./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.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_6.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 76648bc32cf18f500eee0df5c8487c6c0f67ad1050d870973d578953c78cde5c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-18 14:28:24,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-18 14:28:24,531 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-18 14:28:24,536 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-18 14:28:24,537 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-18 14:28:24,554 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-18 14:28:24,556 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-18 14:28:24,556 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-18 14:28:24,557 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-18 14:28:24,557 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-18 14:28:24,558 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-18 14:28:24,559 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-18 14:28:24,559 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-18 14:28:24,559 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-18 14:28:24,561 INFO L153 SettingsManager]: * Use SBE=true [2024-11-18 14:28:24,561 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-18 14:28:24,561 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-18 14:28:24,562 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-18 14:28:24,562 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-18 14:28:24,562 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-18 14:28:24,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-18 14:28:24,563 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-18 14:28:24,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-18 14:28:24,566 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-18 14:28:24,567 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-18 14:28:24,567 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-18 14:28:24,567 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-18 14:28:24,567 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-18 14:28:24,568 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-18 14:28:24,568 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-18 14:28:24,568 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-18 14:28:24,568 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-18 14:28:24,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:28:24,568 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-18 14:28:24,569 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-18 14:28:24,577 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-18 14:28:24,578 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-18 14:28:24,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-18 14:28:24,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-18 14:28:24,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-18 14:28:24,579 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-18 14:28:24,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-18 14:28:24,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76648bc32cf18f500eee0df5c8487c6c0f67ad1050d870973d578953c78cde5c [2024-11-18 14:28:24,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-18 14:28:24,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-18 14:28:24,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-18 14:28:24,789 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-18 14:28:24,789 INFO L274 PluginConnector]: CDTParser initialized [2024-11-18 14:28:24,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c [2024-11-18 14:28:25,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-18 14:28:26,144 INFO L384 CDTParser]: Found 1 translation units. [2024-11-18 14:28:26,145 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursified_loop-simple/recursified_nested_6.c [2024-11-18 14:28:26,153 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18d61de0e/c53b299af7ba413c93ffb179e8a6dcc4/FLAGd7badccf2 [2024-11-18 14:28:26,167 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18d61de0e/c53b299af7ba413c93ffb179e8a6dcc4 [2024-11-18 14:28:26,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-18 14:28:26,171 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-18 14:28:26,172 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-18 14:28:26,172 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-18 14:28:26,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-18 14:28:26,176 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170b0d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26, skipping insertion in model container [2024-11-18 14:28:26,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,197 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-18 14:28:26,345 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_6.c[2667,2680] [2024-11-18 14:28:26,350 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:28:26,359 INFO L200 MainTranslator]: Completed pre-run [2024-11-18 14:28:26,381 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_6.c[2667,2680] [2024-11-18 14:28:26,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-18 14:28:26,398 INFO L204 MainTranslator]: Completed translation [2024-11-18 14:28:26,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26 WrapperNode [2024-11-18 14:28:26,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-18 14:28:26,399 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-18 14:28:26,399 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-18 14:28:26,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-18 14:28:26,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,412 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,434 INFO L138 Inliner]: procedures = 15, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 89 [2024-11-18 14:28:26,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-18 14:28:26,435 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-18 14:28:26,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-18 14:28:26,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-18 14:28:26,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,450 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,466 INFO L175 MemorySlicer]: Split 26 memory accesses to 5 slices as follows [2, 6, 6, 6, 6]. 23 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 1, 1, 1, 1]. The 8 writes are split as follows [0, 2, 2, 2, 2]. [2024-11-18 14:28:26,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,471 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,478 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-18 14:28:26,479 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-18 14:28:26,479 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-18 14:28:26,479 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-18 14:28:26,483 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (1/1) ... [2024-11-18 14:28:26,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-18 14:28:26,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:26,513 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 14:28:26,515 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 14:28:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_28_to_28_0 [2024-11-18 14:28:26,552 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_28_to_28_0 [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-18 14:28:26,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-18 14:28:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-18 14:28:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-18 14:28:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-18 14:28:26,553 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_25_to_26_0 [2024-11-18 14:28:26,553 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_25_to_26_0 [2024-11-18 14:28:26,554 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_28_0 [2024-11-18 14:28:26,554 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_28_0 [2024-11-18 14:28:26,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-18 14:28:26,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-18 14:28:26,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-18 14:28:26,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-18 14:28:26,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-18 14:28:26,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-18 14:28:26,556 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-18 14:28:26,557 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_27_0 [2024-11-18 14:28:26,557 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_27_0 [2024-11-18 14:28:26,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-18 14:28:26,652 INFO L238 CfgBuilder]: Building ICFG [2024-11-18 14:28:26,653 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-18 14:28:26,822 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-18 14:28:26,823 INFO L287 CfgBuilder]: Performing block encoding [2024-11-18 14:28:26,837 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-18 14:28:26,837 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-18 14:28:26,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:28:26 BoogieIcfgContainer [2024-11-18 14:28:26,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-18 14:28:26,840 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-18 14:28:26,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-18 14:28:26,843 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-18 14:28:26,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 02:28:26" (1/3) ... [2024-11-18 14:28:26,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7154592e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:28:26, skipping insertion in model container [2024-11-18 14:28:26,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 02:28:26" (2/3) ... [2024-11-18 14:28:26,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7154592e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 02:28:26, skipping insertion in model container [2024-11-18 14:28:26,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 02:28:26" (3/3) ... [2024-11-18 14:28:26,846 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_nested_6.c [2024-11-18 14:28:26,859 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-18 14:28:26,859 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-18 14:28:26,913 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-18 14:28:26,920 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;@57b58d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-18 14:28:26,923 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-18 14:28:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 34 states have (on average 1.411764705882353) internal successors, (48), 39 states have internal predecessors, (48), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:28:26,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-18 14:28:26,933 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:26,934 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:26,935 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:26,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:26,940 INFO L85 PathProgramCache]: Analyzing trace with hash 338510164, now seen corresponding path program 1 times [2024-11-18 14:28:26,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:26,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13072174] [2024-11-18 14:28:26,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:26,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:27,162 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 14:28:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:27,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13072174] [2024-11-18 14:28:27,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13072174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:27,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:27,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 14:28:27,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069471239] [2024-11-18 14:28:27,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:27,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 14:28:27,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 14:28:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 14:28:27,190 INFO L87 Difference]: Start difference. First operand has 48 states, 34 states have (on average 1.411764705882353) internal successors, (48), 39 states have internal predecessors, (48), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 14:28:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:27,221 INFO L93 Difference]: Finished difference Result 99 states and 136 transitions. [2024-11-18 14:28:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 14:28:27,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-18 14:28:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:27,246 INFO L225 Difference]: With dead ends: 99 [2024-11-18 14:28:27,248 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 14:28:27,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 14:28:27,254 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:27,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 114 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 14:28:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2024-11-18 14:28:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:28:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2024-11-18 14:28:27,289 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 13 [2024-11-18 14:28:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:27,290 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2024-11-18 14:28:27,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 14:28:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2024-11-18 14:28:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-18 14:28:27,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:27,293 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:27,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-18 14:28:27,293 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:27,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash -181604312, now seen corresponding path program 1 times [2024-11-18 14:28:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:27,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464983668] [2024-11-18 14:28:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:28:27,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:27,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464983668] [2024-11-18 14:28:27,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464983668] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:27,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-18 14:28:27,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-18 14:28:27,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820751471] [2024-11-18 14:28:27,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:27,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-18 14:28:27,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:27,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-18 14:28:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 14:28:27,380 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 14:28:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:27,401 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2024-11-18 14:28:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-18 14:28:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-18 14:28:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:27,403 INFO L225 Difference]: With dead ends: 90 [2024-11-18 14:28:27,403 INFO L226 Difference]: Without dead ends: 48 [2024-11-18 14:28:27,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-18 14:28:27,405 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:27,406 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-18 14:28:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2024-11-18 