./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_hard-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 01:10:53,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 01:10:53,238 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 01:10:53,246 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 01:10:53,247 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 01:10:53,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 01:10:53,294 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 01:10:53,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 01:10:53,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 01:10:53,295 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 01:10:53,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 01:10:53,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 01:10:53,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 01:10:53,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 01:10:53,297 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 01:10:53,298 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 01:10:53,298 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 01:10:53,298 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 01:10:53,299 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 01:10:53,299 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 01:10:53,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 01:10:53,304 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 01:10:53,304 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 01:10:53,304 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 01:10:53,304 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 01:10:53,305 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 01:10:53,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 01:10:53,305 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 01:10:53,305 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 01:10:53,306 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 01:10:53,306 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 01:10:53,306 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 01:10:53,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 01:10:53,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 01:10:53,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 01:10:53,312 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 01:10:53,312 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 01:10:53,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 01:10:53,312 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 01:10:53,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 01:10:53,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 01:10:53,313 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 01:10:53,314 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 [2024-10-24 01:10:53,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 01:10:53,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 01:10:53,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 01:10:53,630 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 01:10:53,631 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 01:10:53,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-10-24 01:10:55,228 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 01:10:55,423 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 01:10:55,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-10-24 01:10:55,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3be472a5e/4bdf8516a99943918964495a10654cbd/FLAG9b411a5a4 [2024-10-24 01:10:55,450 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3be472a5e/4bdf8516a99943918964495a10654cbd [2024-10-24 01:10:55,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 01:10:55,455 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 01:10:55,456 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 01:10:55,456 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 01:10:55,462 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 01:10:55,463 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,463 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca16c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55, skipping insertion in model container [2024-10-24 01:10:55,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,491 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 01:10:55,696 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_hard-ll.c[1083,1096] [2024-10-24 01:10:55,735 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 01:10:55,749 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 01:10:55,763 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_hard-ll.c[1083,1096] [2024-10-24 01:10:55,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 01:10:55,809 INFO L204 MainTranslator]: Completed translation [2024-10-24 01:10:55,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55 WrapperNode [2024-10-24 01:10:55,811 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 01:10:55,812 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 01:10:55,812 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 01:10:55,812 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 01:10:55,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,832 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,859 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-10-24 01:10:55,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 01:10:55,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 01:10:55,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 01:10:55,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 01:10:55,872 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,876 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,898 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 9, 6, 5, 8, 7, 12]. 24 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 3, 2, 1, 2, 1, 3]. [2024-10-24 01:10:55,898 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,899 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,918 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 01:10:55,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 01:10:55,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 01:10:55,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 01:10:55,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (1/1) ... [2024-10-24 01:10:55,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 01:10:55,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:10:55,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 01:10:55,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 01:10:56,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 01:10:56,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 01:10:56,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 01:10:56,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 01:10:56,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 01:10:56,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-24 01:10:56,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-24 01:10:56,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-24 01:10:56,037 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-10-24 01:10:56,037 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-10-24 01:10:56,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 01:10:56,037 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-10-24 01:10:56,038 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-10-24 01:10:56,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 01:10:56,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 01:10:56,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 01:10:56,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 01:10:56,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-24 01:10:56,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-24 01:10:56,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-24 01:10:56,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 01:10:56,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 01:10:56,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 01:10:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 01:10:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 01:10:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 01:10:56,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-24 01:10:56,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-24 01:10:56,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-24 01:10:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 01:10:56,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 01:10:56,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 01:10:56,195 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 01:10:56,198 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 01:10:56,526 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-10-24 01:10:56,527 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 01:10:56,580 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 01:10:56,581 