./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.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 d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-11 21:05:01,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-11 21:05:02,041 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-11 21:05:02,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-11 21:05:02,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-11 21:05:02,086 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-11 21:05:02,086 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-11 21:05:02,087 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-11 21:05:02,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-11 21:05:02,088 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-11 21:05:02,088 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-11 21:05:02,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-11 21:05:02,089 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-11 21:05:02,090 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-11 21:05:02,090 INFO L153 SettingsManager]: * Use SBE=true [2024-11-11 21:05:02,090 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-11 21:05:02,091 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-11 21:05:02,091 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-11 21:05:02,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-11 21:05:02,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-11 21:05:02,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-11 21:05:02,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-11 21:05:02,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-11 21:05:02,094 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-11 21:05:02,094 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-11 21:05:02,094 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-11 21:05:02,095 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-11 21:05:02,095 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-11 21:05:02,095 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-11 21:05:02,096 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-11 21:05:02,096 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-11 21:05:02,096 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-11 21:05:02,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:05:02,097 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-11 21:05:02,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-11 21:05:02,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-11 21:05:02,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-11 21:05:02,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-11 21:05:02,098 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-11 21:05:02,099 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-11 21:05:02,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-11 21:05:02,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-11 21:05:02,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d93bd48e791c000b7768d0e055259ea6d087a487fbdd17b18765993d4c240b84 [2024-11-11 21:05:02,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-11 21:05:02,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-11 21:05:02,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-11 21:05:02,393 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-11 21:05:02,393 INFO L274 PluginConnector]: CDTParser initialized [2024-11-11 21:05:02,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2024-11-11 21:05:03,860 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-11 21:05:04,034 INFO L384 CDTParser]: Found 1 translation units. [2024-11-11 21:05:04,035 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_nla-digbench/recursified_lcm2.c [2024-11-11 21:05:04,047 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97fd4fe5/7caf56e3304f4bf399efb1056c8675d7/FLAG2253ee695 [2024-11-11 21:05:04,062 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97fd4fe5/7caf56e3304f4bf399efb1056c8675d7 [2024-11-11 21:05:04,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-11 21:05:04,068 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-11 21:05:04,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-11 21:05:04,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-11 21:05:04,076 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-11 21:05:04,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebaa356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04, skipping insertion in model container [2024-11-11 21:05:04,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,103 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-11 21:05:04,288 WARN L250 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_lcm2.c[1061,1074] [2024-11-11 21:05:04,313 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:05:04,325 INFO L200 MainTranslator]: Completed pre-run [2024-11-11 21:05:04,339 WARN L250 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_lcm2.c[1061,1074] [2024-11-11 21:05:04,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-11 21:05:04,378 INFO L204 MainTranslator]: Completed translation [2024-11-11 21:05:04,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04 WrapperNode [2024-11-11 21:05:04,378 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-11 21:05:04,380 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-11 21:05:04,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-11 21:05:04,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-11 21:05:04,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,396 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,418 INFO L138 Inliner]: procedures = 16, calls = 82, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 92 [2024-11-11 21:05:04,420 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-11 21:05:04,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-11 21:05:04,421 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-11 21:05:04,421 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-11 21:05:04,433 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,433 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,436 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,461 INFO L175 MemorySlicer]: Split 51 memory accesses to 8 slices as follows [2, 7, 8, 8, 6, 6, 7, 7]. 16 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 0, 2, 2, 2, 2, 1, 1]. [2024-11-11 21:05:04,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,480 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,481 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-11 21:05:04,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-11 21:05:04,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-11 21:05:04,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-11 21:05:04,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (1/1) ... [2024-11-11 21:05:04,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-11 21:05:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:05:04,514 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) [2024-11-11 21:05:04,517 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 [2024-11-11 21:05:04,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-11 21:05:04,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-11 21:05:04,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-11 21:05:04,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-11 21:05:04,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-11 21:05:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-11 21:05:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-11 21:05:04,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-11 21:05:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-11 21:05:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-11 21:05:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-11 21:05:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-11 21:05:04,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-11 21:05:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-11 21:05:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-11 21:05:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-11 21:05:04,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-11 21:05:04,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-11 21:05:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-11 21:05:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_35_to_46_0 [2024-11-11 21:05:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_35_to_46_0 [2024-11-11 21:05:04,677 INFO L238 CfgBuilder]: Building ICFG [2024-11-11 21:05:04,680 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-11 21:05:04,951 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-11 21:05:04,952 INFO L287 CfgBuilder]: Performing block encoding [2024-11-11 21:05:04,968 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-11 21:05:04,969 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-11 21:05:04,969 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:05:04 BoogieIcfgContainer [2024-11-11 21:05:04,969 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-11 21:05:04,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-11 21:05:04,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-11 21:05:04,994 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-11 21:05:04,998 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:05:04" (1/3) ... [2024-11-11 21:05:04,999 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117c0923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:05:04, skipping insertion in model container [2024-11-11 21:05:05,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:05:04" (2/3) ... [2024-11-11 21:05:05,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117c0923 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:05:05, skipping