./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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_loop-simple/recursified_nested_3.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 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:28:18,166 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:28:18,242 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:28:18,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:28:18,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:28:18,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:28:18,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:28:18,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:28:18,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:28:18,283 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:28:18,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:28:18,284 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:28:18,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:28:18,285 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:28:18,287 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:28:18,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:28:18,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:28:18,288 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:28:18,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:28:18,288 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:28:18,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:28:18,292 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:28:18,292 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:28:18,293 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:28:18,293 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:28:18,293 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:28:18,293 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:28:18,294 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:28:18,294 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:28:18,294 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:28:18,294 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:28:18,295 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:28:18,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:28:18,295 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:28:18,295 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:28:18,296 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:28:18,296 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:28:18,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:28:18,296 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:28:18,296 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:28:18,297 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:28:18,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:28:18,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a8e2b8a66923dd7d46d9db92fbd8b38c75eb8108da5237ec87b15cd1ae67985 [2024-11-18 14:28:18,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:28:18,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:28:18,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:28:18,607 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:28:18,607 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:28:18,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2024-11-18 14:28:19,963 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:28:20,153 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:28:20,155 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_3.c [2024-11-18 14:28:20,170 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8ea902d/e4e9beb214964b66a5a54a664dfa98cb/FLAGfdb356fbd [2024-11-18 14:28:20,185 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff8ea902d/e4e9beb214964b66a5a54a664dfa98cb [2024-11-18 14:28:20,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:28:20,190 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:28:20,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:28:20,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:28:20,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:28:20,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61229bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20, skipping insertion in model container [2024-11-18 14:28:20,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,219 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:28:20,399 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_loop-simple/recursified_nested_3.c[1963,1976] [2024-11-18 14:28:20,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:28:20,445 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:28:20,461 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_loop-simple/recursified_nested_3.c[1963,1976] [2024-11-18 14:28:20,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:28:20,487 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:28:20,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20 WrapperNode [2024-11-18 14:28:20,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:28:20,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:28:20,489 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:28:20,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:28:20,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,518 INFO L138 Inliner]: procedures = 14, calls = 40, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2024-11-18 14:28:20,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:28:20,519 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:28:20,519 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:28:20,519 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:28:20,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,528 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,542 INFO L175 MemorySlicer]: Split 20 memory accesses to 4 slices as follows [2, 6, 6, 6]. 30 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [2, 1, 1, 1]. The 6 writes are split as follows [0, 2, 2, 2]. [2024-11-18 14:28:20,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:28:20,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:28:20,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:28:20,556 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:28:20,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (1/1) ... [2024-11-18 14:28:20,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:28:20,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:20,596 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) [2024-11-18 14:28:20,599 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 [2024-11-18 14:28:20,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:28:20,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:28:20,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 14:28:20,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 14:28:20,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-18 14:28:20,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 14:28:20,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 14:28:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 14:28:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 14:28:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-18 14:28:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_23_to_23_0 [2024-11-18 14:28:20,646 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_23_to_23_0 [2024-11-18 14:28:20,646 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_22_to_23_0 [2024-11-18 14:28:20,646 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_22_to_23_0 [2024-11-18 14:28:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:28:20,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:28:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 14:28:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 14:28:20,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 14:28:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-18 14:28:20,648 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_21_to_22_0 [2024-11-18 14:28:20,649 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_21_to_22_0 [2024-11-18 14:28:20,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 14:28:20,787 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:28:20,794 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:28:20,992 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-18 14:28:20,993 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:28:21,004 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:28:21,006 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-18 14:28:21,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:28:21 BoogieIcfgContainer [2024-11-18 14:28:21,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:28:21,008 