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 01:10:56,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:10:56 BoogieIcfgContainer [2024-10-24 01:10:56,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 01:10:56,584 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 01:10:56,585 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 01:10:56,591 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 01:10:56,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:10:55" (1/3) ... [2024-10-24 01:10:56,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e87853b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:10:56, skipping insertion in model container [2024-10-24 01:10:56,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:10:55" (2/3) ... [2024-10-24 01:10:56,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e87853b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:10:56, skipping insertion in model container [2024-10-24 01:10:56,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:10:56" (3/3) ... [2024-10-24 01:10:56,595 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-ll.c [2024-10-24 01:10:56,616 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 01:10:56,616 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 01:10:56,691 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 01:10:56,698 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;@51af1288, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 01:10:56,698 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 01:10:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 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) [2024-10-24 01:10:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-24 01:10:56,710 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:10:56,710 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:10:56,711 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:10:56,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:10:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1915466635, now seen corresponding path program 1 times [2024-10-24 01:10:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:10:56,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678387844] [2024-10-24 01:10:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:10:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:10:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:10:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 01:10:57,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:10:57,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678387844] [2024-10-24 01:10:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678387844] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 01:10:57,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 01:10:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 01:10:57,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892224957] [2024-10-24 01:10:57,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:10:57,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 01:10:57,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:10:57,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 01:10:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 01:10:57,552 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 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 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 01:10:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:10:57,799 INFO L93 Difference]: Finished difference Result 82 states and 120 transitions. [2024-10-24 01:10:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 01:10:57,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-10-24 01:10:57,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:10:57,811 INFO L225 Difference]: With dead ends: 82 [2024-10-24 01:10:57,812 INFO L226 Difference]: Without dead ends: 42 [2024-10-24 01:10:57,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-24 01:10:57,822 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 01:10:57,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 227 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 01:10:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-24 01:10:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-24 01:10:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 01:10:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-10-24 01:10:57,882 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 10 [2024-10-24 01:10:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:10:57,883 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-10-24 01:10:57,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 01:10:57,884 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-10-24 01:10:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-24 01:10:57,885 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:10:57,885 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:10:57,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 01:10:57,885 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:10:57,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:10:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash 880062118, now seen corresponding path program 1 times [2024-10-24 01:10:57,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:10:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597274735] [2024-10-24 01:10:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:10:57,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:10:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:10:58,599 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 01:10:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:10:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 01:10:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:10:58,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597274735] [2024-10-24 01:10:58,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597274735] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 01:10:58,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 01:10:58,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 01:10:58,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583761424] [2024-10-24 01:10:58,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:10:58,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 01:10:58,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:10:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 01:10:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-10-24 01:10:58,620 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 01:10:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:10:58,893 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2024-10-24 01:10:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 01:10:58,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-10-24 01:10:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:10:58,897 INFO L225 Difference]: With dead ends: 48 [2024-10-24 01:10:58,897 INFO L226 Difference]: Without dead ends: 46 [2024-10-24 01:10:58,897 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-10-24 01:10:58,900 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 01:10:58,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 01:10:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-10-24 01:10:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-10-24 01:10:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 01:10:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-10-24 01:10:58,920 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 16 [2024-10-24 01:10:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:10:58,920 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-10-24 01:10:58,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-24 01:10:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-10-24 01:10:58,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-24 01:10:58,922 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:10:58,922 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:10:58,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 01:10:58,922 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:10:58,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:10:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1956934271, now seen corresponding path program 1 times [2024-10-24 01:10:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:10:58,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824405764] [2024-10-24 01:10:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:10:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:10:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:10:58,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5967116] [2024-10-24 01:10:58,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:10:58,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:10:58,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:10:58,979 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:10:58,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 