14:28:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.303030303030303) internal successors, (43), 37 states have internal predecessors, (43), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:28:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2024-11-18 14:28:27,415 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 16 [2024-11-18 14:28:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:27,415 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2024-11-18 14:28:27,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-18 14:28:27,416 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2024-11-18 14:28:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-18 14:28:27,418 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:27,418 INFO L215 NwaCegarLoop]: trace histogram [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 14:28:27,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-18 14:28:27,419 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:27,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:27,421 INFO L85 PathProgramCache]: Analyzing trace with hash 713629656, now seen corresponding path program 1 times [2024-11-18 14:28:27,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:27,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250224242] [2024-11-18 14:28:27,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:27,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:28:27,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:27,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250224242] [2024-11-18 14:28:27,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250224242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:27,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234147869] [2024-11-18 14:28:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:27,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:27,523 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 14:28:27,524 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 14:28:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:27,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 14:28:27,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-18 14:28:27,671 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-18 14:28:27,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234147869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-18 14:28:27,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-18 14:28:27,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-18 14:28:27,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430113057] [2024-11-18 14:28:27,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-18 14:28:27,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-18 14:28:27,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:27,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-18 14:28:27,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:27,678 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 14:28:27,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:27,697 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2024-11-18 14:28:27,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-18 14:28:27,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 23 [2024-11-18 14:28:27,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:27,699 INFO L225 Difference]: With dead ends: 52 [2024-11-18 14:28:27,699 INFO L226 Difference]: Without dead ends: 49 [2024-11-18 14:28:27,699 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-18 14:28:27,700 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 156 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 14:28:27,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 156 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:27,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-18 14:28:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-11-18 14:28:27,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 39 states have internal predecessors, (45), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-18 14:28:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2024-11-18 14:28:27,705 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 23 [2024-11-18 14:28:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:27,705 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2024-11-18 14:28:27,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 14:28:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2024-11-18 14:28:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-18 14:28:27,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:27,706 INFO L215 NwaCegarLoop]: trace histogram [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 14:28:27,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-18 14:28:27,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:27,912 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:27,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 713631578, now seen corresponding path program 1 times [2024-11-18 14:28:27,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:27,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473473839] [2024-11-18 14:28:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:27,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:28:27,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:27,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473473839] [2024-11-18 14:28:27,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473473839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:27,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279672920] [2024-11-18 14:28:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:27,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:27,987 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 14:28:27,988 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 14:28:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:28,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 14:28:28,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:28:28,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-18 14:28:28,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279672920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:28,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:28,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-18 14:28:28,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62527405] [2024-11-18 14:28:28,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:28,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-18 14:28:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-18 14:28:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:28,127 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:28:28,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:28,160 INFO L93 Difference]: Finished difference Result 102 states and 134 transitions. [2024-11-18 14:28:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-18 14:28:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2024-11-18 14:28:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:28,161 INFO L225 Difference]: With dead ends: 102 [2024-11-18 14:28:28,161 INFO L226 Difference]: Without dead ends: 57 [2024-11-18 14:28:28,162 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-18 14:28:28,162 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:28,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-18 14:28:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-18 14:28:28,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-18 14:28:28,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-18 14:28:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2024-11-18 14:28:28,173 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 23 [2024-11-18 14:28:28,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:28,176 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2024-11-18 14:28:28,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-18 14:28:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2024-11-18 