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:28:21,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:28:21,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:28:21,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:28:20" (1/3) ... [2024-11-18 14:28:21,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a6f9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:28:21, skipping insertion in model container [2024-11-18 14:28:21,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:20" (2/3) ... [2024-11-18 14:28:21,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69a6f9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:28:21, skipping insertion in model container [2024-11-18 14:28:21,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:28:21" (3/3) ... [2024-11-18 14:28:21,016 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_3.c [2024-11-18 14:28:21,031 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:28:21,032 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:28:21,088 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:28:21,094 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;@4efdda77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:28:21,094 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:28:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-18 14:28:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-18 14:28:21,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:21,103 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:21,103 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:21,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash 58732503, now seen corresponding path program 1 times [2024-11-18 14:28:21,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:21,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744111244] [2024-11-18 14:28:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:21,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:28:21,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:21,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744111244] [2024-11-18 14:28:21,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744111244] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:21,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:21,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:21,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123822134] [2024-11-18 14:28:21,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:21,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:21,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:21,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:21,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:21,660 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:28:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:21,819 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-11-18 14:28:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:21,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-18 14:28:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:21,830 INFO L225 Difference]: With dead ends: 46 [2024-11-18 14:28:21,831 INFO L226 Difference]: Without dead ends: 31 [2024-11-18 14:28:21,833 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:21,837 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:21,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-18 14:28:21,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-18 14:28:21,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.25) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-18 14:28:21,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-11-18 14:28:21,872 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2024-11-18 14:28:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:21,872 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-11-18 14:28:21,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-18 14:28:21,873 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-11-18 14:28:21,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-18 14:28:21,874 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:21,874 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:21,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:28:21,875 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:21,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:21,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1518425104, now seen corresponding path program 1 times [2024-11-18 14:28:21,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:21,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570003897] [2024-11-18 14:28:21,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:21,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:28:22,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:22,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570003897] [2024-11-18 14:28:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570003897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:22,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:22,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963932516] [2024-11-18 14:28:22,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:22,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:22,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:22,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:22,201 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:28:22,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:22,317 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-11-18 14:28:22,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:22,319 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-11-18 14:28:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:22,320 INFO L225 Difference]: With dead ends: 61 [2024-11-18 14:28:22,320 INFO L226 Difference]: Without dead ends: 33 [2024-11-18 14:28:22,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:22,323 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:22,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-18 14:28:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-18 14:28:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-11-18 14:28:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-18 14:28:22,338 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 24 [2024-11-18 14:28:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:22,338 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-18 14:28:22,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:28:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-18 14:28:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-18 14:28:22,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:22,341 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:22,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:28:22,341 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:22,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:22,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1549340056, now seen corresponding path program 1 times [2024-11-18 14:28:22,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889392444] [2024-11-18 14:28:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:22,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-18 14:28:22,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:22,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889392444] [2024-11-18 14:28:22,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889392444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:22,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:22,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-18 14:28:22,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638706888] [2024-11-18 14:28:22,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:22,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-18 14:28:22,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-18 14:28:22,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:22,566 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:28:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:22,631 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2024-11-18 14:28:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2024-11-18 14:28:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:22,632 INFO L225 Difference]: With dead ends: 65 [2024-11-18 14:28:22,633 INFO L226 Difference]: Without dead ends: 35 [2024-11-18 14:28:22,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:22,635 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:22,635 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-18 14:28:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-18 14:28:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-18 14:28:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-18 