insertion in model container [2024-11-11 21:05:05,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:05:04" (3/3) ... [2024-11-11 21:05:05,010 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_lcm2.c [2024-11-11 21:05:05,026 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-11 21:05:05,026 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-11 21:05:05,093 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-11 21:05:05,100 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;@d929a9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-11 21:05:05,101 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-11 21:05:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-11 21:05:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 21:05:05,114 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:05:05,114 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:05:05,115 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:05:05,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:05:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash -680392680, now seen corresponding path program 1 times [2024-11-11 21:05:05,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:05:05,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857226048] [2024-11-11 21:05:05,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:05:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:05:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:05,367 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-11 21:05:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:05,375 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-11 21:05:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:05,381 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-11-11 21:05:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:05,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-11 21:05:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 21:05:05,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:05:05,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857226048] [2024-11-11 21:05:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857226048] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:05:05,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:05:05,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-11 21:05:05,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729596968] [2024-11-11 21:05:05,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:05:05,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-11 21:05:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:05:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-11 21:05:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 21:05:05,431 INFO L87 Difference]: Start difference. First operand has 36 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 21:05:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:05:05,450 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2024-11-11 21:05:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-11 21:05:05,452 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-11 21:05:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:05:05,457 INFO L225 Difference]: With dead ends: 69 [2024-11-11 21:05:05,457 INFO L226 Difference]: Without dead ends: 32 [2024-11-11 21:05:05,460 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-11 21:05:05,463 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-11 21:05:05,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-11 21:05:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-11 21:05:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-11 21:05:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-11 21:05:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-11 21:05:05,495 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 33 [2024-11-11 21:05:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:05:05,495 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-11 21:05:05,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-11 21:05:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-11 21:05:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-11 21:05:05,497 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:05:05,497 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:05:05,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-11 21:05:05,498 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:05:05,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:05:05,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1986910944, now seen corresponding path program 1 times [2024-11-11 21:05:05,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:05:05,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67108558] [2024-11-11 21:05:05,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:05:05,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:05:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:05:05,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509858731] [2024-11-11 21:05:05,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:05:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:05:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:05:05,647 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) [2024-11-11 21:05:05,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-11 21:05:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:05,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-11 21:05:05,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:05:05,959 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 [2024-11-11 21:05:05,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-11 21:05:05,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:06,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:06,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:06,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:06,201 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 [2024-11-11 21:05:06,211 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 26 treesize of output 14 [2024-11-11 21:05:06,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-11 21:05:06,231 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 [2024-11-11 21:05:06,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-11 21:05:06,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-11 21:05:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 21:05:06,305 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-11 21:05:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:05:06,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67108558] [2024-11-11 21:05:06,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:05:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509858731] [2024-11-11 21:05:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509858731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-11 21:05:06,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-11 21:05:06,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-11 21:05:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530004545] [2024-11-11 21:05:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-11 21:05:06,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-11 21:05:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:05:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-11 21:05:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-11 21:05:06,310 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 21:05:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:05:06,581 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-11-11 21:05:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-11 21:05:06,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-11 21:05:06,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:05:06,583 INFO L225 Difference]: With dead ends: 47 [2024-11-11 21:05:06,583 INFO L226 Difference]: Without dead ends: 45 [2024-11-11 21:05:06,584 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-11 21:05:06,607 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-11 21:05:06,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 168 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-11 21:05:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-11 21:05:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-11-11 21:05:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-11 21:05:06,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-11-11 21:05:06,639 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 33 [2024-11-11 21:05:06,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:05:06,639 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-11-11 21:05:06,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-11 21:05:06,640 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-11-11 21:05:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-11 21:05:06,641 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:05:06,641 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-11-11 21:05:06,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-11 21:05:06,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:05:06,842 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:05:06,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:05:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2056489384, now seen corresponding path program 1 times [2024-11-11 21:05:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:05:06,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544569538] [2024-11-11 21:05:06,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:05:06,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:05:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:05:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690827279] [2024-11-11 