2024-10-11 03:11:03,677 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 13 treesize of output 9 [2024-10-11 03:11:04,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:11:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-10-11 03:11:04,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:06,369 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 55 treesize of output 51 [2024-10-11 03:11:06,376 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 51 treesize of output 35 [2024-10-11 03:11:07,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:07,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577746308] [2024-10-11 03:11:07,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:11:07,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15139319] [2024-10-11 03:11:07,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15139319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:07,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:11:07,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-10-11 03:11:07,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282763769] [2024-10-11 03:11:07,442 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:07,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 03:11:07,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 03:11:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-10-11 03:11:07,444 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-11 03:11:08,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:08,206 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2024-10-11 03:11:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 03:11:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 66 [2024-10-11 03:11:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:08,207 INFO L225 Difference]: With dead ends: 64 [2024-10-11 03:11:08,207 INFO L226 Difference]: Without dead ends: 62 [2024-10-11 03:11:08,207 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 03:11:08,208 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:08,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 03:11:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-11 03:11:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2024-10-11 03:11:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) [2024-10-11 03:11:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-10-11 03:11:08,216 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 66 [2024-10-11 03:11:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:08,216 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-10-11 03:11:08,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 7 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-10-11 03:11:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-10-11 03:11:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-11 03:11:08,219 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:08,219 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:08,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-11 03:11:08,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:08,419 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:08,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash -870309937, now seen corresponding path program 2 times [2024-10-11 03:11:08,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:08,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265682005] [2024-10-11 03:11:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:08,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:11:08,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482851920] [2024-10-11 03:11:08,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:11:08,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:08,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:08,456 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:11:08,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 03:11:08,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:11:08,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:11:08,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-10-11 03:11:08,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:08,617 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 [2024-10-11 03:11:08,621 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 [2024-10-11 03:11:08,863 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 37 treesize of output 28 [2024-10-11 03:11:08,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:11:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-11 03:11:08,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:14,467 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 60 treesize of output 56 [2024-10-11 03:11:14,475 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 56 treesize of output 20 [2024-10-11 03:11:34,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265682005] [2024-10-11 03:11:34,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:11:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482851920] [2024-10-11 03:11:34,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482851920] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:34,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:11:34,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-10-11 03:11:34,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944171156] [2024-10-11 03:11:34,492 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:34,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 03:11:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:34,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 03:11:34,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=286, Unknown=1, NotChecked=0, Total=342 [2024-10-11 03:11:34,493 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 03:11:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:35,749 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2024-10-11 03:11:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 03:11:35,750 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2024-10-11 03:11:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:35,751 INFO L225 Difference]: With dead ends: 69 [2024-10-11 03:11:35,751 INFO L226 Difference]: Without dead ends: 55 [2024-10-11 03:11:35,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=81, Invalid=424, Unknown=1, NotChecked=0, Total=506 [2024-10-11 03:11:35,751 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:35,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 67 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:11:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-11 03:11:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-10-11 03:11:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2024-10-11 03:11:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2024-10-11 03:11:35,764 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 48 [2024-10-11 03:11:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:35,764 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2024-10-11 03:11:35,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.4) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-11 03:11:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2024-10-11 03:11:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-10-11 03:11:35,765 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:35,765 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:35,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 03:11:35,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 03:11:35,967 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:35,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1879374701, now seen corresponding path program 5 times [2024-10-11 03:11:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:35,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184662417] [2024-10-11 03:11:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:11:36,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460943379] [2024-10-11 03:11:36,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 03:11:36,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:36,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:36,037 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:11:36,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 03:11:37,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-11 03:11:37,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:11:37,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 223 conjuncts are in the unsatisfiable core [2024-10-11 03:11:37,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:37,103 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 [2024-10-11 03:11:37,107 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 [2024-10-11 03:11:37,110 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 [2024-10-11 03:11:37,220 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 33 treesize of output 24 [2024-10-11 03:11:37,638 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 13 treesize of output 9 [2024-10-11 03:11:38,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:11:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-10-11 03:11:38,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:41,608 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 55 treesize of output 39 [2024-10-11 03:11:41,614 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 39 treesize of output 35 [2024-10-11 03:11:43,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:11:43,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184662417] [2024-10-11 03:11:43,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:11:43,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460943379] [2024-10-11 03:11:43,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460943379] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:11:43,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:11:43,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-10-11 03:11:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446903978] [2024-10-11 03:11:43,394 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:11:43,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 03:11:43,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:11:43,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 03:11:43,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2024-10-11 03:11:43,395 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 20 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-11 03:11:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:11:44,265 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2024-10-11 03:11:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 03:11:44,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 78 [2024-10-11 03:11:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:11:44,268 INFO L225 Difference]: With dead ends: 66 [2024-10-11 03:11:44,268 INFO L226 Difference]: Without dead ends: 64 [2024-10-11 03:11:44,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 03:11:44,269 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 03:11:44,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 137 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 03:11:44,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-11 03:11:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2024-10-11 03:11:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 11 states have return successors, (21), 12 states have call predecessors, (21), 8 states have call successors, (21) [2024-10-11 03:11:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2024-10-11 03:11:44,287 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 78 [2024-10-11 03:11:44,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:11:44,288 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2024-10-11 03:11:44,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 7 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-11 03:11:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2024-10-11 03:11:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-11 03:11:44,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:11:44,291 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:11:44,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-10-11 03:11:44,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 03:11:44,491 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:11:44,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:11:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash -743936405, now seen corresponding path program 3 times [2024-10-11 03:11:44,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:11:44,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962798233] [2024-10-11 03:11:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:11:44,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:11:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:11:44,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1197818147] [2024-10-11 03:11:44,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 03:11:44,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:11:44,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:11:44,531 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 03:11:44,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 03:11:44,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-11 03:11:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:11:44,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-10-11 03:11:44,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:11:44,855 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 [2024-10-11 03:11:44,859 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 [2024-10-11 03:11:50,042 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 37 treesize of output 28 [2024-10-11 03:11:50,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-11 03:11:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-10-11 03:11:50,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:11:51,911 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 60 treesize of output 56 [2024-10-11 03:11:51,920 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 56 treesize of output 20