14:28:22,642 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 35 [2024-11-18 14:28:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:22,642 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-18 14:28:22,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 1 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-18 14:28:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-18 14:28:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-18 14:28:22,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:22,644 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:22,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-18 14:28:22,644 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:22,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1995545220, now seen corresponding path program 1 times [2024-11-18 14:28:22,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:22,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610767310] [2024-11-18 14:28:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:22,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-18 14:28:23,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:23,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610767310] [2024-11-18 14:28:23,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610767310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045056391] [2024-11-18 14:28:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:23,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:23,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:23,032 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) [2024-11-18 14:28:23,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-18 14:28:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:23,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 14:28:23,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:23,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:28:23,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-18 14:28:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-18 14:28:23,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:23,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-18 14:28:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-18 14:28:23,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045056391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:23,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:23,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2024-11-18 14:28:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798399590] [2024-11-18 14:28:23,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:23,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:28:23,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:28:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:28:23,860 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-18 14:28:24,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:24,406 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2024-11-18 14:28:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-18 14:28:24,407 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) Word has length 40 [2024-11-18 14:28:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:24,408 INFO L225 Difference]: With dead ends: 80 [2024-11-18 14:28:24,408 INFO L226 Difference]: Without dead ends: 46 [2024-11-18 14:28:24,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2024-11-18 14:28:24,413 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 38 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:24,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:28:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-18 14:28:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-11-18 14:28:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-18 14:28:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-18 14:28:24,433 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 40 [2024-11-18 14:28:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:24,433 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-18 14:28:24,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 3.0) internal successors, (51), 18 states have internal predecessors, (51), 10 states have call successors, (15), 5 states have call predecessors, (15), 8 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-18 14:28:24,434 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-18 14:28:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-18 14:28:24,435 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:24,435 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:24,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-18 14:28:24,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:24,640 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:24,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1008547690, now seen corresponding path program 1 times [2024-11-18 14:28:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309225248] [2024-11-18 14:28:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:24,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-18 14:28:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:24,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309225248] [2024-11-18 14:28:24,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309225248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:24,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:24,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-18 14:28:24,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209297854] [2024-11-18 14:28:24,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:24,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 14:28:24,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 14:28:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 14:28:24,706 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-18 14:28:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:24,726 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-18 14:28:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 14:28:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 45 [2024-11-18 14:28:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:24,727 INFO L225 Difference]: With dead ends: 49 [2024-11-18 14:28:24,727 INFO L226 Difference]: Without dead ends: 46 [2024-11-18 14:28:24,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-18 14:28:24,728 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:24,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 93 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-18 14:28:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-11-18 14:28:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 6 states have call successors, (6), 4 states have call predecessors, (6), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-18 14:28:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-18 14:28:24,742 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 45 [2024-11-18 14:28:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:24,742 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-18 14:28:24,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-18 14:28:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-18 14:28:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-18 14:28:24,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:24,744 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:24,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-18 14:28:24,744 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:24,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:24,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1008545768, now seen corresponding path program 1 times [2024-11-18 14:28:24,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:24,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120606083] [2024-11-18 14:28:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-18 14:28:25,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120606083] [2024-11-18 14:28:25,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120606083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:25,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988032192] [2024-11-18 14:28:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:25,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:25,216 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) [2024-11-18 14:28:25,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-18 14:28:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:25,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-18 14:28:25,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:25,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:28:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-18 