14:28:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-18 14:28:28,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:28,177 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:28,190 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 14:28:28,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-18 14:28:28,381 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:28,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash -255366230, now seen corresponding path program 2 times [2024-11-18 14:28:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114867504] [2024-11-18 14:28:28,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:28:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:28,411 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:28:28,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-18 14:28:28,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:28,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114867504] [2024-11-18 14:28:28,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114867504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:28,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052672007] [2024-11-18 14:28:28,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:28:28,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:28,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:28,642 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 14:28:28,643 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 14:28:28,733 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:28:28,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:28:28,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:28:28,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 14:28:28,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-18 14:28:28,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052672007] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:28,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:28,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-18 14:28:28,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115486155] [2024-11-18 14:28:28,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:28,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:28:28,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:28:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:28:28,896 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 14:28:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:29,134 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2024-11-18 14:28:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-18 14:28:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 44 [2024-11-18 14:28:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:29,139 INFO L225 Difference]: With dead ends: 119 [2024-11-18 14:28:29,139 INFO L226 Difference]: Without dead ends: 65 [2024-11-18 14:28:29,139 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2024-11-18 14:28:29,140 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:29,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 145 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:28:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-18 14:28:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-18 14:28:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 50 states have internal predecessors, (56), 13 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-11-18 14:28:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2024-11-18 14:28:29,150 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 44 [2024-11-18 14:28:29,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:29,151 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2024-11-18 14:28:29,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-18 14:28:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2024-11-18 14:28:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-18 14:28:29,156 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:29,156 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:29,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-18 14:28:29,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:29,357 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:29,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:29,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2077730892, now seen corresponding path program 1 times [2024-11-18 14:28:29,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:29,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457154714] [2024-11-18 14:28:29,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:29,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-11-18 14:28:29,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:29,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457154714] [2024-11-18 14:28:29,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457154714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:29,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866627662] [2024-11-18 14:28:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:29,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:29,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:29,710 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 14:28:29,711 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 14:28:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:29,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-18 14:28:29,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-18 14:28:29,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-11-18 14:28:30,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866627662] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:30,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:30,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2024-11-18 14:28:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077459128] [2024-11-18 14:28:30,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:30,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-18 14:28:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-18 14:28:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-18 14:28:30,110 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-18 14:28:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:30,244 INFO L93 Difference]: Finished difference Result 192 states and 278 transitions. [2024-11-18 14:28:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:28:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 124 [2024-11-18 14:28:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:30,246 INFO L225 Difference]: With dead ends: 192 [2024-11-18 14:28:30,247 INFO L226 Difference]: Without dead ends: 130 [2024-11-18 14:28:30,248 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-18 14:28:30,249 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:30,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 171 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-18 14:28:30,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-18 14:28:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 92 states have (on average 1.141304347826087) internal successors, (105), 96 states have internal predecessors, (105), 31 states have call successors, (31), 4 states have call predecessors, (31), 6 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2024-11-18 14:28:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2024-11-18 14:28:30,266 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 124 [2024-11-18 14:28:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:30,266 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2024-11-18 14:28:30,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-18 14:28:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2024-11-18 14:28:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 722 [2024-11-18 14:28:30,276 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:30,276 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:30,291 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 14:28:30,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:30,477 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:30,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash 658392534, now seen corresponding path program 1 times [2024-11-18 14:28:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:30,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119761513] [2024-11-18 14:28:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:30,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12730 backedges. 