21:05:06,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:05:06,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:05:06,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:05:06,907 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) [2024-11-11 21:05:06,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-11 21:05:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:07,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-11 21:05:07,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:05:07,213 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 [2024-11-11 21:05:07,215 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 [2024-11-11 21:05:07,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:07,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:07,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:07,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:07,270 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 [2024-11-11 21:05:07,276 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 [2024-11-11 21:05:07,287 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 [2024-11-11 21:05:07,291 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 [2024-11-11 21:05:07,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 21:05:07,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-11 21:05:07,797 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 [2024-11-11 21:05:07,805 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 [2024-11-11 21:05:07,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-11 21:05:07,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-11 21:05:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 21:05:07,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:05:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 21:05:10,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:05:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544569538] [2024-11-11 21:05:10,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:05:10,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690827279] [2024-11-11 21:05:10,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690827279] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:05:10,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:05:10,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-11-11 21:05:10,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316411705] [2024-11-11 21:05:10,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:05:10,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-11 21:05:10,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:05:10,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-11 21:05:10,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-11-11 21:05:10,131 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 21:05:13,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-11 21:05:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:05:13,934 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-11-11 21:05:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-11 21:05:13,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 43 [2024-11-11 21:05:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:05:13,939 INFO L225 Difference]: With dead ends: 57 [2024-11-11 21:05:13,939 INFO L226 Difference]: Without dead ends: 45 [2024-11-11 21:05:13,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-11-11 21:05:13,941 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-11 21:05:13,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 128 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-11 21:05:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-11 21:05:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-11 21:05:13,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-11-11 21:05:13,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2024-11-11 21:05:13,951 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 43 [2024-11-11 21:05:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:05:13,952 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2024-11-11 21:05:13,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-11 21:05:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2024-11-11 21:05:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-11 21:05:13,953 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:05:13,953 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:05:13,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-11 21:05:14,154 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,SelfDestructingSolverStorable2 [2024-11-11 21:05:14,154 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:05:14,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:05:14,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1587000741, now seen corresponding path program 1 times [2024-11-11 21:05:14,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:05:14,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980420137] [2024-11-11 21:05:14,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:05:14,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:05:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:05:14,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125326181] [2024-11-11 21:05:14,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:05:14,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:05:14,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:05:14,242 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) [2024-11-11 21:05:14,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-11 21:05:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:05:15,762 WARN L254 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-11-11 21:05:15,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:05:15,772 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 [2024-11-11 21:05:15,774 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 [2024-11-11 21:05:15,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:15,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:15,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:15,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:05:19,964 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_1 Int)) (let ((.cse0 (select (select |c_#memory_int#7| v_func_to_recursive_line_35_to_46_0_~a.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~a.offset_BEFORE_CALL_1))) (and (= .cse0 (select (select |c_#memory_int#2| v_func_to_recursive_line_35_to_46_0_~x.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~x.offset_BEFORE_CALL_1)) (= .cse0 (select (select |c_#memory_int#4| v_func_to_recursive_line_35_to_46_0_~v.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~v.offset_BEFORE_CALL_1))))) (exists ((v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_1 Int) (v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_1 Int)) (let ((.cse1 (select (select |c_#memory_int#6| v_func_to_recursive_line_35_to_46_0_~b.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~b.offset_BEFORE_CALL_1))) (and (= (select (select |c_#memory_int#5| v_func_to_recursive_line_35_to_46_0_~u.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~u.offset_BEFORE_CALL_1) .cse1) (= (select (select |c_#memory_int#3| v_func_to_recursive_line_35_to_46_0_~y.base_BEFORE_CALL_1) v_func_to_recursive_line_35_to_46_0_~y.offset_BEFORE_CALL_1) .cse1))))) is different from true [2024-11-11 21:05:20,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-11-11 21:05:20,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-11-11 21:05:20,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2024-11-11 21:05:20,308 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 43 treesize of output 31 [2024-11-11 21:05:20,315 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 50 treesize of output 34 [2024-11-11 21:05:20,321 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 57 treesize of output 37 [2024-11-11 21:05:20,326 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 50 treesize of output 30 [2024-11-11 21:05:20,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-11 21:05:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 1 not checked. [2024-11-11 21:05:24,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:05:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-11 21:05:31,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:05:31,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980420137] [2024-11-11 21:05:31,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:05:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125326181] [2024-11-11 21:05:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125326181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-11 21:05:31,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-11 21:05:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2024-11-11 21:05:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512856333] [2024-11-11 21:05:31,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-11 21:05:31,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-11 21:05:31,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:05:31,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-11 21:05:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=289, Unknown=2, NotChecked=34, Total=380 [2024-11-11 21:05:31,027 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 20 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-11 21:05:41,836 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] [2024-11-11 21:05:45,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 21:05:57,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 21:06:01,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 21:06:07,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-11 21:06:07,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:06:07,269 