14:28:25,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-18 14:28:26,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988032192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:26,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:26,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 10] total 27 [2024-11-18 14:28:26,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243141092] [2024-11-18 14:28:26,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:26,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-18 14:28:26,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-18 14:28:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:28:26,021 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 27 states, 20 states have (on average 2.55) internal successors, (51), 23 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2024-11-18 14:28:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:26,463 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-11-18 14:28:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:28:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 20 states have (on average 2.55) internal successors, (51), 23 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) Word has length 45 [2024-11-18 14:28:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:26,465 INFO L225 Difference]: With dead ends: 85 [2024-11-18 14:28:26,465 INFO L226 Difference]: Without dead ends: 45 [2024-11-18 14:28:26,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2024-11-18 14:28:26,467 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:26,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 164 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:28:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-18 14:28:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-18 14:28:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-18 14:28:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2024-11-18 14:28:26,474 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 45 [2024-11-18 14:28:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:26,475 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2024-11-18 14:28:26,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 20 states have (on average 2.55) internal successors, (51), 23 states have internal predecessors, (51), 11 states have call successors, (16), 5 states have call predecessors, (16), 9 states have return successors, (16), 8 states have call predecessors, (16), 11 states have call successors, (16) [2024-11-18 14:28:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2024-11-18 14:28:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-18 14:28:26,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:26,477 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:26,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-18 14:28:26,678 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,SelfDestructingSolverStorable5 [2024-11-18 14:28:26,678 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:26,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1357665073, now seen corresponding path program 2 times [2024-11-18 14:28:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031913259] [2024-11-18 14:28:26,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:28:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:26,707 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:28:26,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 97 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-18 14:28:27,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031913259] [2024-11-18 14:28:27,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031913259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:27,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023396073] [2024-11-18 14:28:27,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:28:27,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:27,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:27,360 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) [2024-11-18 14:28:27,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-18 14:28:27,486 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:28:27,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:27,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-18 14:28:27,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:27,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:28:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-18 14:28:27,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 109 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-18 14:28:29,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023396073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:29,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 18] total 32 [2024-11-18 14:28:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060216104] [2024-11-18 14:28:29,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:29,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-18 14:28:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:29,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-18 14:28:29,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2024-11-18 14:28:29,194 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 32 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 27 states have internal predecessors, (64), 10 states have call successors, (21), 7 states have call predecessors, (21), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-18 14:28:29,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:29,493 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-11-18 14:28:29,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-18 14:28:29,493 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 27 states have internal predecessors, (64), 10 states have call successors, (21), 7 states have call predecessors, (21), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 87 [2024-11-18 14:28:29,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:29,494 INFO L225 Difference]: With dead ends: 89 [2024-11-18 14:28:29,494 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 14:28:29,495 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2024-11-18 14:28:29,496 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:29,496 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 332 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:28:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 14:28:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-18 14:28:29,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 33 states have internal predecessors, (36), 6 states have call successors, (6), 4 states have call predecessors, (6), 11 states have return successors, (14), 11 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-18 14:28:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2024-11-18 14:28:29,506 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 87 [2024-11-18 14:28:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:29,506 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2024-11-18 14:28:29,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 27 states have internal predecessors, (64), 10 states have call successors, (21), 7 states have call predecessors, (21), 11 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-18 14:28:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2024-11-18 14:28:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-18 14:28:29,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:29,510 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:29,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-18 14:28:29,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:29,716 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:29,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1630787441, now seen corresponding path program 3 times [2024-11-18 14:28:29,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:29,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682557571] [2024-11-18 14:28:29,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:28:29,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:29,740 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 14:28:29,740 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-18 14:28:30,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682557571] [2024-11-18 14:28:30,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682557571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:30,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549067565] [2024-11-18 14:28:30,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:28:30,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:30,122 