./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_egcd-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_egcd-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 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 03:08:22,839 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 03:08:22,910 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 03:08:22,915 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 03:08:22,915 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 03:08:22,951 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 03:08:22,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 03:08:22,953 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 03:08:22,954 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 03:08:22,955 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 03:08:22,955 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 03:08:22,956 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 03:08:22,957 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 03:08:22,957 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 03:08:22,959 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 03:08:22,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 03:08:22,960 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 03:08:22,960 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 03:08:22,960 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 03:08:22,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 03:08:22,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 03:08:22,961 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 03:08:22,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 03:08:22,965 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 03:08:22,965 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 03:08:22,966 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 03:08:22,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 03:08:22,966 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 03:08:22,966 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 03:08:22,966 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 03:08:22,967 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 03:08:22,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 03:08:22,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:08:22,967 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 03:08:22,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 03:08:22,968 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 03:08:22,968 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 03:08:22,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 03:08:22,969 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 03:08:22,969 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 03:08:22,969 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 03:08:22,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 03:08:22,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 494d69f416dd1b0b56dc0371ee72744b83dbc298da37778d271d6f779b4cdcdc [2024-10-11 03:08:23,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 03:08:23,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 03:08:23,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 03:08:23,286 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 03:08:23,287 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 03:08:23,288 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-10-11 03:08:24,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 03:08:24,932 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 03:08:24,934 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_egcd-ll.c [2024-10-11 03:08:24,946 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/649d90d5c/7ce20d528d6a4cfbb1c7dbfe3f08b423/FLAGf67bc2b9a [2024-10-11 03:08:24,957 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/649d90d5c/7ce20d528d6a4cfbb1c7dbfe3f08b423 [2024-10-11 03:08:24,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 03:08:24,960 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 03:08:24,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 03:08:24,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 03:08:24,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 03:08:24,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:08:24" (1/1) ... [2024-10-11 03:08:24,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58119ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:24, skipping insertion in model container [2024-10-11 03:08:24,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 03:08:24" (1/1) ... [2024-10-11 03:08:24,996 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 03:08:25,178 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_egcd-ll.c[1019,1032] [2024-10-11 03:08:25,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:08:25,213 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 03:08:25,224 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_egcd-ll.c[1019,1032] [2024-10-11 03:08:25,240 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 03:08:25,255 INFO L204 MainTranslator]: Completed translation [2024-10-11 03:08:25,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25 WrapperNode [2024-10-11 03:08:25,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 03:08:25,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 03:08:25,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 03:08:25,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 03:08:25,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,284 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,304 INFO L138 Inliner]: procedures = 16, calls = 106, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2024-10-11 03:08:25,304 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 03:08:25,305 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 03:08:25,305 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 03:08:25,305 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 03:08:25,315 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,315 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,319 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,340 INFO L175 MemorySlicer]: Split 66 memory accesses to 9 slices as follows [2, 10, 8, 8, 7, 7, 8, 8, 8]. 15 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0, 0]. The 14 writes are split as follows [0, 2, 2, 2, 1, 1, 2, 2, 2]. [2024-10-11 03:08:25,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 03:08:25,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 03:08:25,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 03:08:25,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 03:08:25,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (1/1) ... [2024-10-11 03:08:25,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 03:08:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:25,397 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 03:08:25,399 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 03:08:25,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 03:08:25,445 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_48_0 [2024-10-11 03:08:25,445 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_48_0 [2024-10-11 03:08:25,445 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-11 03:08:25,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-11 03:08:25,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 03:08:25,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 03:08:25,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 03:08:25,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 03:08:25,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-11 03:08:25,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 03:08:25,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 03:08:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-11 03:08:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-11 03:08:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-11 03:08:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-11 03:08:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-10-11 03:08:25,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 03:08:25,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 03:08:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 03:08:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 03:08:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 03:08:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 03:08:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-11 03:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-11 03:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-11 03:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-11 03:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-10-11 03:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-11 03:08:25,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-11 03:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 03:08:25,562 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 03:08:25,565 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 03:08:25,832 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-10-11 03:08:25,833 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 03:08:25,863 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 03:08:25,863 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-11 03:08:25,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:08:25 BoogieIcfgContainer [2024-10-11 03:08:25,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 03:08:25,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 03:08:25,866 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 03:08:25,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 03:08:25,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 03:08:24" (1/3) ... [2024-10-11 03:08:25,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37018b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:08:25, skipping insertion in model container [2024-10-11 03:08:25,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 03:08:25" (2/3) ... [2024-10-11 03:08:25,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37018b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 03:08:25, skipping insertion in model container [2024-10-11 03:08:25,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 03:08:25" (3/3) ... [2024-10-11 03:08:25,872 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_egcd-ll.c [2024-10-11 03:08:25,890 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 03:08:25,891 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 03:08:25,943 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 03:08:25,949 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;@755c079d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 03:08:25,950 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-11 03:08:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-11 03:08:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 03:08:25,960 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:25,961 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:25,961 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:25,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1393043311, now seen corresponding path program 1 times [2024-10-11 03:08:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:25,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204445300] [2024-10-11 03:08:25,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:25,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:26,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:08:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:26,294 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:08:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:26,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:26,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204445300] [2024-10-11 03:08:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204445300] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:26,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 03:08:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987705385] [2024-10-11 03:08:26,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:26,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-11 03:08:26,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:26,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-11 03:08:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 03:08:26,365 INFO L87 Difference]: Start difference. First operand has 39 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:08:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:26,408 INFO L93 Difference]: Finished difference Result 76 states and 110 transitions. [2024-10-11 03:08:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-11 03:08:26,411 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-10-11 03:08:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:26,421 INFO L225 Difference]: With dead ends: 76 [2024-10-11 03:08:26,421 INFO L226 Difference]: Without dead ends: 37 [2024-10-11 03:08:26,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-11 03:08:26,431 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:26,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 03:08:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-11 03:08:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-11 03:08:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-11 03:08:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-10-11 03:08:26,481 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2024-10-11 03:08:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:26,482 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-10-11 03:08:26,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-11 03:08:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-10-11 03:08:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-11 03:08:26,485 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:26,485 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:26,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 03:08:26,486 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:26,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2014640661, now seen corresponding path program 1 times [2024-10-11 03:08:26,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:26,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47993589] [2024-10-11 03:08:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:26,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254340460] [2024-10-11 03:08:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:26,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:26,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:26,618 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 03:08:26,620 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 03:08:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:26,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-11 03:08:26,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:26,877 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 03:08:26,889 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 03:08:26,899 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 03:08:26,911 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 03:08:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:27,121 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 03:08:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47993589] [2024-10-11 03:08:27,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:27,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254340460] [2024-10-11 03:08:27,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254340460] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:27,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:27,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 03:08:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219583209] [2024-10-11 03:08:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:27,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:08:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:08:27,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-11 03:08:27,127 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 03:08:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:27,446 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2024-10-11 03:08:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 03:08:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-10-11 03:08:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:27,448 INFO L225 Difference]: With dead ends: 60 [2024-10-11 03:08:27,449 INFO L226 Difference]: Without dead ends: 58 [2024-10-11 03:08:27,451 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:08:27,452 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:27,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 196 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:08:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-11 03:08:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-10-11 03:08:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-11 03:08:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2024-10-11 03:08:27,476 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 20 [2024-10-11 03:08:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:27,476 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2024-10-11 03:08:27,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-11 03:08:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2024-10-11 03:08:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 03:08:27,477 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:27,477 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:27,495 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 03:08:27,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:27,680 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:27,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:27,680 INFO L85 PathProgramCache]: Analyzing trace with hash -989224114, now seen corresponding path program 1 times [2024-10-11 03:08:27,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:27,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962693839] [2024-10-11 03:08:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:27,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:27,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035659942] [2024-10-11 03:08:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:27,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:27,783 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 03:08:27,787 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 03:08:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:27,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-11 03:08:27,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:27,965 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 03:08:27,970 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 03:08:27,985 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 03:08:27,993 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 11 [2024-10-11 03:08:28,001 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 03:08:28,232 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 7 treesize of output 3 [2024-10-11 03:08:28,238 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 19 treesize of output 11 [2024-10-11 03:08:28,245 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 15 treesize of output 7 [2024-10-11 03:08:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:28,296 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 03:08:28,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:28,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962693839] [2024-10-11 03:08:28,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:28,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035659942] [2024-10-11 03:08:28,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035659942] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:28,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:28,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-10-11 03:08:28,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150876799] [2024-10-11 03:08:28,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:28,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:08:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:08:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-11 03:08:28,574 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:29,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:29,204 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2024-10-11 03:08:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 03:08:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-10-11 03:08:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:29,207 INFO L225 Difference]: With dead ends: 74 [2024-10-11 03:08:29,208 INFO L226 Difference]: Without dead ends: 72 [2024-10-11 03:08:29,208 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-10-11 03:08:29,209 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:29,210 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 03:08:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-11 03:08:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-10-11 03:08:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 47 states have internal predecessors, (50), 18 states have call successors, (18), 7 states have call predecessors, (18), 8 states have return successors, (21), 17 states have call predecessors, (21), 17 states have call successors, (21) [2024-10-11 03:08:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2024-10-11 03:08:29,227 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 26 [2024-10-11 03:08:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:29,228 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2024-10-11 03:08:29,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-11 03:08:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2024-10-11 03:08:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-11 03:08:29,229 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:29,229 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:29,249 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 03:08:29,430 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:29,430 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:29,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1390773957, now seen corresponding path program 1 times [2024-10-11 03:08:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:29,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975746624] [2024-10-11 03:08:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:29,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:29,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427669308] [2024-10-11 03:08:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:29,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:29,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:29,517 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 03:08:29,519 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 03:08:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:29,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-11 03:08:29,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:29,659 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 03:08:29,667 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 11 [2024-10-11 03:08:29,674 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 03:08:29,685 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 03:08:29,953 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 19 treesize of output 11 [2024-10-11 03:08:29,958 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 15 treesize of output 7 [2024-10-11 03:08:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-11 03:08:30,002 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975746624] [2024-10-11 03:08:30,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427669308] [2024-10-11 03:08:30,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427669308] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:30,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:30,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-11 03:08:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856088322] [2024-10-11 03:08:30,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:30,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 03:08:30,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:30,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 03:08:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:08:30,166 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 03:08:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:30,556 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2024-10-11 03:08:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 03:08:30,557 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-10-11 03:08:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:30,559 INFO L225 Difference]: With dead ends: 120 [2024-10-11 03:08:30,559 INFO L226 Difference]: Without dead ends: 118 [2024-10-11 03:08:30,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-11 03:08:30,560 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:30,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 159 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:08:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-10-11 03:08:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2024-10-11 03:08:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 71 states have internal predecessors, (77), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (31), 25 states have call predecessors, (31), 24 states have call successors, (31) [2024-10-11 03:08:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2024-10-11 03:08:30,603 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 32 [2024-10-11 03:08:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:30,603 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2024-10-11 03:08:30,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-11 03:08:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2024-10-11 03:08:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-11 03:08:30,605 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:30,605 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:30,623 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 03:08:30,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:30,811 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:30,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2034600058, now seen corresponding path program 1 times [2024-10-11 03:08:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:30,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533926591] [2024-10-11 03:08:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:31,137 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-11 03:08:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:31,142 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-11 03:08:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:31,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-11 03:08:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:31,318 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-11 03:08:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:31,324 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-11 03:08:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:31,330 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-11 03:08:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 03:08:31,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:31,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533926591] [2024-10-11 03:08:31,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533926591] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 03:08:31,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 03:08:31,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-11 03:08:31,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377158278] [2024-10-11 03:08:31,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 03:08:31,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 03:08:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 03:08:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-11 03:08:31,340 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 03:08:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:31,762 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2024-10-11 03:08:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 03:08:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-10-11 03:08:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:31,764 INFO L225 Difference]: With dead ends: 119 [2024-10-11 03:08:31,764 INFO L226 Difference]: Without dead ends: 117 [2024-10-11 03:08:31,765 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-10-11 03:08:31,766 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:31,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 109 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:08:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-10-11 03:08:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-10-11 03:08:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.135135135135135) internal successors, (84), 78 states have internal predecessors, (84), 26 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2024-10-11 03:08:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2024-10-11 03:08:31,794 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 42 [2024-10-11 03:08:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:31,795 INFO L471 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2024-10-11 03:08:31,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2024-10-11 03:08:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2024-10-11 03:08:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 03:08:31,797 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:31,797 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:31,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 03:08:31,797 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:31,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:31,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1212698772, now seen corresponding path program 1 times [2024-10-11 03:08:31,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:31,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621058976] [2024-10-11 03:08:31,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:31,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:31,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1127092482] [2024-10-11 03:08:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:31,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:31,861 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 03:08:31,862 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 03:08:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:32,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-10-11 03:08:32,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:32,039 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 03:08:32,044 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 03:08:32,050 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 03:08:32,055 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 03:08:32,448 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 03:08:32,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-11 03:08:32,541 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 17 treesize of output 9 [2024-10-11 03:08:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 03:08:32,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:53,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:53,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621058976] [2024-10-11 03:08:53,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127092482] [2024-10-11 03:08:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127092482] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:53,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:53,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-11 03:08:53,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594293225] [2024-10-11 03:08:53,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:53,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 03:08:53,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:53,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 03:08:53,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=163, Unknown=5, NotChecked=0, Total=210 [2024-10-11 03:08:53,508 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 03:08:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:54,052 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2024-10-11 03:08:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 03:08:54,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-10-11 03:08:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:54,055 INFO L225 Difference]: With dead ends: 133 [2024-10-11 03:08:54,055 INFO L226 Difference]: Without dead ends: 131 [2024-10-11 03:08:54,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=97, Invalid=318, Unknown=5, NotChecked=0, Total=420 [2024-10-11 03:08:54,057 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 55 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:54,057 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 237 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:08:54,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-10-11 03:08:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2024-10-11 03:08:54,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 77 states have (on average 1.12987012987013) internal successors, (87), 81 states have internal predecessors, (87), 26 states have call successors, (26), 14 states have call predecessors, (26), 17 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2024-10-11 03:08:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 145 transitions. [2024-10-11 03:08:54,086 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 145 transitions. Word has length 43 [2024-10-11 03:08:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:54,086 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 145 transitions. [2024-10-11 03:08:54,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 03:08:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 145 transitions. [2024-10-11 03:08:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-11 03:08:54,087 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:54,087 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, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:54,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 03:08:54,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-11 03:08:54,288 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:54,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 403352146, now seen corresponding path program 1 times [2024-10-11 03:08:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:54,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246678080] [2024-10-11 03:08:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:54,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:54,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909047347] [2024-10-11 03:08:54,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:54,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:54,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:54,344 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 03:08:54,361 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 03:08:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:54,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-11 03:08:54,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:54,535 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 03:08:54,538 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 03:08:54,542 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 03:08:54,787 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 03:08:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-11 03:08:54,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:55,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246678080] [2024-10-11 03:08:55,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:55,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909047347] [2024-10-11 03:08:55,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909047347] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:55,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:55,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-10-11 03:08:55,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997044906] [2024-10-11 03:08:55,117 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:55,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 03:08:55,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:55,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 03:08:55,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-10-11 03:08:55,118 INFO L87 Difference]: Start difference. First operand 121 states and 145 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 03:08:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:55,412 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2024-10-11 03:08:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 03:08:55,412 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2024-10-11 03:08:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:55,414 INFO L225 Difference]: With dead ends: 167 [2024-10-11 03:08:55,414 INFO L226 Difference]: Without dead ends: 165 [2024-10-11 03:08:55,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-10-11 03:08:55,415 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:55,415 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 190 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:08:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-10-11 03:08:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2024-10-11 03:08:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 103 states have (on average 1.116504854368932) internal successors, (115), 107 states have internal predecessors, (115), 34 states have call successors, (34), 20 states have call predecessors, (34), 23 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-10-11 03:08:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 187 transitions. [2024-10-11 03:08:55,456 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 187 transitions. Word has length 43 [2024-10-11 03:08:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:55,457 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 187 transitions. [2024-10-11 03:08:55,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-11 03:08:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 187 transitions. [2024-10-11 03:08:55,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-10-11 03:08:55,458 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:55,459 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:55,477 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 03:08:55,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:55,660 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:55,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash -806435587, now seen corresponding path program 1 times [2024-10-11 03:08:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:55,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965592571] [2024-10-11 03:08:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:55,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:55,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435504950] [2024-10-11 03:08:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:55,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:55,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:55,716 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 03:08:55,718 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 03:08:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:08:55,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-10-11 03:08:55,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:55,870 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 03:08:55,875 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 15 treesize of output 11 [2024-10-11 03:08:55,878 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 03:08:55,881 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 11 [2024-10-11 03:08:55,889 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 03:08:55,915 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 11 treesize of output 7 [2024-10-11 03:08:56,012 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 19 treesize of output 11 [2024-10-11 03:08:56,141 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 19 treesize of output 11 [2024-10-11 03:08:56,144 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 15 treesize of output 7 [2024-10-11 03:08:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 03:08:56,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965592571] [2024-10-11 03:08:56,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435504950] [2024-10-11 03:08:56,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435504950] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:08:56,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:08:56,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-10-11 03:08:56,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902639723] [2024-10-11 03:08:56,380 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:56,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 03:08:56,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 03:08:56,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-11 03:08:56,381 INFO L87 Difference]: Start difference. First operand 161 states and 187 transitions. Second operand has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-11 03:08:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:08:56,987 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2024-10-11 03:08:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 03:08:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 48 [2024-10-11 03:08:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:08:56,989 INFO L225 Difference]: With dead ends: 169 [2024-10-11 03:08:56,991 INFO L226 Difference]: Without dead ends: 167 [2024-10-11 03:08:56,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-10-11 03:08:56,993 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 03:08:56,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 118 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 03:08:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-10-11 03:08:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2024-10-11 03:08:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 110 states have internal predecessors, (118), 34 states have call successors, (34), 21 states have call predecessors, (34), 24 states have return successors, (38), 33 states have call predecessors, (38), 30 states have call successors, (38) [2024-10-11 03:08:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 190 transitions. [2024-10-11 03:08:57,049 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 190 transitions. Word has length 48 [2024-10-11 03:08:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:08:57,050 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 190 transitions. [2024-10-11 03:08:57,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-10-11 03:08:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 190 transitions. [2024-10-11 03:08:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-11 03:08:57,051 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:08:57,051 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:08:57,071 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 03:08:57,251 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,SelfDestructingSolverStorable7 [2024-10-11 03:08:57,252 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:08:57,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:08:57,252 INFO L85 PathProgramCache]: Analyzing trace with hash -115614067, now seen corresponding path program 2 times [2024-10-11 03:08:57,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:08:57,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931850827] [2024-10-11 03:08:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:08:57,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:08:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:08:57,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218483174] [2024-10-11 03:08:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:08:57,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:08:57,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:08:57,288 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 03:08:57,289 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 03:08:57,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:08:57,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:08:57,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-10-11 03:08:57,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:08:57,501 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 03:08:57,503 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 03:08:57,511 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 03:08:57,514 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 03:08:57,518 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 11 [2024-10-11 03:08:57,523 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 03:08:57,530 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 03:08:57,536 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 11 [2024-10-11 03:08:58,124 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 03:08:58,128 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 13 [2024-10-11 03:08:58,134 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 35 treesize of output 21 [2024-10-11 03:08:58,138 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 29 treesize of output 21 [2024-10-11 03:08:58,334 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 25 treesize of output 17 [2024-10-11 03:08:58,338 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 21 treesize of output 13 [2024-10-11 03:08:58,341 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 17 treesize of output 9 [2024-10-11 03:08:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 03:08:58,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:08:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 03:08:58,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:08:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931850827] [2024-10-11 03:08:58,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:08:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218483174] [2024-10-11 03:08:58,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218483174] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:08:58,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:08:58,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2024-10-11 03:08:58,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695373131] [2024-10-11 03:08:58,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:08:58,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 03:08:58,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:08:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 03:08:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2024-10-11 03:08:58,959 INFO L87 Difference]: Start difference. First operand 165 states and 190 transitions. Second operand has 22 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (16), 9 states have call predecessors, (16), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-11 03:09:02,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-10-11 03:09:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:03,324 INFO L93 Difference]: Finished difference Result 266 states and 314 transitions. [2024-10-11 03:09:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 03:09:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (16), 9 states have call predecessors, (16), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 49 [2024-10-11 03:09:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:03,327 INFO L225 Difference]: With dead ends: 266 [2024-10-11 03:09:03,327 INFO L226 Difference]: Without dead ends: 264 [2024-10-11 03:09:03,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 03:09:03,329 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 129 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:03,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 389 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-11 03:09:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-10-11 03:09:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 241. [2024-10-11 03:09:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 155 states have (on average 1.1096774193548387) internal successors, (172), 161 states have internal predecessors, (172), 46 states have call successors, (46), 31 states have call predecessors, (46), 39 states have return successors, (64), 48 states have call predecessors, (64), 41 states have call successors, (64) [2024-10-11 03:09:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 282 transitions. [2024-10-11 03:09:03,383 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 282 transitions. Word has length 49 [2024-10-11 03:09:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:03,387 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 282 transitions. [2024-10-11 03:09:03,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (16), 9 states have call predecessors, (16), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-10-11 03:09:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 282 transitions. [2024-10-11 03:09:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 03:09:03,388 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:03,388 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:03,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 03:09:03,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:03,589 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:03,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash -820896706, now seen corresponding path program 1 times [2024-10-11 03:09:03,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:03,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908161979] [2024-10-11 03:09:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:03,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:03,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825038771] [2024-10-11 03:09:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:03,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:03,638 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 03:09:03,640 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 03:09:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:03,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 03:09:03,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:03,839 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 03:09:03,843 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 03:09:03,849 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 03:09:03,855 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 03:09:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-11 03:09:04,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:04,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:04,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908161979] [2024-10-11 03:09:04,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:04,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825038771] [2024-10-11 03:09:04,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825038771] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:04,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:04,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-11 03:09:04,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693374231] [2024-10-11 03:09:04,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:04,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:09:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:09:04,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-10-11 03:09:04,587 INFO L87 Difference]: Start difference. First operand 241 states and 282 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 03:09:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:04,950 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2024-10-11 03:09:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 03:09:04,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2024-10-11 03:09:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:04,953 INFO L225 Difference]: With dead ends: 249 [2024-10-11 03:09:04,953 INFO L226 Difference]: Without dead ends: 245 [2024-10-11 03:09:04,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-11 03:09:04,954 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:04,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 98 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 03:09:04,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-10-11 03:09:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 243. [2024-10-11 03:09:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 157 states have (on average 1.1019108280254777) internal successors, (173), 162 states have internal predecessors, (173), 46 states have call successors, (46), 32 states have call predecessors, (46), 39 states have return successors, (64), 48 states have call predecessors, (64), 41 states have call successors, (64) [2024-10-11 03:09:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 283 transitions. [2024-10-11 03:09:04,999 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 283 transitions. Word has length 54 [2024-10-11 03:09:04,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:04,999 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 283 transitions. [2024-10-11 03:09:04,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-10-11 03:09:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 283 transitions. [2024-10-11 03:09:05,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 03:09:05,000 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:05,000 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:05,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 03:09:05,202 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,SelfDestructingSolverStorable9 [2024-10-11 03:09:05,202 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:05,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:05,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1794391166, now seen corresponding path program 2 times [2024-10-11 03:09:05,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:05,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857150328] [2024-10-11 03:09:05,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:05,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:05,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404649357] [2024-10-11 03:09:05,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 03:09:05,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:05,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:05,255 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 03:09:05,256 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 03:09:05,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 03:09:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 03:09:05,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-10-11 03:09:05,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:05,482 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 03:09:05,485 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 03:09:05,529 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 11 [2024-10-11 03:09:05,537 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 03:09:05,544 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 03:09:05,549 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 11 [2024-10-11 03:09:05,555 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 03:09:05,562 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 03:09:06,306 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 58 treesize of output 36 [2024-10-11 03:09:06,310 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 52 treesize of output 36 [2024-10-11 03:09:06,329 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 03:09:06,339 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 13 [2024-10-11 03:09:06,814 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 25 treesize of output 17 [2024-10-11 03:09:06,818 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 31 [2024-10-11 03:09:06,822 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 32 treesize of output 16 [2024-10-11 03:09:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 03:09:06,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-11 03:09:07,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:07,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857150328] [2024-10-11 03:09:07,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404649357] [2024-10-11 03:09:07,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404649357] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:09:07,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:09:07,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 27 [2024-10-11 03:09:07,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801020275] [2024-10-11 03:09:07,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:07,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 03:09:07,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:07,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 03:09:07,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2024-10-11 03:09:07,947 INFO L87 Difference]: Start difference. First operand 243 states and 283 transitions. Second operand has 27 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-10-11 03:09:12,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 03:09:20,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-11 03:09:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:23,426 INFO L93 Difference]: Finished difference Result 366 states and 428 transitions. [2024-10-11 03:09:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-10-11 03:09:23,427 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 55 [2024-10-11 03:09:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:23,429 INFO L225 Difference]: With dead ends: 366 [2024-10-11 03:09:23,429 INFO L226 Difference]: Without dead ends: 364 [2024-10-11 03:09:23,432 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 11 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=530, Invalid=3376, Unknown=0, NotChecked=0, Total=3906 [2024-10-11 03:09:23,432 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 195 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 95 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:23,432 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 483 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1347 Invalid, 1 Unknown, 0 Unchecked, 11.0s Time] [2024-10-11 03:09:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-10-11 03:09:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 326. [2024-10-11 03:09:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 212 states have (on average 1.1037735849056605) internal successors, (234), 220 states have internal predecessors, (234), 58 states have call successors, (58), 44 states have call predecessors, (58), 55 states have return successors, (90), 61 states have call predecessors, (90), 53 states have call successors, (90) [2024-10-11 03:09:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 382 transitions. [2024-10-11 03:09:23,509 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 382 transitions. Word has length 55 [2024-10-11 03:09:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:23,510 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 382 transitions. [2024-10-11 03:09:23,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 11 states have call successors, (20), 9 states have call predecessors, (20), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-10-11 03:09:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 382 transitions. [2024-10-11 03:09:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-10-11 03:09:23,512 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:23,512 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:23,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 03:09:23,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:23,712 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:23,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1477707709, now seen corresponding path program 1 times [2024-10-11 03:09:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551009568] [2024-10-11 03:09:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:23,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686254952] [2024-10-11 03:09:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:23,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:23,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:23,752 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 03:09:23,753 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 03:09:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:23,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 03:09:23,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:23,919 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 03:09:23,923 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 03:09:23,928 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 11 [2024-10-11 03:09:23,932 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 03:09:23,948 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 11 treesize of output 7 [2024-10-11 03:09:24,178 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 19 treesize of output 11 [2024-10-11 03:09:24,180 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 15 treesize of output 7 [2024-10-11 03:09:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 03:09:24,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:24,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551009568] [2024-10-11 03:09:24,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:24,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686254952] [2024-10-11 03:09:24,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686254952] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:24,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:24,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-10-11 03:09:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173379195] [2024-10-11 03:09:24,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:24,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 03:09:24,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 03:09:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-11 03:09:24,301 INFO L87 Difference]: Start difference. First operand 326 states and 382 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-11 03:09:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:24,733 INFO L93 Difference]: Finished difference Result 359 states and 422 transitions. [2024-10-11 03:09:24,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 03:09:24,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2024-10-11 03:09:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:24,735 INFO L225 Difference]: With dead ends: 359 [2024-10-11 03:09:24,736 INFO L226 Difference]: Without dead ends: 327 [2024-10-11 03:09:24,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-10-11 03:09:24,737 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:24,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 74 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 220 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:09:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-10-11 03:09:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 323. [2024-10-11 03:09:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 208 states have (on average 1.1057692307692308) internal successors, (230), 217 states have internal predecessors, (230), 58 states have call successors, (58), 42 states have call predecessors, (58), 56 states have return successors, (97), 63 states have call predecessors, (97), 53 states have call successors, (97) [2024-10-11 03:09:24,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 385 transitions. [2024-10-11 03:09:24,806 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 385 transitions. Word has length 60 [2024-10-11 03:09:24,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:24,806 INFO L471 AbstractCegarLoop]: Abstraction has 323 states and 385 transitions. [2024-10-11 03:09:24,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-10-11 03:09:24,806 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 385 transitions. [2024-10-11 03:09:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-10-11 03:09:24,807 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:24,808 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:24,826 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 03:09:25,008 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,SelfDestructingSolverStorable11 [2024-10-11 03:09:25,008 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:25,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:25,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1228698867, now seen corresponding path program 1 times [2024-10-11 03:09:25,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:25,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369667903] [2024-10-11 03:09:25,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:25,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:25,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875165802] [2024-10-11 03:09:25,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:25,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:25,073 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 03:09:25,074 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 03:09:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:25,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 151 conjuncts are in the unsatisfiable core [2024-10-11 03:09:25,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:25,299 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 03:09:25,302 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 03:09:25,306 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 03:09:25,311 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 03:09:25,608 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 13 [2024-10-11 03:09:25,615 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 03:09:25,952 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 13 [2024-10-11 03:09:25,958 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 03:09:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-11 03:09:26,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-10-11 03:09:26,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:26,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369667903] [2024-10-11 03:09:26,530 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:26,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875165802] [2024-10-11 03:09:26,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875165802] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 03:09:26,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 03:09:26,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2024-10-11 03:09:26,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257671958] [2024-10-11 03:09:26,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:26,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 03:09:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 03:09:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-10-11 03:09:26,532 INFO L87 Difference]: Start difference. First operand 323 states and 385 transitions. Second operand has 18 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-11 03:09:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:27,933 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2024-10-11 03:09:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 03:09:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2024-10-11 03:09:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:27,936 INFO L225 Difference]: With dead ends: 371 [2024-10-11 03:09:27,936 INFO L226 Difference]: Without dead ends: 369 [2024-10-11 03:09:27,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 102 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-10-11 03:09:27,939 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 63 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:27,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 404 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-10-11 03:09:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-10-11 03:09:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 315. [2024-10-11 03:09:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 204 states have (on average 1.1029411764705883) internal successors, (225), 214 states have internal predecessors, (225), 54 states have call successors, (54), 42 states have call predecessors, (54), 56 states have return successors, (99), 58 states have call predecessors, (99), 51 states have call successors, (99) [2024-10-11 03:09:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 378 transitions. [2024-10-11 03:09:28,030 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 378 transitions. Word has length 66 [2024-10-11 03:09:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:28,031 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 378 transitions. [2024-10-11 03:09:28,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-10-11 03:09:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 378 transitions. [2024-10-11 03:09:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-11 03:09:28,032 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:28,032 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:28,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 03:09:28,232 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,SelfDestructingSolverStorable12 [2024-10-11 03:09:28,232 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:28,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:28,233 INFO L85 PathProgramCache]: Analyzing trace with hash -220579539, now seen corresponding path program 1 times [2024-10-11 03:09:28,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:28,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058497799] [2024-10-11 03:09:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:28,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:28,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1142054435] [2024-10-11 03:09:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:28,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:28,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:28,281 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 03:09:28,283 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 03:09:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:28,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 138 conjuncts are in the unsatisfiable core [2024-10-11 03:09:28,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:28,488 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 03:09:28,508 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 03:09:28,512 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 03:09:28,516 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 03:09:28,521 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 11 [2024-10-11 03:09:28,526 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 03:09:28,532 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 11 [2024-10-11 03:09:28,558 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 11 treesize of output 7 [2024-10-11 03:09:28,566 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 11 treesize of output 7 [2024-10-11 03:09:29,518 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 13 [2024-10-11 03:09:29,522 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 03:09:29,533 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 35 treesize of output 21 [2024-10-11 03:09:29,567 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 25 treesize of output 17 [2024-10-11 03:09:29,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:29,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2024-10-11 03:09:29,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:29,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 73 [2024-10-11 03:09:29,855 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 17 treesize of output 9 [2024-10-11 03:09:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-11 03:09:29,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:31,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058497799] [2024-10-11 03:09:31,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:31,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142054435] [2024-10-11 03:09:31,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142054435] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:31,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-10-11 03:09:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566611062] [2024-10-11 03:09:31,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:31,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 03:09:31,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:31,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 03:09:31,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2024-10-11 03:09:31,758 INFO L87 Difference]: Start difference. First operand 315 states and 378 transitions. Second operand has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-11 03:09:35,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-11 03:09:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:37,312 INFO L93 Difference]: Finished difference Result 339 states and 402 transitions. [2024-10-11 03:09:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 03:09:37,313 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 73 [2024-10-11 03:09:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:37,315 INFO L225 Difference]: With dead ends: 339 [2024-10-11 03:09:37,315 INFO L226 Difference]: Without dead ends: 335 [2024-10-11 03:09:37,316 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 03:09:37,316 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:37,317 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 151 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 778 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-10-11 03:09:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-10-11 03:09:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2024-10-11 03:09:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 215 states have (on average 1.0976744186046512) internal successors, (236), 224 states have internal predecessors, (236), 57 states have call successors, (57), 45 states have call predecessors, (57), 58 states have return successors, (101), 61 states have call predecessors, (101), 53 states have call successors, (101) [2024-10-11 03:09:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 394 transitions. [2024-10-11 03:09:37,443 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 394 transitions. Word has length 73 [2024-10-11 03:09:37,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:37,444 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 394 transitions. [2024-10-11 03:09:37,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-10-11 03:09:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 394 transitions. [2024-10-11 03:09:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-10-11 03:09:37,445 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:37,445 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:37,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 03:09:37,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 03:09:37,652 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:37,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1249938837, now seen corresponding path program 1 times [2024-10-11 03:09:37,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:37,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025950938] [2024-10-11 03:09:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:37,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:37,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043363989] [2024-10-11 03:09:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:37,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:37,709 INFO L229 MonitoredProcess]: Starting monitored process 14 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 03:09:37,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 03:09:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:37,878 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-10-11 03:09:37,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:37,883 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 03:09:37,886 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 03:09:37,888 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 11 [2024-10-11 03:09:37,892 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 03:09:37,897 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 11 [2024-10-11 03:09:37,910 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 11 treesize of output 7 [2024-10-11 03:09:37,918 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 11 treesize of output 7 [2024-10-11 03:09:38,249 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 58 treesize of output 36 [2024-10-11 03:09:38,298 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 36 treesize of output 24 [2024-10-11 03:09:38,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:38,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2024-10-11 03:09:38,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:38,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 72 [2024-10-11 03:09:38,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 03:09:38,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2024-10-11 03:09:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-10-11 03:09:38,713 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:39,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025950938] [2024-10-11 03:09:39,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:39,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043363989] [2024-10-11 03:09:39,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043363989] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:39,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:39,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-10-11 03:09:39,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248587814] [2024-10-11 03:09:39,515 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:39,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 03:09:39,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:39,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 03:09:39,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2024-10-11 03:09:39,516 INFO L87 Difference]: Start difference. First operand 331 states and 394 transitions. Second operand has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-11 03:09:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:40,382 INFO L93 Difference]: Finished difference Result 357 states and 420 transitions. [2024-10-11 03:09:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 03:09:40,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2024-10-11 03:09:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:40,385 INFO L225 Difference]: With dead ends: 357 [2024-10-11 03:09:40,385 INFO L226 Difference]: Without dead ends: 355 [2024-10-11 03:09:40,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-10-11 03:09:40,386 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:40,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 128 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 580 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 03:09:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-10-11 03:09:40,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2024-10-11 03:09:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 229 states have (on average 1.0960698689956332) internal successors, (251), 238 states have internal predecessors, (251), 61 states have call successors, (61), 48 states have call predecessors, (61), 62 states have return successors, (105), 66 states have call predecessors, (105), 56 states have call successors, (105) [2024-10-11 03:09:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 417 transitions. [2024-10-11 03:09:40,492 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 417 transitions. Word has length 73 [2024-10-11 03:09:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:40,492 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 417 transitions. [2024-10-11 03:09:40,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-10-11 03:09:40,492 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 417 transitions. [2024-10-11 03:09:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-11 03:09:40,493 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:40,493 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:40,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 03:09:40,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:40,694 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:40,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:40,694 INFO L85 PathProgramCache]: Analyzing trace with hash 331459694, now seen corresponding path program 1 times [2024-10-11 03:09:40,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508169277] [2024-10-11 03:09:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:40,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390362123] [2024-10-11 03:09:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:40,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:40,732 INFO L229 MonitoredProcess]: Starting monitored process 15 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 03:09:40,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 03:09:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:40,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-10-11 03:09:40,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:40,952 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 03:09:40,957 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 03:09:40,964 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 03:09:40,969 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 03:09:41,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-11 03:09:41,395 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 03:09:41,545 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 17 treesize of output 9 [2024-10-11 03:09:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-11 03:09:41,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:48,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:48,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508169277] [2024-10-11 03:09:48,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:48,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390362123] [2024-10-11 03:09:48,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390362123] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:48,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:48,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-10-11 03:09:48,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112797990] [2024-10-11 03:09:48,451 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:48,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 03:09:48,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 03:09:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=125, Unknown=2, NotChecked=0, Total=156 [2024-10-11 03:09:48,452 INFO L87 Difference]: Start difference. First operand 353 states and 417 transitions. Second operand has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-11 03:09:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:48,976 INFO L93 Difference]: Finished difference Result 357 states and 421 transitions. [2024-10-11 03:09:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 03:09:48,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2024-10-11 03:09:48,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:48,979 INFO L225 Difference]: With dead ends: 357 [2024-10-11 03:09:48,979 INFO L226 Difference]: Without dead ends: 335 [2024-10-11 03:09:48,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=52, Invalid=218, Unknown=2, NotChecked=0, Total=272 [2024-10-11 03:09:48,980 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:48,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 122 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 325 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:09:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-10-11 03:09:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 333. [2024-10-11 03:09:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 216 states have (on average 1.0972222222222223) internal successors, (237), 225 states have internal predecessors, (237), 58 states have call successors, (58), 45 states have call predecessors, (58), 58 states have return successors, (101), 62 states have call predecessors, (101), 54 states have call successors, (101) [2024-10-11 03:09:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 396 transitions. [2024-10-11 03:09:49,081 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 396 transitions. Word has length 79 [2024-10-11 03:09:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:49,082 INFO L471 AbstractCegarLoop]: Abstraction has 333 states and 396 transitions. [2024-10-11 03:09:49,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2024-10-11 03:09:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 396 transitions. [2024-10-11 03:09:49,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-10-11 03:09:49,083 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:49,083 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:49,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 03:09:49,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 03:09:49,284 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:49,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1717928148, now seen corresponding path program 1 times [2024-10-11 03:09:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616801788] [2024-10-11 03:09:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:49,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187857763] [2024-10-11 03:09:49,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:49,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:49,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:49,315 INFO L229 MonitoredProcess]: Starting monitored process 16 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 03:09:49,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 03:09:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:49,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-10-11 03:09:49,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:49,526 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 03:09:49,529 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 03:09:49,533 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 03:09:49,735 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 03:09:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-10-11 03:09:49,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 03:09:50,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 03:09:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616801788] [2024-10-11 03:09:50,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-11 03:09:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187857763] [2024-10-11 03:09:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187857763] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 03:09:50,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-11 03:09:50,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-11 03:09:50,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710738975] [2024-10-11 03:09:50,054 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-11 03:09:50,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 03:09:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 03:09:50,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 03:09:50,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-10-11 03:09:50,055 INFO L87 Difference]: Start difference. First operand 333 states and 396 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-11 03:09:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 03:09:50,620 INFO L93 Difference]: Finished difference Result 361 states and 424 transitions. [2024-10-11 03:09:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 03:09:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2024-10-11 03:09:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 03:09:50,623 INFO L225 Difference]: With dead ends: 361 [2024-10-11 03:09:50,623 INFO L226 Difference]: Without dead ends: 357 [2024-10-11 03:09:50,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-10-11 03:09:50,623 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 03:09:50,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 103 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 293 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 03:09:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-10-11 03:09:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 355. [2024-10-11 03:09:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 231 states have (on average 1.0909090909090908) internal successors, (252), 239 states have internal predecessors, (252), 62 states have call successors, (62), 49 states have call predecessors, (62), 61 states have return successors, (104), 66 states have call predecessors, (104), 57 states have call successors, (104) [2024-10-11 03:09:50,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 418 transitions. [2024-10-11 03:09:50,762 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 418 transitions. Word has length 79 [2024-10-11 03:09:50,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 03:09:50,762 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 418 transitions. [2024-10-11 03:09:50,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 6 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-10-11 03:09:50,762 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 418 transitions. [2024-10-11 03:09:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-10-11 03:09:50,764 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 03:09:50,764 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 03:09:50,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 03:09:50,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 03:09:50,964 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 03:09:50,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 03:09:50,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1834352683, now seen corresponding path program 1 times [2024-10-11 03:09:50,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 03:09:50,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620239452] [2024-10-11 03:09:50,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:50,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 03:09:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-11 03:09:50,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455122601] [2024-10-11 03:09:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 03:09:50,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 03:09:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 03:09:50,994 INFO L229 MonitoredProcess]: Starting monitored process 17 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 03:09:50,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 03:09:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 03:09:51,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 140 conjuncts are in the unsatisfiable core [2024-10-11 03:09:51,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 03:09:51,249 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 03:09:51,253 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 03:09:51,258 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 03:09:51,263 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 03:09:51,268 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 11 [2024-10-11 03:09:51,273 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 11 [2024-10-11 03:09:51,292 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 11 treesize of output 7 [2024-10-11 03:09:51,299 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 11 treesize of output 7 [2024-10-11 03:09:52,302 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 03:09:52,306 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 58 treesize of output 36 [2024-10-11 03:09:52,319 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 13 [2024-10-11 03:09:52,356 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 59 treesize of output 39