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2024-11-11 21:06:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-11 21:06:07,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2024-11-11 21:06:07,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:06:07,271 INFO L225 Difference]: With dead ends: 63 [2024-11-11 21:06:07,271 INFO L226 Difference]: Without dead ends: 55 [2024-11-11 21:06:07,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=129, Invalid=626, Unknown=5, NotChecked=52, Total=812 [2024-11-11 21:06:07,272 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 16 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2024-11-11 21:06:07,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 220 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 242 Invalid, 5 Unknown, 70 Unchecked, 22.6s Time] [2024-11-11 21:06:07,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-11 21:06:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-11-11 21:06:07,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-11-11 21:06:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2024-11-11 21:06:07,287 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 44 [2024-11-11 21:06:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:06:07,287 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2024-11-11 21:06:07,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 8 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-11 21:06:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2024-11-11 21:06:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-11 21:06:07,289 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:06:07,289 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:06:07,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-11 21:06:07,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:06:07,490 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:06:07,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:06:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2057323032, now seen corresponding path program 1 times [2024-11-11 21:06:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:06:07,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519781073] [2024-11-11 21:06:07,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:06:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:06:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:06:07,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294112010] [2024-11-11 21:06:07,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:06:07,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:06:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:06:07,684 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) [2024-11-11 21:06:07,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-11 21:06:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:06:08,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 230 conjuncts are in the unsatisfiable core [2024-11-11 21:06:08,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:06:08,408 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 [2024-11-11 21:06:08,413 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 [2024-11-11 21:06:08,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:08,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:08,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:08,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:08,462 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 [2024-11-11 21:06:08,466 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 [2024-11-11 21:06:08,470 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 [2024-11-11 21:06:08,473 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 [2024-11-11 21:06:10,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2024-11-11 21:06:10,191 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 [2024-11-11 21:06:10,927 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 49 treesize of output 41 [2024-11-11 21:06:10,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2024-11-11 21:06:10,944 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 71 treesize of output 55 [2024-11-11 21:06:10,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2024-11-11 21:06:10,959 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 47 treesize of output 31 [2024-11-11 21:06:10,965 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 40 treesize of output 28 [2024-11-11 21:06:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-11 21:06:11,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-11 21:06:15,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-11 21:06:15,918 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 113 treesize of output 116 [2024-11-11 21:06:31,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-11 21:06:31,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519781073] [2024-11-11 21:06:31,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-11 21:06:31,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294112010] [2024-11-11 21:06:31,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294112010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-11 21:06:31,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-11 21:06:31,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-11-11 21:06:31,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690595067] [2024-11-11 21:06:31,112 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-11 21:06:31,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-11 21:06:31,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-11 21:06:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-11 21:06:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=403, Unknown=1, NotChecked=0, Total=462 [2024-11-11 21:06:31,113 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-11 21:06:36,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-11 21:06:37,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-11 21:06:40,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-11 21:06:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-11 21:06:40,667 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-11-11 21:06:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-11 21:06:40,668 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 69 [2024-11-11 21:06:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-11 21:06:40,669 INFO L225 Difference]: With dead ends: 72 [2024-11-11 21:06:40,669 INFO L226 Difference]: Without dead ends: 66 [2024-11-11 21:06:40,670 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=129, Invalid=800, Unknown=1, NotChecked=0, Total=930 [2024-11-11 21:06:40,671 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-11 21:06:40,671 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 174 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2024-11-11 21:06:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-11 21:06:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-11-11 21:06:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2024-11-11 21:06:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2024-11-11 21:06:40,689 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 69 [2024-11-11 21:06:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-11 21:06:40,689 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2024-11-11 21:06:40,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-11 21:06:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2024-11-11 21:06:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-11 21:06:40,691 INFO L210 NwaCegarLoop]: Found error trace [2024-11-11 21:06:40,691 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-11 21:06:40,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-11 21:06:40,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:06:40,892 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-11 21:06:40,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-11 21:06:40,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2018789546, now seen corresponding path program 1 times [2024-11-11 21:06:40,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-11 21:06:40,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845045501] [2024-11-11 21:06:40,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:06:40,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-11 21:06:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-11 21:06:40,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171693962] [2024-11-11 21:06:40,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-11 21:06:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-11 21:06:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-11 21:06:41,000 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) [2024-11-11 21:06:41,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-11 21:06:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-11 21:06:41,726 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 246 conjuncts are in the unsatisfiable core [2024-11-11 21:06:41,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-11 21:06:41,741 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 [2024-11-11 21:06:41,742 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 [2024-11-11 21:06:41,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:41,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:41,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:41,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-11 21:06:41,786 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 [2024-11-11 21:06:41,789 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 [2024-11-11 21:06:41,800 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 [2024-11-11 21:06:41,803 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