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) [2024-11-18 14:28:30,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-18 14:28:30,254 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-18 14:28:30,255 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:30,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-18 14:28:30,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:30,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:28:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2024-11-18 14:28:30,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2024-11-18 14:28:31,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549067565] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:31,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:31,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 34 [2024-11-18 14:28:31,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58161556] [2024-11-18 14:28:31,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:31,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-18 14:28:31,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:31,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-18 14:28:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2024-11-18 14:28:31,557 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 34 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-11-18 14:28:32,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:32,372 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-11-18 14:28:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-18 14:28:32,373 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) Word has length 107 [2024-11-18 14:28:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:32,374 INFO L225 Difference]: With dead ends: 84 [2024-11-18 14:28:32,375 INFO L226 Difference]: Without dead ends: 75 [2024-11-18 14:28:32,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2024-11-18 14:28:32,380 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:32,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 274 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-18 14:28:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-18 14:28:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2024-11-18 14:28:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 43 states have internal predecessors, (49), 7 states have call successors, (7), 5 states have call predecessors, (7), 17 states have return successors, (28), 18 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-18 14:28:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2024-11-18 14:28:32,396 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 107 [2024-11-18 14:28:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:32,396 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2024-11-18 14:28:32,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 30 states have internal predecessors, (61), 16 states have call successors, (20), 6 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-11-18 14:28:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2024-11-18 14:28:32,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-18 14:28:32,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:32,402 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 15, 15, 15, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:32,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-18 14:28:32,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:32,603 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:32,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash -179007914, now seen corresponding path program 1 times [2024-11-18 14:28:32,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:32,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083361828] [2024-11-18 14:28:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:32,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2024-11-18 14:28:33,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:33,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083361828] [2024-11-18 14:28:33,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083361828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:33,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244941175] [2024-11-18 14:28:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:33,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:33,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:33,187 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) [2024-11-18 14:28:33,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-18 14:28:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:33,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 14:28:33,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:33,411 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 [2024-11-18 14:28:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 410 proven. 3 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-18 14:28:33,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-11-18 14:28:34,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244941175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:34,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:34,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2024-11-18 14:28:34,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167046450] [2024-11-18 14:28:34,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:34,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:28:34,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:34,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:28:34,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:28:34,336 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 22 states, 16 states have (on average 3.6875) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-18 14:28:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:34,528 INFO L93 Difference]: Finished difference Result 117 states and 149 transitions. [2024-11-18 14:28:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:28:34,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 3.6875) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) Word has length 154 [2024-11-18 14:28:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:34,531 INFO L225 Difference]: With dead ends: 117 [2024-11-18 14:28:34,531 INFO L226 Difference]: Without dead ends: 55 [2024-11-18 14:28:34,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2024-11-18 14:28:34,532 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:34,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 213 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:34,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-18 14:28:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-18 14:28:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 6 states have call successors, (6), 4 states have call predecessors, (6), 14 states have return successors, (17), 14 states have call predecessors, (17), 6 states have call successors, (17) [2024-11-18 14:28:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-11-18 14:28:34,543 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 154 [2024-11-18 14:28:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:34,544 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-11-18 14:28:34,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 3.6875) internal successors, (59), 19 states have internal predecessors, (59), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (22), 8 states have call predecessors, (22), 11 states have call successors, (22) [2024-11-18 14:28:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-11-18 14:28:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2024-11-18 14:28:34,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:34,551 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 45, 45, 45, 12, 12, 9, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:34,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-18 14:28:34,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:34,752 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:34,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1278376404, now seen corresponding path program 4 times [2024-11-18 14:28:34,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:34,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052004946] [2024-11-18 14:28:34,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:28:34,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:34,835 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:28:34,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 20 proven. 1431 refuted. 0 times theorem prover too weak. 5668 trivial. 