01:10:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:10:59,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-10-24 01:10:59,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:10:59,386 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 [2024-10-24 01:10:59,395 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 [2024-10-24 01:10:59,407 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 17 treesize of output 13 [2024-10-24 01:10:59,824 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 [2024-10-24 01:10:59,830 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 [2024-10-24 01:10:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 01:10:59,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:11:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 01:11:00,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:00,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824405764] [2024-10-24 01:11:00,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:00,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5967116] [2024-10-24 01:11:00,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5967116] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 01:11:00,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:11:00,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-10-24 01:11:00,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674824309] [2024-10-24 01:11:00,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:11:00,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 01:11:00,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:00,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 01:11:00,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-24 01:11:00,122 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-10-24 01:11:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:00,449 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-10-24 01:11:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 01:11:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 22 [2024-10-24 01:11:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:00,453 INFO L225 Difference]: With dead ends: 57 [2024-10-24 01:11:00,454 INFO L226 Difference]: Without dead ends: 55 [2024-10-24 01:11:00,456 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-10-24 01:11:00,459 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:00,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 01:11:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-24 01:11:00,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2024-10-24 01:11:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-10-24 01:11:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-10-24 01:11:00,478 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 22 [2024-10-24 01:11:00,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:00,478 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-10-24 01:11:00,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2024-10-24 01:11:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-10-24 01:11:00,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 01:11:00,481 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:00,481 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 01:11:00,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 01:11:00,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:00,686 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:00,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1106443508, now seen corresponding path program 1 times [2024-10-24 01:11:00,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:00,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023393333] [2024-10-24 01:11:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:00,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127656209] [2024-10-24 01:11:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:00,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:00,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:00,735 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:00,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 01:11:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:00,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-24 01:11:00,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:00,875 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 [2024-10-24 01:11:00,881 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 11 treesize of output 7 [2024-10-24 01:11:00,886 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 17 treesize of output 13 [2024-10-24 01:11:01,238 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 21 treesize of output 13 [2024-10-24 01:11:01,244 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 [2024-10-24 01:11:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 01:11:01,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:11:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 01:11:01,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023393333] [2024-10-24 01:11:01,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127656209] [2024-10-24 01:11:01,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127656209] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 01:11:01,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:11:01,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-10-24 01:11:01,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688822252] [2024-10-24 01:11:01,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:11:01,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 01:11:01,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:01,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 01:11:01,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-10-24 01:11:01,448 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 01:11:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:01,713 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2024-10-24 01:11:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 01:11:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-10-24 01:11:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:01,716 INFO L225 Difference]: With dead ends: 70 [2024-10-24 01:11:01,716 INFO L226 Difference]: Without dead ends: 68 [2024-10-24 01:11:01,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-24 01:11:01,717 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:01,717 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 244 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 01:11:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-24 01:11:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-10-24 01:11:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 47 states have internal predecessors, (49), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-10-24 01:11:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-10-24 01:11:01,738 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 34 [2024-10-24 01:11:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:01,738 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-10-24 01:11:01,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-24 01:11:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-10-24 01:11:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-10-24 01:11:01,740 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:01,740 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2024-10-24 01:11:01,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 01:11:01,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-24 01:11:01,942 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:01,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:01,943 INFO L85 PathProgramCache]: Analyzing trace with hash -60903716, now seen corresponding path program 1 times [2024-10-24 01:11:01,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:01,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564709821] [2024-10-24 01:11:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:01,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:02,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952719541] [2024-10-24 01:11:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:02,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:02,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:02,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:02,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 01:11:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:02,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-10-24 01:11:02,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:02,161 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 [2024-10-24 01:11:02,166 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 [2024-10-24 01:11:02,172 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 13 [2024-10-24 01:11:02,177 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 [2024-10-24 01:11:02,185 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 17 treesize of output 13 [2024-10-24 01:11:02,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 01:11:02,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 01:11:02,655 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 42 treesize of output 34 [2024-10-24 01:11:02,994 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 28 treesize of output 16 [2024-10-24 01:11:02,998 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 [2024-10-24 01:11:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-24 01:11:03,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:11:03,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:03,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564709821] [2024-10-24 01:11:03,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:03,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952719541] [2024-10-24 01:11:03,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952719541] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:11:03,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:11:03,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-10-24 01:11:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926196368] [2024-10-24 01:11:03,864 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:11:03,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 01:11:03,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:03,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 01:11:03,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-10-24 01:11:03,866 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 01:11:07,903 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] [2024-10-24 01:11:12,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:11:17,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:11:21,192 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] [2024-10-24 01:11:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:21,258 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2024-10-24 01:11:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 01:11:21,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-10-24 01:11:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:21,260 INFO L225 Difference]: With dead ends: 111 [2024-10-24 01:11:21,261 INFO L226 Difference]: Without dead ends: 109 [2024-10-24 01:11:21,261 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2024-10-24 01:11:21,262 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 33 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:21,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 151 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 454 Invalid, 4 Unknown, 0 Unchecked, 16.7s Time] [2024-10-24 01:11:21,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-24 01:11:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2024-10-24 01:11:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 70 states have internal predecessors, (75), 21 states have call successors, (21), 13 states have call predecessors, (21), 15 states have return successors, (26), 20 states have call predecessors, (26), 18 states have call successors, (26) [2024-10-24 01:11:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2024-10-24 01:11:21,295 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 40 [2024-10-24 01:11:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:21,295 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2024-10-24 01:11:21,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-24 01:11:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2024-10-24 01:11:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-24 01:11:21,297 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:21,298 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-10-24 01:11:21,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 01:11:21,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:21,499 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:21,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash -556833084, now seen corresponding path program 1 times [2024-10-24 01:11:21,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:21,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919573656] [2024-10-24 01:11:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:21,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:21,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [69007147] [2024-10-24 01:11:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:21,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:21,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:21,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:21,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 01:11:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:21,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-10-24 01:11:21,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:21,706 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 [2024-10-24 01:11:21,713 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 17 treesize of output 13 [2024-10-24 01:11:21,719 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 [2024-10-24 01:11:21,727 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 13 [2024-10-24 01:11:21,733 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 [2024-10-24 01:11:22,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 01:11:22,242 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 [2024-10-24 01:11:22,246 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 [2024-10-24 01:11:22,254 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 22 treesize of output 10 [2024-10-24 01:11:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 01:11:22,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:11:26,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919573656] [2024-10-24 01:11:26,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69007147] [2024-10-24 01:11:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69007147] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:11:26,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:11:26,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-10-24 01:11:26,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017102553] [2024-10-24 01:11:26,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:11:26,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 01:11:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 01:11:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=125, Unknown=1, NotChecked=0, Total=156 [2024-10-24 01:11:26,587 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 01:11:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:27,169 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2024-10-24 01:11:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 01:11:27,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 50 [2024-10-24 01:11:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:27,171 INFO L225 Difference]: With dead ends: 113 [2024-10-24 01:11:27,172 INFO L226 Difference]: Without dead ends: 109 [2024-10-24 01:11:27,172 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=67, Invalid=238, Unknown=1, NotChecked=0, Total=306 [2024-10-24 01:11:27,173 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:27,173 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 89 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 01:11:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-10-24 01:11:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-10-24 01:11:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 72 states have internal predecessors, (77), 21 states have call successors, (21), 14 states have call predecessors, (21), 16 states have return successors, (27), 20 states have call predecessors, (27), 18 states have call successors, (27) [2024-10-24 01:11:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2024-10-24 01:11:27,209 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 50 [2024-10-24 01:11:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:27,209 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2024-10-24 01:11:27,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2024-10-24 01:11:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2024-10-24 01:11:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-24 01:11:27,211 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:27,211 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] [2024-10-24 01:11:27,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 01:11:27,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:27,412 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:27,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1068410477, now seen corresponding path program 1 times [2024-10-24 01:11:27,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:27,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152476785] [2024-10-24 01:11:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:27,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:27,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-10-24 01:11:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:27,734 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-10-24 01:11:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:27,738 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-10-24 01:11:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:27,741 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 01:11:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:27,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-24 01:11:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:27,748 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-10-24 01:11:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-10-24 01:11:27,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:27,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152476785] [2024-10-24 01:11:27,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152476785] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 01:11:27,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 01:11:27,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-24 01:11:27,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513597989] [2024-10-24 01:11:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 01:11:27,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 01:11:27,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 01:11:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-10-24 01:11:27,755 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 01:11:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 01:11:27,976 INFO L93 Difference]: Finished difference Result 155 states and 182 transitions. [2024-10-24 01:11:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 01:11:27,978 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2024-10-24 01:11:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 01:11:27,979 INFO L225 Difference]: With dead ends: 155 [2024-10-24 01:11:27,979 INFO L226 Difference]: Without dead ends: 107 [2024-10-24 01:11:27,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-24 01:11:27,980 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 01:11:27,981 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 98 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 01:11:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-10-24 01:11:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-10-24 01:11:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 71 states have internal predecessors, (75), 21 states have call successors, (21), 14 states have call predecessors, (21), 15 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) [2024-10-24 01:11:28,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-10-24 01:11:28,002 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 51 [2024-10-24 01:11:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 01:11:28,002 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-10-24 01:11:28,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-24 01:11:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-10-24 01:11:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-10-24 01:11:28,004 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 01:11:28,004 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2024-10-24 01:11:28,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 01:11:28,004 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 01:11:28,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 01:11:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1602970988, now seen corresponding path program 1 times [2024-10-24 01:11:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 01:11:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336288433] [2024-10-24 01:11:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 01:11:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 01:11:28,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083202042] [2024-10-24 01:11:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 01:11:28,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 01:11:28,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 01:11:28,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 01:11:28,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 01:11:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 01:11:28,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 141 conjuncts are in the unsatisfiable core [2024-10-24 01:11:28,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 01:11:28,243 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 [2024-10-24 01:11:28,245 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 [2024-10-24 01:11:28,248 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 17 treesize of output 13 [2024-10-24 01:11:28,254 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 [2024-10-24 01:11:28,261 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 17 treesize of output 13 [2024-10-24 01:11:28,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-24 01:11:32,480 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#r~0#1.offset_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_int#4| |v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_main_~#r~0#1.offset_BEFORE_CALL_9|) (mod (select (select |c_#memory_int#3| |v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_7|) 4294967296))) is different from true [2024-10-24 01:11:33,040 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 [2024-10-24 01:11:37,496 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_31_to_38_0_~r.base_BEFORE_CALL_11 Int) (|v_func_to_recursive_line_31_to_38_0_#in~A.offset_BEFORE_CALL_7| Int) (v_func_to_recursive_line_31_to_38_0_~r.offset_BEFORE_CALL_11 Int) (|v_func_to_recursive_line_31_to_38_0_#in~A.base_BEFORE_CALL_7| Int)) (<= (mod (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_38_0_#in~A.base_BEFORE_CALL_7|) |v_func_to_recursive_line_31_to_38_0_#in~A.offset_BEFORE_CALL_7|) 4294967296) (select (select |c_#memory_int#4| v_func_to_recursive_line_31_to_38_0_~r.base_BEFORE_CALL_11) v_func_to_recursive_line_31_to_38_0_~r.offset_BEFORE_CALL_11))) (exists ((|v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#r~0#1.offset_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_int#4| |v_ULTIMATE.start_main_~#r~0#1.base_BEFORE_CALL_9|) |v_ULTIMATE.start_main_~#r~0#1.offset_BEFORE_CALL_9|) (mod (select (select |c_#memory_int#3| |v_ULTIMATE.start_main_~#A~0#1.base_BEFORE_CALL_7|) |v_ULTIMATE.start_main_~#A~0#1.offset_BEFORE_CALL_7|) 4294967296)))) is different from true [2024-10-24 01:11:37,918 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 42 treesize of output 26 [2024-10-24 01:11:37,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 01:11:37,943 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 40 treesize of output 40 [2024-10-24 01:11:37,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 01:11:37,984 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 79 treesize of output 87 [2024-10-24 01:11:38,030 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 [2024-10-24 01:11:38,436 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 38 treesize of output 26 [2024-10-24 01:11:38,442 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 30 treesize of output 18 [2024-10-24 01:11:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 29 trivial. 64 not checked. [2024-10-24 01:11:38,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 01:11:43,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 01:11:43,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336288433] [2024-10-24 01:11:43,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 01:11:43,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083202042] [2024-10-24 01:11:43,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083202042] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 01:11:43,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-10-24 01:11:43,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-10-24 01:11:43,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622381840] [2024-10-24 01:11:43,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-10-24 01:11:43,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 01:11:43,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 01:11:43,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 01:11:43,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=682, Unknown=2, NotChecked=106, Total=870 [2024-10-24 01:11:43,769 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 25 states, 20 states have (on average 1.75) internal successors, (35), 21 states have internal predecessors, (35), 10 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2024-10-24 01:11:49,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-10-24 01:11:51,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:11:56,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:00,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:04,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:08,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:12,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:16,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:19,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-10-24 01:12:23,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]