58 proven. 391 refuted. 0 times theorem prover too weak. 12281 trivial. 0 not checked. [2024-11-18 14:28:31,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:31,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119761513] [2024-11-18 14:28:31,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119761513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:31,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309814768] [2024-11-18 14:28:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:31,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:31,798 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 14:28:31,800 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 14:28:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:32,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 5108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-18 14:28:32,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12730 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 11988 trivial. 0 not checked. [2024-11-18 14:28:32,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12730 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 11988 trivial. 0 not checked. [2024-11-18 14:28:33,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309814768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:33,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:33,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-11-18 14:28:33,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376063669] [2024-11-18 14:28:33,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:33,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-18 14:28:33,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-18 14:28:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-18 14:28:33,563 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-18 14:28:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:33,700 INFO L93 Difference]: Finished difference Result 299 states and 432 transitions. [2024-11-18 14:28:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-18 14:28:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 721 [2024-11-18 14:28:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:33,702 INFO L225 Difference]: With dead ends: 299 [2024-11-18 14:28:33,704 INFO L226 Difference]: Without dead ends: 174 [2024-11-18 14:28:33,705 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1447 GetRequests, 1432 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-18 14:28:33,706 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 18 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:33,706 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 280 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-18 14:28:33,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2024-11-18 14:28:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 123 states have (on average 1.1219512195121952) internal successors, (138), 127 states have internal predecessors, (138), 43 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (46), 43 states have call predecessors, (46), 43 states have call successors, (46) [2024-11-18 14:28:33,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 227 transitions. [2024-11-18 14:28:33,732 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 227 transitions. Word has length 721 [2024-11-18 14:28:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:33,732 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 227 transitions. [2024-11-18 14:28:33,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-18 14:28:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 227 transitions. [2024-11-18 14:28:33,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1472 [2024-11-18 14:28:33,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:33,765 INFO L215 NwaCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:33,792 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 14:28:33,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:33,966 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:33,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:33,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1609704042, now seen corresponding path program 1 times [2024-11-18 14:28:33,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:33,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465689548] [2024-11-18 14:28:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 41019 backedges. 88 proven. 805 refuted. 0 times theorem prover too weak. 40126 trivial. 0 not checked. [2024-11-18 14:28:36,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:36,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465689548] [2024-11-18 14:28:36,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465689548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:36,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664036197] [2024-11-18 14:28:36,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:36,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:36,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:36,266 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 14:28:36,267 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 14:28:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:37,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 9344 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-18 14:28:37,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:37,598 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 14:28:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41019 backedges. 12853 proven. 3 refuted. 0 times theorem prover too weak. 28163 trivial. 0 not checked. [2024-11-18 14:28:37,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 41019 backedges. 828 proven. 758 refuted. 0 times theorem prover too weak. 39433 trivial. 0 not checked. [2024-11-18 14:28:39,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664036197] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:39,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:39,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 21 [2024-11-18 14:28:39,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19057814] [2024-11-18 14:28:39,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:39,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-18 14:28:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-18 14:28:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-18 14:28:39,652 INFO L87 Difference]: Start difference. First operand 174 states and 227 transitions. Second operand has 21 states, 16 states have (on average 4.9375) internal successors, (79), 17 states have internal predecessors, (79), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (28), 6 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-18 14:28:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:39,955 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2024-11-18 14:28:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-18 14:28:39,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 4.9375) internal successors, (79), 17 states have internal predecessors, (79), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (28), 6 states have call predecessors, (28), 9 states have call successors, (28) Word has length 1471 [2024-11-18 14:28:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:39,961 INFO L225 Difference]: With dead ends: 347 [2024-11-18 14:28:39,961 INFO L226 Difference]: Without dead ends: 178 [2024-11-18 14:28:39,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2956 GetRequests, 2928 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-11-18 14:28:39,962 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:39,963 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 378 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:28:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-18 14:28:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-11-18 14:28:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 125 states have (on average 1.12) internal successors, (140), 129 states have internal predecessors, (140), 43 states have call successors, (43), 4 states have call predecessors, (43), 9 states have return successors, (48), 44 states have call predecessors, (48), 43 states have call successors, (48) [2024-11-18 14:28:39,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 231 transitions. [2024-11-18 14:28:39,990 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 231 transitions. Word has length 1471 [2024-11-18 14:28:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:39,991 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 231 transitions. [2024-11-18 14:28:39,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 4.9375) internal successors, (79), 17 states have internal predecessors, (79), 9 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (28), 6 states have call predecessors, (28), 9 states have call successors, (28) [2024-11-18 14:28:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 231 transitions. [2024-11-18 14:28:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2624 [2024-11-18 14:28:40,052 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:40,052 INFO L215 NwaCegarLoop]: trace histogram [144, 144, 144, 144, 108, 108, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:40,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-18 14:28:40,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:40,253 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:40,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:40,254 INFO L85 PathProgramCache]: Analyzing trace with hash 515049110, now seen corresponding path program 1 times [2024-11-18 14:28:40,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:40,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423109030] [2024-11-18 14:28:40,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:40,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 137643 backedges. 408 proven. 1873 refuted. 0 times theorem prover too weak. 135362 trivial. 0 not checked. [2024-11-18 14:28:48,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:28:48,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423109030] [2024-11-18 14:28:48,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423109030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:28:48,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554387506] [2024-11-18 14:28:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-18 14:28:48,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:48,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:28:48,265 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 14:28:48,267 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 14:28:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-18 14:28:50,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 14888 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-18 14:28:50,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:28:50,321 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 14:28:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 137643 backedges. 51586 proven. 3 refuted. 0 times theorem prover too weak. 86054 trivial. 0 not checked. [2024-11-18 14:28:50,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:28:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 137643 backedges. 2323 proven. 474 refuted. 0 times theorem prover too weak. 134846 trivial. 0 not checked. [2024-11-18 14:28:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554387506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:28:54,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:28:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2024-11-18 14:28:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842574534] [2024-11-18 14:28:54,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:28:54,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-18 14:28:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:28:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-18 14:28:54,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-11-18 14:28:54,299 INFO L87 Difference]: Start difference. First operand 178 states and 231 transitions. Second operand has 22 states, 16 states have (on average 5.25) internal successors, (84), 19 states have internal predecessors, (84), 11 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (30), 8 states have call predecessors, (30), 11 states have call successors, (30) [2024-11-18 14:28:54,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:28:54,481 INFO L93 Difference]: Finished difference Result 355 states and 502 transitions. [2024-11-18 14:28:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-18 14:28:54,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 5.25) internal successors, (84), 19 states have internal predecessors, (84), 11 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (30), 8 states have call predecessors, (30), 11 states have call successors, (30) Word has length 2623 [2024-11-18 14:28:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:28:54,483 INFO L225 Difference]: With dead ends: 355 [2024-11-18 14:28:54,483 INFO L226 Difference]: Without dead ends: 182 [2024-11-18 14:28:54,484 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5259 GetRequests, 5234 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 14:28:54,485 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-18 14:28:54,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 387 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-18 14:28:54,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-18 14:28:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2024-11-18 14:28:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 131 states have internal predecessors, (142), 43 states have call successors, (43), 4 states have call predecessors, (43), 11 states have return successors, (50), 46 states have call predecessors, (50), 43 states have call successors, (50) [2024-11-18 14:28:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 235 transitions. [2024-11-18 14:28:54,503 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 235 transitions. Word has length 2623 [2024-11-18 14:28:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:28:54,504 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 235 transitions. [2024-11-18 14:28:54,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 5.25) internal successors, (84), 19 states have internal predecessors, (84), 11 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (30), 8 states have call predecessors, (30), 11 states have call successors, (30) [2024-11-18 14:28:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 235 transitions. [2024-11-18 14:28:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4928 [2024-11-18 14:28:54,753 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:28:54,754 INFO L215 NwaCegarLoop]: trace histogram [432, 432, 288, 288, 216, 216, 216, 216, 216, 216, 216, 216, 216, 216, 108, 108, 72, 72, 72, 72, 72, 72, 72, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:28:54,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-18 14:28:54,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:28:54,955 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:28:54,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:28:54,956 INFO L85 PathProgramCache]: Analyzing trace with hash 205145750, now seen corresponding path program 2 times [2024-11-18 14:28:54,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:28:54,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799331922] [2024-11-18 14:28:54,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:28:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:28:55,868 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:28:55,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 675627 backedges. 700 proven. 1713 refuted. 0 times theorem prover too weak. 673214 trivial. 0 not checked. [2024-11-18 14:29:19,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799331922] [2024-11-18 14:29:19,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799331922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:19,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983755297] [2024-11-18 14:29:19,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-18 14:29:19,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:19,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:19,207 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 14:29:19,208 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 14:29:22,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-18 14:29:22,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:22,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 24536 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-18 14:29:22,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:22,638 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 14:29:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 675627 backedges. 161841 proven. 15 refuted. 0 times theorem prover too weak. 513771 trivial. 0 not checked. [2024-11-18 14:29:22,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-18 14:29:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 675627 backedges. 1398 proven. 6419 refuted. 0 times theorem prover too weak. 667810 trivial. 0 not checked. [2024-11-18 14:29:31,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983755297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-18 14:29:31,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-18 14:29:31,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 18] total 37 [2024-11-18 14:29:31,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970527123] [2024-11-18 14:29:31,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-18 14:29:31,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-18 14:29:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-18 14:29:31,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-18 14:29:31,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2024-11-18 14:29:31,762 INFO L87 Difference]: Start difference. First operand 182 states and 235 transitions. Second operand has 37 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 31 states have internal predecessors, (97), 17 states have call successors, (34), 8 states have call predecessors, (34), 13 states have return successors, (39), 16 states have call predecessors, (39), 17 states have call successors, (39) [2024-11-18 14:29:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-18 14:29:32,201 INFO L93 Difference]: Finished difference Result 363 states and 510 transitions. [2024-11-18 14:29:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-18 14:29:32,201 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 31 states have internal predecessors, (97), 17 states have call successors, (34), 8 states have call predecessors, (34), 13 states have return successors, (39), 16 states have call predecessors, (39), 17 states have call successors, (39) Word has length 4927 [2024-11-18 14:29:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-18 14:29:32,203 INFO L225 Difference]: With dead ends: 363 [2024-11-18 14:29:32,203 INFO L226 Difference]: Without dead ends: 186 [2024-11-18 14:29:32,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9880 GetRequests, 9831 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=387, Invalid=2163, Unknown=0, NotChecked=0, Total=2550 [2024-11-18 14:29:32,205 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-18 14:29:32,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 598 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-18 14:29:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-18 14:29:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2024-11-18 14:29:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 129 states have (on average 1.1162790697674418) internal successors, (144), 133 states have internal predecessors, (144), 43 states have call successors, (43), 4 states have call predecessors, (43), 13 states have return successors, (52), 48 states have call predecessors, (52), 43 states have call successors, (52) [2024-11-18 14:29:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 239 transitions. [2024-11-18 14:29:32,219 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 239 transitions. Word has length 4927 [2024-11-18 14:29:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-18 14:29:32,221 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 239 transitions. [2024-11-18 14:29:32,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 31 states have internal predecessors, (97), 17 states have call successors, (34), 8 states have call predecessors, (34), 13 states have return successors, (39), 16 states have call predecessors, (39), 17 states have call successors, (39) [2024-11-18 14:29:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 239 transitions. [2024-11-18 14:29:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8780 [2024-11-18 14:29:32,584 INFO L207 NwaCegarLoop]: Found error trace [2024-11-18 14:29:32,585 INFO L215 NwaCegarLoop]: trace histogram [864, 864, 540, 540, 432, 432, 432, 432, 432, 432, 432, 432, 432, 432, 144, 144, 108, 108, 108, 108, 108, 108, 108, 72, 72, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-18 14:29:32,643 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 14:29:32,786 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,SelfDestructingSolverStorable9 [2024-11-18 14:29:32,786 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-18 14:29:32,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-18 14:29:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash -598631850, now seen corresponding path program 3 times [2024-11-18 14:29:32,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-18 14:29:32,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310383061] [2024-11-18 14:29:32,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:29:32,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-18 14:29:33,293 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:29:33,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2518557 backedges. 787 proven. 3 refuted. 0 times theorem prover too weak. 2517767 trivial. 0 not checked. [2024-11-18 14:29:33,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-18 14:29:33,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310383061] [2024-11-18 14:29:33,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310383061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-18 14:29:33,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420346950] [2024-11-18 14:29:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-18 14:29:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-18 14:29:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-18 14:29:33,534 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 14:29:33,534 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 14:29:35,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-18 14:29:35,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-18 14:29:35,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-18 14:29:35,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-18 14:29:35,882 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 14:29:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2518557 backedges. 787 proven. 3 refuted. 0 times theorem prover too weak. 2517767 trivial. 0 not checked. [2024-11-18 14:29:36,033 INFO L311 TraceCheckSpWp]: Computing backward predicates...