0 not checked. [2024-11-18 14:28:37,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052004946] [2024-11-18 14:28:37,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052004946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:37,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695515250] [2024-11-18 14:28:37,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-18 14:28:37,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:37,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:37,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:28:37,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-18 14:28:38,002 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-18 14:28:38,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:38,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-18 14:28:38,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:38,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:28:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 1390 proven. 35 refuted. 0 times theorem prover too weak. 5694 trivial. 0 not checked. [2024-11-18 14:28:38,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7119 backedges. 12 proven. 1466 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2024-11-18 14:28:41,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695515250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:41,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:41,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 26] total 42 [2024-11-18 14:28:41,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760896969] [2024-11-18 14:28:41,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:41,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-18 14:28:41,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:41,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-18 14:28:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2024-11-18 14:28:41,553 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 42 states, 32 states have (on average 2.25) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (32), 13 states have call predecessors, (32), 12 states have call successors, (32) [2024-11-18 14:28:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:41,864 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2024-11-18 14:28:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:28:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 32 states have (on average 2.25) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (32), 13 states have call predecessors, (32), 12 states have call successors, (32) Word has length 370 [2024-11-18 14:28:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:41,866 INFO L225 Difference]: With dead ends: 107 [2024-11-18 14:28:41,866 INFO L226 Difference]: Without dead ends: 57 [2024-11-18 14:28:41,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 720 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2024-11-18 14:28:41,868 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:41,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 438 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:28:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-18 14:28:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-18 14:28:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 6 states have call successors, (6), 4 states have call predecessors, (6), 15 states have return successors, (18), 15 states have call predecessors, (18), 6 states have call successors, (18) [2024-11-18 14:28:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2024-11-18 14:28:41,876 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 370 [2024-11-18 14:28:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:41,876 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2024-11-18 14:28:41,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 32 states have (on average 2.25) internal successors, (72), 35 states have internal predecessors, (72), 12 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (32), 13 states have call predecessors, (32), 12 states have call successors, (32) [2024-11-18 14:28:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2024-11-18 14:28:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2024-11-18 14:28:41,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:41,882 INFO L215 NwaCegarLoop]: trace histogram [63, 63, 54, 54, 54, 12, 12, 9, 9, 9, 9, 9, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:41,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-18 14:28:42,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:42,086 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:42,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:42,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1564459760, now seen corresponding path program 5 times [2024-11-18 14:28:42,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:42,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365016346] [2024-11-18 14:28:42,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:28:42,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:42,432 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-18 14:28:42,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 429 proven. 631 refuted. 0 times theorem prover too weak. 8588 trivial. 0 not checked. [2024-11-18 14:28:46,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365016346] [2024-11-18 14:28:46,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365016346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246540455] [2024-11-18 14:28:46,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-18 14:28:46,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:46,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:46,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:28:46,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-18 14:28:56,968 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-11-18 14:28:56,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:56,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 1596 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-18 14:28:56,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:57,004 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 [2024-11-18 14:28:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 4366 proven. 15 refuted. 0 times theorem prover too weak. 5267 trivial. 0 not checked. [2024-11-18 14:28:57,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 6 proven. 221 refuted. 0 times theorem prover too weak. 9421 trivial. 0 not checked. [2024-11-18 14:28:59,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246540455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:59,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:59,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 18] total 44 [2024-11-18 14:28:59,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903723755] [2024-11-18 14:28:59,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:59,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-18 14:28:59,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-18 14:28:59,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2024-11-18 14:28:59,744 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 44 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 38 states have internal predecessors, (79), 21 states have call successors, (31), 8 states have call predecessors, (31), 13 states have return successors, (34), 16 states have call predecessors, (34), 21 states have call successors, (34) [2024-11-18 14:29:00,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:00,122 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2024-11-18 14:29:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:29:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 38 states have internal predecessors, (79), 21 states have call successors, (31), 8 states have call predecessors, (31), 13 states have return successors, (34), 16 states have call predecessors, (34), 21 states have call successors, (34) Word has length 415 [2024-11-18 14:29:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:00,124 INFO L225 Difference]: With dead ends: 111 [2024-11-18 14:29:00,124 INFO L226 Difference]: Without dead ends: 59 [2024-11-18 14:29:00,125 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 884 GetRequests, 830 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=452, Invalid=2628, Unknown=0, NotChecked=0, Total=3080 [2024-11-18 14:29:00,126 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:00,126 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 264 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:29:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-18 14:29:00,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-18 14:29:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 6 states have call