./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/ex3_forlist.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d 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/ldv-regression/ex3_forlist.i -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 ddbd4e73adf4663f87721f5aa250c32f7b058621a618ab1d03544a940de1ce0e --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 13:47:55,732 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 13:47:55,799 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 13:47:55,803 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 13:47:55,803 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 13:47:55,833 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 13:47:55,834 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 13:47:55,834 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 13:47:55,835 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 13:47:55,835 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 13:47:55,835 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 13:47:55,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 13:47:55,836 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 13:47:55,837 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 13:47:55,837 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 13:47:55,838 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 13:47:55,838 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 13:47:55,838 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 13:47:55,839 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 13:47:55,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 13:47:55,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 13:47:55,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 13:47:55,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 13:47:55,841 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 13:47:55,841 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 13:47:55,841 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 13:47:55,842 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 13:47:55,842 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 13:47:55,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 13:47:55,843 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 13:47:55,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 13:47:55,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 13:47:55,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 13:47:55,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 13:47:55,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 13:47:55,848 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 13:47:55,848 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 13:47:55,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 13:47:55,848 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 13:47:55,848 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 13:47:55,848 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 13:47:55,849 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 13:47:55,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ddbd4e73adf4663f87721f5aa250c32f7b058621a618ab1d03544a940de1ce0e [2024-11-08 13:47:56,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 13:47:56,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 13:47:56,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 13:47:56,130 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 13:47:56,131 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 13:47:56,132 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/ex3_forlist.i [2024-11-08 13:47:57,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 13:47:57,724 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 13:47:57,725 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/ex3_forlist.i [2024-11-08 13:47:57,731 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3967c7c0/35f1f9cb461e486490ab5b7ae791aaae/FLAGff9a11cf3 [2024-11-08 13:47:58,122 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3967c7c0/35f1f9cb461e486490ab5b7ae791aaae [2024-11-08 13:47:58,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 13:47:58,125 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 13:47:58,126 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 13:47:58,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 13:47:58,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 13:47:58,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d839b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58, skipping insertion in model container [2024-11-08 13:47:58,134 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,157 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 13:47:58,297 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/ldv-regression/ex3_forlist.i[293,306] [2024-11-08 13:47:58,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 13:47:58,328 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 13:47:58,338 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/ldv-regression/ex3_forlist.i[293,306] [2024-11-08 13:47:58,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 13:47:58,368 INFO L204 MainTranslator]: Completed translation [2024-11-08 13:47:58,369 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58 WrapperNode [2024-11-08 13:47:58,369 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 13:47:58,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 13:47:58,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 13:47:58,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 13:47:58,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,414 INFO L138 Inliner]: procedures = 19, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 69 [2024-11-08 13:47:58,414 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 13:47:58,415 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 13:47:58,415 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 13:47:58,415 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 13:47:58,423 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,427 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,453 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 6, 6, 0]. 43 percent of accesses are in the largest equivalence class. The 6 initializations are split as follows [2, 2, 2, 0]. The 5 writes are split as follows [0, 2, 3, 0]. [2024-11-08 13:47:58,454 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,454 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,469 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 13:47:58,470 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 13:47:58,471 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 13:47:58,471 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 13:47:58,472 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (1/1) ... [2024-11-08 13:47:58,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 13:47:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 13:47:58,511 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) [2024-11-08 13:47:58,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 13:47:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-08 13:47:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-08 13:47:58,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-08 13:47:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-08 13:47:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-08 13:47:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-08 13:47:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-08 13:47:58,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-08 13:47:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 13:47:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-08 13:47:58,574 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-08 13:47:58,574 INFO L130 BoogieDeclarations]: Found specification of procedure g [2024-11-08 13:47:58,575 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2024-11-08 13:47:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 13:47:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 13:47:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 13:47:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 13:47:58,575 INFO L130 BoogieDeclarations]: Found specification of procedure fake_malloc [2024-11-08 13:47:58,576 INFO L138 BoogieDeclarations]: Found implementation of procedure fake_malloc [2024-11-08 13:47:58,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-08 13:47:58,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-08 13:47:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-08 13:47:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-08 13:47:58,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 13:47:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 13:47:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 13:47:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 13:47:58,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 13:47:58,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 13:47:58,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 13:47:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 13:47:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 13:47:58,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 13:47:58,700 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 13:47:58,702 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 13:47:58,912 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-08 13:47:58,912 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 13:47:58,929 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 13:47:58,930 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 13:47:58,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 01:47:58 BoogieIcfgContainer [2024-11-08 13:47:58,930 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 13:47:58,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 13:47:58,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 13:47:58,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 13:47:58,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 01:47:58" (1/3) ... [2024-11-08 13:47:58,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15194179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 01:47:58, skipping insertion in model container [2024-11-08 13:47:58,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 01:47:58" (2/3) ... [2024-11-08 13:47:58,937 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15194179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 01:47:58, skipping insertion in model container [2024-11-08 13:47:58,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 01:47:58" (3/3) ... [2024-11-08 13:47:58,939 INFO L112 eAbstractionObserver]: Analyzing ICFG ex3_forlist.i [2024-11-08 13:47:58,957 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 13:47:58,958 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 13:47:59,007 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 13:47:59,013 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;@2036bab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 13:47:59,014 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 13:47:59,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-08 13:47:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 13:47:59,024 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:47:59,024 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:47:59,025 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:47:59,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:47:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash -431383929, now seen corresponding path program 1 times [2024-11-08 13:47:59,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:47:59,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950152336] [2024-11-08 13:47:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:47:59,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:47:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,252 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 13:47:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-08 13:47:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 13:47:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 13:47:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 13:47:59,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:47:59,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950152336] [2024-11-08 13:47:59,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950152336] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 13:47:59,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 13:47:59,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 13:47:59,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112131154] [2024-11-08 13:47:59,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 13:47:59,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 13:47:59,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:47:59,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 13:47:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 13:47:59,379 INFO L87 Difference]: Start difference. First operand has 38 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 13:47:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:47:59,576 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2024-11-08 13:47:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 13:47:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-11-08 13:47:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:47:59,587 INFO L225 Difference]: With dead ends: 82 [2024-11-08 13:47:59,588 INFO L226 Difference]: Without dead ends: 44 [2024-11-08 13:47:59,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 13:47:59,595 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 13:47:59,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 13:47:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-08 13:47:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2024-11-08 13:47:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-08 13:47:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-08 13:47:59,644 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 31 [2024-11-08 13:47:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:47:59,645 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-08 13:47:59,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 13:47:59,646 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-08 13:47:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 13:47:59,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:47:59,648 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:47:59,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 13:47:59,649 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:47:59,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:47:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash -621686623, now seen corresponding path program 1 times [2024-11-08 13:47:59,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:47:59,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209455281] [2024-11-08 13:47:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:47:59,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:47:59,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,836 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-08 13:47:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-08 13:47:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 13:47:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,891 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 13:47:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:47:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 13:47:59,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:47:59,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209455281] [2024-11-08 13:47:59,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209455281] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 13:47:59,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 13:47:59,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 13:47:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019972478] [2024-11-08 13:47:59,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 13:47:59,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 13:47:59,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:47:59,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 13:47:59,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 13:47:59,916 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 13:48:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:48:00,068 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2024-11-08 13:48:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 13:48:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2024-11-08 13:48:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:48:00,072 INFO L225 Difference]: With dead ends: 75 [2024-11-08 13:48:00,072 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 13:48:00,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 13:48:00,074 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 13:48:00,076 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 40 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 13:48:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 13:48:00,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-11-08 13:48:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-08 13:48:00,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-08 13:48:00,088 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2024-11-08 13:48:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:48:00,088 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-08 13:48:00,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 13:48:00,089 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-08 13:48:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 13:48:00,092 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:48:00,092 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:48:00,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 13:48:00,093 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:48:00,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:48:00,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1110999905, now seen corresponding path program 1 times [2024-11-08 13:48:00,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:48:00,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215592782] [2024-11-08 13:48:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:00,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:48:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,189 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 13:48:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 13:48:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-08 13:48:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,225 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 13:48:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 13:48:00,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:48:00,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215592782] [2024-11-08 13:48:00,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215592782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 13:48:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443522981] [2024-11-08 13:48:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:00,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:00,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 13:48:00,242 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) [2024-11-08 13:48:00,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 13:48:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-08 13:48:00,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 13:48:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 13:48:00,369 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 13:48:00,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443522981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 13:48:00,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 13:48:00,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2024-11-08 13:48:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10737740] [2024-11-08 13:48:00,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 13:48:00,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 13:48:00,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:48:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 13:48:00,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 13:48:00,371 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 13:48:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:48:00,394 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2024-11-08 13:48:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 13:48:00,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-11-08 13:48:00,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:48:00,398 INFO L225 Difference]: With dead ends: 56 [2024-11-08 13:48:00,398 INFO L226 Difference]: Without dead ends: 37 [2024-11-08 13:48:00,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-08 13:48:00,399 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 72 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 [2024-11-08 13:48:00,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 72 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 13:48:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-08 13:48:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-11-08 13:48:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-08 13:48:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-11-08 13:48:00,411 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2024-11-08 13:48:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:48:00,414 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-11-08 13:48:00,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-08 13:48:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-11-08 13:48:00,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-08 13:48:00,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:48:00,416 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:48:00,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 13:48:00,620 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 [2024-11-08 13:48:00,621 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:48:00,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:48:00,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1230450813, now seen corresponding path program 1 times [2024-11-08 13:48:00,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:48:00,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529764646] [2024-11-08 13:48:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:48:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-11-08 13:48:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,744 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 13:48:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,762 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-08 13:48:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,772 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-08 13:48:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 13:48:00,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:48:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529764646] [2024-11-08 13:48:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529764646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 13:48:00,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873967066] [2024-11-08 13:48:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:00,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:00,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 13:48:00,785 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) [2024-11-08 13:48:00,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 13:48:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:00,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 13:48:00,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 13:48:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 13:48:00,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 13:48:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 13:48:00,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873967066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 13:48:00,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 13:48:00,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2024-11-08 13:48:00,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219084265] [2024-11-08 13:48:00,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 13:48:00,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 13:48:00,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:48:00,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 13:48:00,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-08 13:48:00,989 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-08 13:48:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:48:01,177 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2024-11-08 13:48:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 13:48:01,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 35 [2024-11-08 13:48:01,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:48:01,179 INFO L225 Difference]: With dead ends: 78 [2024-11-08 13:48:01,179 INFO L226 Difference]: Without dead ends: 48 [2024-11-08 13:48:01,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-08 13:48:01,180 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 13:48:01,181 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 62 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 13:48:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-08 13:48:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2024-11-08 13:48:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-08 13:48:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-08 13:48:01,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 35 [2024-11-08 13:48:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:48:01,194 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-08 13:48:01,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-11-08 13:48:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-08 13:48:01,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 13:48:01,197 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:48:01,198 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:48:01,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 13:48:01,398 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 [2024-11-08 13:48:01,399 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:48:01,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:48:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash 828026235, now seen corresponding path program 2 times [2024-11-08 13:48:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:48:01,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915723232] [2024-11-08 13:48:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:48:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:01,770 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 13:48:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:01,776 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 13:48:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:01,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 13:48:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:01,812 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-08 13:48:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 13:48:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:48:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915723232] [2024-11-08 13:48:01,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915723232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 13:48:01,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 13:48:01,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-08 13:48:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657757413] [2024-11-08 13:48:01,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 13:48:01,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-08 13:48:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:48:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-08 13:48:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-08 13:48:01,896 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 13:48:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:48:02,361 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2024-11-08 13:48:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 13:48:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2024-11-08 13:48:02,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:48:02,363 INFO L225 Difference]: With dead ends: 90 [2024-11-08 13:48:02,363 INFO L226 Difference]: Without dead ends: 79 [2024-11-08 13:48:02,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2024-11-08 13:48:02,364 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 136 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 13:48:02,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 74 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 13:48:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-08 13:48:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2024-11-08 13:48:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 50 states have internal predecessors, (61), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-11-08 13:48:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2024-11-08 13:48:02,382 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 37 [2024-11-08 13:48:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:48:02,383 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2024-11-08 13:48:02,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-08 13:48:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2024-11-08 13:48:02,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 13:48:02,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:48:02,384 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:48:02,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 13:48:02,385 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:48:02,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:48:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2143087823, now seen corresponding path program 1 times [2024-11-08 13:48:02,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:48:02,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353281560] [2024-11-08 13:48:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:02,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:48:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:02,708 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 13:48:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:02,743 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 13:48:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:02,769 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 13:48:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:02,857 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-08 13:48:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 13:48:02,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:48:02,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353281560] [2024-11-08 13:48:02,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353281560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 13:48:02,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478792146] [2024-11-08 13:48:02,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:02,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:02,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 13:48:02,972 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) [2024-11-08 13:48:02,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 13:48:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:03,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 13:48:03,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 13:48:03,403 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 [2024-11-08 13:48:03,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 13:48:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 13:48:03,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 13:48:03,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-08 13:48:03,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-08 13:48:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 13:48:04,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478792146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 13:48:04,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 13:48:04,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2024-11-08 13:48:04,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462516972] [2024-11-08 13:48:04,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 13:48:04,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-08 13:48:04,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:48:04,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-08 13:48:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2024-11-08 13:48:04,107 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 26 states have internal predecessors, (66), 9 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-08 13:48:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:48:05,035 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2024-11-08 13:48:05,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-08 13:48:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 26 states have internal predecessors, (66), 9 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 40 [2024-11-08 13:48:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:48:05,037 INFO L225 Difference]: With dead ends: 136 [2024-11-08 13:48:05,037 INFO L226 Difference]: Without dead ends: 105 [2024-11-08 13:48:05,039 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=386, Invalid=2370, Unknown=0, NotChecked=0, Total=2756 [2024-11-08 13:48:05,040 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 438 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 13:48:05,040 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 98 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 13:48:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-08 13:48:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 90. [2024-11-08 13:48:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 71 states have internal predecessors, (88), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-08 13:48:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2024-11-08 13:48:05,059 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 40 [2024-11-08 13:48:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:48:05,060 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2024-11-08 13:48:05,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 26 states have internal predecessors, (66), 9 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-08 13:48:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2024-11-08 13:48:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-08 13:48:05,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:48:05,061 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:48:05,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 13:48:05,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:05,268 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:48:05,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:48:05,268 INFO L85 PathProgramCache]: Analyzing trace with hash -309149075, now seen corresponding path program 1 times [2024-11-08 13:48:05,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:48:05,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024168837] [2024-11-08 13:48:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:05,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:48:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:05,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 13:48:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:05,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 13:48:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:05,334 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 13:48:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:05,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-11-08 13:48:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 13:48:05,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:48:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024168837] [2024-11-08 13:48:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024168837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 13:48:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316375850] [2024-11-08 13:48:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:05,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:05,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 13:48:05,367 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) [2024-11-08 13:48:05,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 13:48:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:05,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 13:48:05,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 13:48:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 13:48:05,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 13:48:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 13:48:05,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316375850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 13:48:05,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 13:48:05,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 6 [2024-11-08 13:48:05,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977707654] [2024-11-08 13:48:05,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 13:48:05,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 13:48:05,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:48:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 13:48:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 13:48:05,518 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 13:48:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:48:05,710 INFO L93 Difference]: Finished difference Result 166 states and 214 transitions. [2024-11-08 13:48:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 13:48:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-11-08 13:48:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:48:05,711 INFO L225 Difference]: With dead ends: 166 [2024-11-08 13:48:05,711 INFO L226 Difference]: Without dead ends: 102 [2024-11-08 13:48:05,712 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-08 13:48:05,713 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 13:48:05,713 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 67 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 13:48:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-08 13:48:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2024-11-08 13:48:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.295774647887324) internal successors, (92), 75 states have internal predecessors, (92), 12 states have call successors, (12), 7 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-08 13:48:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2024-11-08 13:48:05,732 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 41 [2024-11-08 13:48:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:48:05,732 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2024-11-08 13:48:05,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 13:48:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2024-11-08 13:48:05,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 13:48:05,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:48:05,734 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:48:05,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 13:48:05,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:05,935 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:48:05,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:48:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1965354537, now seen corresponding path program 1 times [2024-11-08 13:48:05,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:48:05,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343975077] [2024-11-08 13:48:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:05,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:48:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:06,698 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 13:48:06,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:06,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 13:48:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:06,771 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 13:48:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:06,932 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-11-08 13:48:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:07,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 13:48:07,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:48:07,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343975077] [2024-11-08 13:48:07,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343975077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 13:48:07,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504681726] [2024-11-08 13:48:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:07,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:07,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 13:48:07,139 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) [2024-11-08 13:48:07,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 13:48:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:07,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-08 13:48:07,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 13:48:07,593 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 [2024-11-08 13:48:07,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 13:48:07,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 13:48:08,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 13:48:08,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-08 13:48:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 13:48:08,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504681726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 13:48:08,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 13:48:08,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 51 [2024-11-08 13:48:08,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285940503] [2024-11-08 13:48:08,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 13:48:08,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 13:48:08,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:48:08,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 13:48:08,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2394, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 13:48:08,258 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 51 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 35 states have internal predecessors, (82), 12 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-08 13:48:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 13:48:10,549 INFO L93 Difference]: Finished difference Result 236 states and 302 transitions. [2024-11-08 13:48:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-08 13:48:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 35 states have internal predecessors, (82), 12 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) Word has length 43 [2024-11-08 13:48:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 13:48:10,551 INFO L225 Difference]: With dead ends: 236 [2024-11-08 13:48:10,552 INFO L226 Difference]: Without dead ends: 186 [2024-11-08 13:48:10,555 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=709, Invalid=6773, Unknown=0, NotChecked=0, Total=7482 [2024-11-08 13:48:10,555 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 320 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 13:48:10,556 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 201 Invalid, 2489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 13:48:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-08 13:48:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2024-11-08 13:48:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 116 states have internal predecessors, (143), 14 states have call successors, (14), 10 states have call predecessors, (14), 14 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2024-11-08 13:48:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2024-11-08 13:48:10,578 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 43 [2024-11-08 13:48:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 13:48:10,579 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2024-11-08 13:48:10,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 44 states have (on average 1.8636363636363635) internal successors, (82), 35 states have internal predecessors, (82), 12 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (12), 12 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-08 13:48:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2024-11-08 13:48:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-08 13:48:10,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 13:48:10,580 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 13:48:10,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 13:48:10,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:10,781 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting gErr0ASSERT_VIOLATIONERROR_FUNCTION === [gErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 13:48:10,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 13:48:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1392073365, now seen corresponding path program 2 times [2024-11-08 13:48:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 13:48:10,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155165502] [2024-11-08 13:48:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 13:48:10,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 13:48:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:11,227 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-08 13:48:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:11,264 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-08 13:48:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:11,293 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 13:48:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:11,569 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 13:48:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 13:48:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 13:48:11,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 13:48:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155165502] [2024-11-08 13:48:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155165502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 13:48:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485670684] [2024-11-08 13:48:11,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 13:48:11,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 13:48:11,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 13:48:11,766 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) [2024-11-08 13:48:11,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 13:48:11,875 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 13:48:11,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 13:48:11,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 13:48:11,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 13:48:11,966 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 [2024-11-08 13:48:12,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-08 13:48:12,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 13:48:12,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-08 13:48:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 13:48:12,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 13:48:12,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-08 13:48:12,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-08 13:48:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-08 13:48:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485670684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 13:48:12,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 13:48:12,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 10] total 38 [2024-11-08 13:48:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250381757] [2024-11-08 13:48:12,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 13:48:12,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-08 13:48:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 13:48:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-08 13:48:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1271, Unknown=3, NotChecked=0, Total=1406 [2024-11-08 13:48:12,724 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand has 38 states, 36 states have (on average 2.388888888888889) internal successors, (86), 31 states have internal predecessors, (86), 10 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-08 13:48:22,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:48:26,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:48:30,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:48:34,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:48:38,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:48:42,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:48:50,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:48:58,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:02,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:06,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:10,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:14,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:18,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:22,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:26,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:30,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-08 13:49:34,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]