successors, (6), 4 states have call predecessors, (6), 16 states have return successors, (19), 16 states have call predecessors, (19), 6 states have call successors, (19) [2024-11-18 14:29:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2024-11-18 14:29:00,134 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 415 [2024-11-18 14:29:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:00,135 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2024-11-18 14:29:00,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 38 states have internal predecessors, (79), 21 states have call successors, (31), 8 states have call predecessors, (31), 13 states have return successors, (34), 16 states have call predecessors, (34), 21 states have call successors, (34) [2024-11-18 14:29:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2024-11-18 14:29:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2024-11-18 14:29:00,138 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:00,138 INFO L215 NwaCegarLoop]: trace histogram [84, 84, 72, 72, 72, 15, 15, 12, 12, 12, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:00,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-18 14:29:00,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:00,339 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:00,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:00,339 INFO L85 PathProgramCache]: Analyzing trace with hash -269020316, now seen corresponding path program 6 times [2024-11-18 14:29:00,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:00,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402135088] [2024-11-18 14:29:00,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:29:00,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:00,405 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-18 14:29:00,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 17124 trivial. 0 not checked. [2024-11-18 14:29:01,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402135088] [2024-11-18 14:29:01,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402135088] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:01,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985280559] [2024-11-18 14:29:01,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-18 14:29:01,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:01,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:01,052 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:29:01,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-18 14:29:01,391 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-18 14:29:01,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:01,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-18 14:29:01,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:01,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:29:01,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 17136 trivial. 0 not checked. [2024-11-18 14:29:01,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17151 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 17118 trivial. 0 not checked. [2024-11-18 14:29:04,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985280559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:04,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:04,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 18] total 40 [2024-11-18 14:29:04,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620870297] [2024-11-18 14:29:04,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:04,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-18 14:29:04,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-18 14:29:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:29:04,276 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 40 states, 30 states have (on average 1.9) internal successors, (57), 35 states have internal predecessors, (57), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2024-11-18 14:29:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:04,675 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2024-11-18 14:29:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:29:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 1.9) internal successors, (57), 35 states have internal predecessors, (57), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) Word has length 538 [2024-11-18 14:29:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:04,678 INFO L225 Difference]: With dead ends: 72 [2024-11-18 14:29:04,679 INFO L226 Difference]: Without dead ends: 63 [2024-11-18 14:29:04,679 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1101 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=1778, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 14:29:04,680 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:04,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 223 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:29:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-18 14:29:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-11-18 14:29:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 18 states have return successors, (21), 18 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-18 14:29:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-11-18 14:29:04,691 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 538 [2024-11-18 14:29:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:04,693 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-11-18 14:29:04,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 1.9) internal successors, (57), 35 states have internal predecessors, (57), 18 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (22), 18 states have call predecessors, (22), 18 states have call successors, (22) [2024-11-18 14:29:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-11-18 14:29:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 889 [2024-11-18 14:29:04,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:04,697 INFO L215 NwaCegarLoop]: trace histogram [140, 140, 120, 120, 120, 25, 25, 20, 20, 20, 20, 20, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:04,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-18 14:29:04,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-18 14:29:04,898 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:04,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:04,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1388661156, now seen corresponding path program 7 times [2024-11-18 14:29:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:04,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157780153] [2024-11-18 14:29:04,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:29:04,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 47920 backedges. 21 proven. 631 refuted. 0 times theorem prover too weak. 47268 trivial. 0 not checked. [2024-11-18 14:29:08,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157780153] [2024-11-18 14:29:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157780153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730977774] [2024-11-18 14:29:08,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-18 14:29:08,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:08,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:08,954 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:29:08,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-18 14:29:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:29:09,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 3692 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-18 14:29:09,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:09,720 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 [2024-11-18 14:29:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 47920 backedges. 15919 proven. 24 refuted. 0 times theorem prover too weak. 31977 trivial. 0 not checked. [2024-11-18 14:29:09,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 47920 backedges. 469 proven. 209 refuted. 0 times theorem prover too weak. 47242 trivial. 0 not checked. [2024-11-18 14:29:15,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730977774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:15,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:15,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 22] total 40 [2024-11-18 14:29:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411163581] [2024-11-18 14:29:15,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:15,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-18 14:29:15,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-18 14:29:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2024-11-18 14:29:15,840 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 40 states, 30 states have (on average 2.566666666666667) internal successors, (77), 34 states have internal predecessors, (77), 18 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (34), 17 states have call predecessors, (34), 18 states have call successors, (34) [2024-11-18 14:29:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:16,178 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2024-11-18 14:29:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-18 14:29:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 30 states have (on average 2.566666666666667) internal successors, (77), 34 states have internal predecessors, (77), 18 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (34), 17 states have call predecessors, (34), 18 states have call successors, (34) Word has length 888 [2024-11-18 14:29:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:16,180 INFO L225 Difference]: With dead ends: 125 [2024-11-18 14:29:16,180 INFO L226 Difference]: Without dead ends: 67 [2024-11-18 14:29:16,181 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1805 GetRequests, 1757 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=1719, Unknown=0, NotChecked=0, Total=2162 [2024-11-18 14:29:16,182 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:16,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 286 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:29:16,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-18 14:29:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-18 14:29:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 20 states have return successors, (23), 20 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-18 14:29:16,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-11-18 14:29:16,190 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 888 [2024-11-18 14:29:16,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:16,191 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-11-18 14:29:16,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 30 states have (on average 2.566666666666667) internal successors, (77), 34 states have internal predecessors, (77), 18 states have call successors, (28), 8 states have call predecessors, (28), 13 states have return successors, (34), 17 states have call predecessors, (34), 18 states have call successors, (34) [2024-11-18 14:29:16,191 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-11-18 14:29:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1299 [2024-11-18 14:29:16,200 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:16,200 INFO L215 NwaCegarLoop]: trace histogram [210, 210, 180, 180, 180, 35, 35, 30, 30, 30, 30, 30, 30, 30, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:16,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-18 14:29:16,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-18 14:29:16,402 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:16,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:16,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1156230426, now seen corresponding path program 8 times [2024-11-18 14:29:16,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:16,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760475948] [2024-11-18 14:29:16,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:29:16,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:16,791 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:29:16,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 107602 trivial. 0 not checked. [2024-11-18 14:29:24,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:24,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760475948] [2024-11-18 14:29:24,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760475948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:24,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542912124] [2024-11-18 14:29:24,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:29:24,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:24,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-18 14:29:24,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-18 14:29:25,481 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:29:25,481 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:25,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 5312 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-18 14:29:25,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:25,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-18 14:29:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 107630 trivial. 0 not checked. [2024-11-18 14:29:25,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 107665 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 107575 trivial. 0 not checked. [2024-11-18 14:29:32,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542912124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:32,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:32,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 26] total 52 [2024-11-18 14:29:32,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722425411] [2024-11-18 14:29:32,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:32,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-18 14:29:32,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:32,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-18 14:29:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2142, Unknown=0, NotChecked=0, Total=2652 [2024-11-18 14:29:32,558 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 52 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 45 states have internal predecessors, (71), 20 states have call successors, (22), 8 states have call predecessors, (22), 19 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) [2024-11-18 14:29:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:33,050 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2024-11-18 14:29:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-18 14:29:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 45 states have internal predecessors, (71), 20 states have call successors, (22), 8 states have call predecessors, (22), 19 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) Word has length 1298 [2024-11-18 14:29:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:33,054 INFO L225 Difference]: With dead ends: 80 [2024-11-18 14:29:33,054 INFO L226 Difference]: Without dead ends: 71 [2024-11-18 14:29:33,057 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2631 GetRequests, 2575 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=657, Invalid=2649, Unknown=0, NotChecked=0, Total=3306 [2024-11-18 14:29:33,058 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:33,060 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 252 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-18 14:29:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-18 14:29:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2024-11-18 14:29:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 21 states have return successors, (24), 21 states have call predecessors, (24), 6 states have call successors, (24) [2024-11-18 14:29:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-11-18 14:29:33,074 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 1298 [2024-11-18 14:29:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:33,079 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-11-18 14:29:33,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 45 states have internal predecessors, (71), 20 states have call successors, (22), 8 states have call predecessors, (22), 19 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) [2024-11-18 14:29:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-11-18 14:29:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1556 [2024-11-18 14:29:33,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:33,092 INFO L215 NwaCegarLoop]: trace histogram [252, 252, 216, 216, 216, 42, 42, 36, 36, 36, 36, 36, 36, 36, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:33,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-18 14:29:33,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-18 14:29:33,293 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:33,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1124760959, now seen corresponding path program 9 times [2024-11-18 14:29:33,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:33,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017557028] [2024-11-18 14:29:33,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:29:33,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:34,723 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 86 check-sat command(s) [2024-11-18 14:29:34,723 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat