./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.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 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-23 23:47:24,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-23 23:47:24,476 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-23 23:47:24,485 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-23 23:47:24,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-23 23:47:24,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-23 23:47:24,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-23 23:47:24,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-23 23:47:24,513 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-23 23:47:24,513 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-23 23:47:24,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-23 23:47:24,514 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-23 23:47:24,514 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-23 23:47:24,515 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-23 23:47:24,516 INFO L153 SettingsManager]: * Use SBE=true [2024-10-23 23:47:24,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-23 23:47:24,516 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-23 23:47:24,517 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-23 23:47:24,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-23 23:47:24,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-23 23:47:24,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-23 23:47:24,520 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-23 23:47:24,520 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-23 23:47:24,520 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-23 23:47:24,520 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-23 23:47:24,520 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-23 23:47:24,521 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-23 23:47:24,521 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-23 23:47:24,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-23 23:47:24,521 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-23 23:47:24,521 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-23 23:47:24,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-23 23:47:24,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 23:47:24,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-23 23:47:24,522 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-23 23:47:24,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-23 23:47:24,522 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-23 23:47:24,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-23 23:47:24,522 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-23 23:47:24,522 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-23 23:47:24,523 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-23 23:47:24,524 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-23 23:47:24,524 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2024-10-23 23:47:24,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-23 23:47:24,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-23 23:47:24,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-23 23:47:24,736 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-23 23:47:24,737 INFO L274 PluginConnector]: CDTParser initialized [2024-10-23 23:47:24,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-10-23 23:47:25,867 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-23 23:47:26,095 INFO L384 CDTParser]: Found 1 translation units. [2024-10-23 23:47:26,095 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2024-10-23 23:47:26,105 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b17835b/7dc16cafb1d142519d4150f2c34a5d1c/FLAGb04628cd6 [2024-10-23 23:47:26,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48b17835b/7dc16cafb1d142519d4150f2c34a5d1c [2024-10-23 23:47:26,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-23 23:47:26,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-23 23:47:26,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-23 23:47:26,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-23 23:47:26,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-23 23:47:26,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@165df6ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26, skipping insertion in model container [2024-10-23 23:47:26,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,491 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-23 23:47:26,713 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2024-10-23 23:47:26,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 23:47:26,725 INFO L200 MainTranslator]: Completed pre-run [2024-10-23 23:47:26,753 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2024-10-23 23:47:26,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-23 23:47:26,781 INFO L204 MainTranslator]: Completed translation [2024-10-23 23:47:26,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26 WrapperNode [2024-10-23 23:47:26,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-23 23:47:26,784 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-23 23:47:26,785 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-23 23:47:26,785 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-23 23:47:26,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,799 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,816 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2024-10-23 23:47:26,817 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-23 23:47:26,817 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-23 23:47:26,817 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-23 23:47:26,818 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-23 23:47:26,824 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,824 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,827 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,839 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 5, 6]. 46 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 4 writes are split as follows [0, 1, 3]. [2024-10-23 23:47:26,839 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,839 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,844 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,848 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,855 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-23 23:47:26,856 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-23 23:47:26,856 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-23 23:47:26,856 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-23 23:47:26,856 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (1/1) ... [2024-10-23 23:47:26,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-23 23:47:26,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:26,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-23 23:47:26,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-23 23:47:26,910 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-10-23 23:47:26,911 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2024-10-23 23:47:26,911 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-23 23:47:26,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-10-23 23:47:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-10-23 23:47:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-10-23 23:47:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-23 23:47:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-23 23:47:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-23 23:47:26,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-23 23:47:26,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-23 23:47:27,003 INFO L238 CfgBuilder]: Building ICFG [2024-10-23 23:47:27,005 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-23 23:47:27,020 INFO L733 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-10-23 23:47:27,163 INFO L? ?]: Removed 47 outVars from TransFormulas that were not future-live. [2024-10-23 23:47:27,163 INFO L287 CfgBuilder]: Performing block encoding [2024-10-23 23:47:27,184 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-23 23:47:27,184 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-23 23:47:27,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:47:27 BoogieIcfgContainer [2024-10-23 23:47:27,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-23 23:47:27,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-23 23:47:27,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-23 23:47:27,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-23 23:47:27,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 11:47:26" (1/3) ... [2024-10-23 23:47:27,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c778987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:47:27, skipping insertion in model container [2024-10-23 23:47:27,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 11:47:26" (2/3) ... [2024-10-23 23:47:27,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c778987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 11:47:27, skipping insertion in model container [2024-10-23 23:47:27,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 11:47:27" (3/3) ... [2024-10-23 23:47:27,191 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2024-10-23 23:47:27,202 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-23 23:47:27,202 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-23 23:47:27,239 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-23 23:47:27,244 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;@253d80a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-23 23:47:27,244 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-23 23:47:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 32 states have (on average 1.5625) internal successors, (50), 34 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:47:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-23 23:47:27,252 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:27,252 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:47:27,253 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:27,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:27,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2097342563, now seen corresponding path program 1 times [2024-10-23 23:47:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125270524] [2024-10-23 23:47:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:27,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:27,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:27,403 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-23 23:47:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 23:47:27,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:27,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125270524] [2024-10-23 23:47:27,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125270524] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:47:27,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:47:27,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-23 23:47:27,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468272342] [2024-10-23 23:47:27,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:47:27,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-23 23:47:27,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-23 23:47:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 23:47:27,434 INFO L87 Difference]: Start difference. First operand has 40 states, 32 states have (on average 1.5625) internal successors, (50), 34 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 23:47:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:27,457 INFO L93 Difference]: Finished difference Result 78 states and 116 transitions. [2024-10-23 23:47:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-23 23:47:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-10-23 23:47:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:27,464 INFO L225 Difference]: With dead ends: 78 [2024-10-23 23:47:27,464 INFO L226 Difference]: Without dead ends: 32 [2024-10-23 23:47:27,466 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-23 23:47:27,468 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:27,469 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:47:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-23 23:47:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-23 23:47:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:47:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2024-10-23 23:47:27,493 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2024-10-23 23:47:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:27,494 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2024-10-23 23:47:27,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 23:47:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2024-10-23 23:47:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-23 23:47:27,495 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:27,495 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] [2024-10-23 23:47:27,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-23 23:47:27,496 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:27,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:27,496 INFO L85 PathProgramCache]: Analyzing trace with hash -594563149, now seen corresponding path program 1 times [2024-10-23 23:47:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:27,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774173040] [2024-10-23 23:47:27,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:27,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:27,721 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:27,819 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-10-23 23:47:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 23:47:27,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:27,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774173040] [2024-10-23 23:47:27,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774173040] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:27,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926042480] [2024-10-23 23:47:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:27,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:27,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:27,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:47:27,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-23 23:47:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:27,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-23 23:47:27,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:47:28,007 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 23:47:28,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926042480] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:47:28,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 23:47:28,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2024-10-23 23:47:28,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503095258] [2024-10-23 23:47:28,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:47:28,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 23:47:28,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:28,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 23:47:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-23 23:47:28,011 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 23:47:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:28,073 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2024-10-23 23:47:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-23 23:47:28,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-10-23 23:47:28,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:28,075 INFO L225 Difference]: With dead ends: 59 [2024-10-23 23:47:28,075 INFO L226 Difference]: Without dead ends: 34 [2024-10-23 23:47:28,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-10-23 23:47:28,076 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:28,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 156 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:47:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-10-23 23:47:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-10-23 23:47:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:47:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-10-23 23:47:28,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 26 [2024-10-23 23:47:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:28,083 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-10-23 23:47:28,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 23:47:28,084 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-10-23 23:47:28,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-23 23:47:28,085 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:28,085 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] [2024-10-23 23:47:28,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-23 23:47:28,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:28,290 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:28,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash 219365868, now seen corresponding path program 1 times [2024-10-23 23:47:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:28,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895597035] [2024-10-23 23:47:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:28,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:28,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:28,411 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-23 23:47:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:47:28,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:28,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895597035] [2024-10-23 23:47:28,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895597035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:47:28,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:47:28,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-23 23:47:28,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296034228] [2024-10-23 23:47:28,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:47:28,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-23 23:47:28,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-23 23:47:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-23 23:47:28,424 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 23:47:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:28,499 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-10-23 23:47:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-23 23:47:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-10-23 23:47:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:28,501 INFO L225 Difference]: With dead ends: 57 [2024-10-23 23:47:28,501 INFO L226 Difference]: Without dead ends: 53 [2024-10-23 23:47:28,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-23 23:47:28,502 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:28,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:47:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-23 23:47:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2024-10-23 23:47:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 23:47:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2024-10-23 23:47:28,507 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 30 [2024-10-23 23:47:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:28,507 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2024-10-23 23:47:28,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-23 23:47:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2024-10-23 23:47:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-23 23:47:28,508 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:28,508 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] [2024-10-23 23:47:28,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-23 23:47:28,509 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:28,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1789025124, now seen corresponding path program 1 times [2024-10-23 23:47:28,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:28,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298391778] [2024-10-23 23:47:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:28,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:28,613 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:28,662 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-10-23 23:47:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 23:47:28,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:28,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298391778] [2024-10-23 23:47:28,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298391778] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:28,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786824705] [2024-10-23 23:47:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:28,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:28,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:28,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:47:28,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-23 23:47:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:28,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-23 23:47:28,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-23 23:47:28,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:47:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-23 23:47:28,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786824705] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:47:28,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:47:28,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2024-10-23 23:47:28,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530257866] [2024-10-23 23:47:28,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:47:28,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-23 23:47:28,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:28,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-23 23:47:28,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-10-23 23:47:28,967 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:47:29,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:29,156 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2024-10-23 23:47:29,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-23 23:47:29,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2024-10-23 23:47:29,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:29,159 INFO L225 Difference]: With dead ends: 104 [2024-10-23 23:47:29,161 INFO L226 Difference]: Without dead ends: 67 [2024-10-23 23:47:29,161 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-10-23 23:47:29,162 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:29,163 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 329 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:47:29,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-10-23 23:47:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-10-23 23:47:29,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 23:47:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-10-23 23:47:29,173 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 31 [2024-10-23 23:47:29,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:29,174 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-10-23 23:47:29,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.75) internal successors, (45), 13 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:47:29,174 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-10-23 23:47:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-23 23:47:29,175 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:29,175 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] [2024-10-23 23:47:29,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-23 23:47:29,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-10-23 23:47:29,377 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:29,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:29,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1014395389, now seen corresponding path program 2 times [2024-10-23 23:47:29,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:29,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831818818] [2024-10-23 23:47:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:29,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:29,544 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:29,548 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:47:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:47:29,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:29,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831818818] [2024-10-23 23:47:29,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831818818] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:29,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384921547] [2024-10-23 23:47:29,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 23:47:29,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:29,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:29,560 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:47:29,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-23 23:47:29,637 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 23:47:29,637 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:47:29,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-23 23:47:29,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:29,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 23:47:29,821 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 20 treesize of output 12 [2024-10-23 23:47:29,839 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 8 [2024-10-23 23:47:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:47:29,841 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:47:29,862 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 25 treesize of output 17 [2024-10-23 23:47:29,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-23 23:47:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:47:29,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384921547] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:47:29,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:47:29,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 13 [2024-10-23 23:47:29,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122209680] [2024-10-23 23:47:29,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:47:29,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-23 23:47:29,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:29,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-23 23:47:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-10-23 23:47:29,889 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:47:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:30,038 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2024-10-23 23:47:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-23 23:47:30,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2024-10-23 23:47:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:30,040 INFO L225 Difference]: With dead ends: 78 [2024-10-23 23:47:30,041 INFO L226 Difference]: Without dead ends: 74 [2024-10-23 23:47:30,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-10-23 23:47:30,041 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 38 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:30,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 262 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:47:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-23 23:47:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2024-10-23 23:47:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 53 states have internal predecessors, (65), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-23 23:47:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2024-10-23 23:47:30,050 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 35 [2024-10-23 23:47:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:30,051 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2024-10-23 23:47:30,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:47:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2024-10-23 23:47:30,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-23 23:47:30,052 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:30,052 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:47:30,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-23 23:47:30,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:30,257 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:30,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1380918427, now seen corresponding path program 3 times [2024-10-23 23:47:30,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:30,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131021929] [2024-10-23 23:47:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:30,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:30,471 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:30,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:47:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 23:47:30,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:30,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131021929] [2024-10-23 23:47:30,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131021929] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:30,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771046806] [2024-10-23 23:47:30,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 23:47:30,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:30,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:30,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:47:30,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-23 23:47:30,623 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-23 23:47:30,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:47:30,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-23 23:47:30,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-23 23:47:30,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:47:30,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 23:47:30,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771046806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:47:30,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:47:30,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 14] total 24 [2024-10-23 23:47:30,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131058076] [2024-10-23 23:47:30,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:47:30,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-23 23:47:30,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-23 23:47:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-10-23 23:47:30,877 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:47:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:31,107 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2024-10-23 23:47:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-23 23:47:31,109 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-10-23 23:47:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:31,110 INFO L225 Difference]: With dead ends: 164 [2024-10-23 23:47:31,110 INFO L226 Difference]: Without dead ends: 160 [2024-10-23 23:47:31,110 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-10-23 23:47:31,112 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 96 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:31,113 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 439 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 23:47:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-23 23:47:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 113. [2024-10-23 23:47:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 99 states have (on average 1.2727272727272727) internal successors, (126), 102 states have internal predecessors, (126), 9 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2024-10-23 23:47:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2024-10-23 23:47:31,127 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 36 [2024-10-23 23:47:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:31,127 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2024-10-23 23:47:31,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:47:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2024-10-23 23:47:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-10-23 23:47:31,128 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:31,128 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:47:31,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-23 23:47:31,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:31,333 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:31,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:31,333 INFO L85 PathProgramCache]: Analyzing trace with hash 141769283, now seen corresponding path program 4 times [2024-10-23 23:47:31,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:31,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698353951] [2024-10-23 23:47:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:31,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:31,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:31,688 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:47:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:47:31,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:31,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698353951] [2024-10-23 23:47:31,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698353951] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:31,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144240471] [2024-10-23 23:47:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 23:47:31,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:31,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:47:31,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-23 23:47:31,775 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 23:47:31,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:47:31,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-10-23 23:47:31,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:31,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-23 23:47:31,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-23 23:47:31,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-23 23:47:31,860 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-23 23:47:31,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-23 23:47:31,894 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 23 treesize of output 22 [2024-10-23 23:47:31,900 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 27 treesize of output 15 [2024-10-23 23:47:32,127 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 65 treesize of output 41 [2024-10-23 23:47:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-23 23:47:32,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:47:32,232 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 72 treesize of output 52 [2024-10-23 23:47:32,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 36 [2024-10-23 23:47:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:47:56,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144240471] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:47:56,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:47:56,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2024-10-23 23:47:56,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868732911] [2024-10-23 23:47:56,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:47:56,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-23 23:47:56,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-23 23:47:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=399, Unknown=6, NotChecked=0, Total=462 [2024-10-23 23:47:56,649 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:47:57,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:57,099 INFO L93 Difference]: Finished difference Result 175 states and 231 transitions. [2024-10-23 23:47:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 23:47:57,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-10-23 23:47:57,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:57,101 INFO L225 Difference]: With dead ends: 175 [2024-10-23 23:47:57,101 INFO L226 Difference]: Without dead ends: 166 [2024-10-23 23:47:57,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=85, Invalid=559, Unknown=6, NotChecked=0, Total=650 [2024-10-23 23:47:57,102 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 52 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:57,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 434 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 23:47:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-10-23 23:47:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 146. [2024-10-23 23:47:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 126 states have (on average 1.2698412698412698) internal successors, (160), 132 states have internal predecessors, (160), 13 states have call successors, (13), 3 states have call predecessors, (13), 6 states have return successors, (26), 10 states have call predecessors, (26), 13 states have call successors, (26) [2024-10-23 23:47:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2024-10-23 23:47:57,134 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 37 [2024-10-23 23:47:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:57,134 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2024-10-23 23:47:57,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:47:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2024-10-23 23:47:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 23:47:57,137 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:57,137 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:47:57,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-23 23:47:57,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:57,338 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:57,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1235825357, now seen corresponding path program 1 times [2024-10-23 23:47:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575377763] [2024-10-23 23:47:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:57,419 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:57,455 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:47:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:47:57,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:57,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575377763] [2024-10-23 23:47:57,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575377763] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:57,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747601280] [2024-10-23 23:47:57,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:57,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:57,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:57,539 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) [2024-10-23 23:47:57,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-23 23:47:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:57,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-23 23:47:57,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:47:57,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:47:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:47:58,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747601280] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:47:58,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:47:58,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-10-23 23:47:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789939125] [2024-10-23 23:47:58,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:47:58,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-23 23:47:58,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-23 23:47:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-10-23 23:47:58,117 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 23:47:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:58,551 INFO L93 Difference]: Finished difference Result 285 states and 402 transitions. [2024-10-23 23:47:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 23:47:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2024-10-23 23:47:58,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:58,553 INFO L225 Difference]: With dead ends: 285 [2024-10-23 23:47:58,553 INFO L226 Difference]: Without dead ends: 212 [2024-10-23 23:47:58,554 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2024-10-23 23:47:58,554 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 105 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:58,555 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 403 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 23:47:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-10-23 23:47:58,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2024-10-23 23:47:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 144 states have (on average 1.3055555555555556) internal successors, (188), 152 states have internal predecessors, (188), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 10 states have call predecessors, (32), 13 states have call successors, (32) [2024-10-23 23:47:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 233 transitions. [2024-10-23 23:47:58,575 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 233 transitions. Word has length 39 [2024-10-23 23:47:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:58,576 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 233 transitions. [2024-10-23 23:47:58,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 22 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-23 23:47:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 233 transitions. [2024-10-23 23:47:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 23:47:58,579 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:58,579 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-10-23 23:47:58,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-23 23:47:58,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:58,781 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:58,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash 649019343, now seen corresponding path program 1 times [2024-10-23 23:47:58,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:58,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061100886] [2024-10-23 23:47:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:58,844 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:58,847 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:47:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:47:58,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061100886] [2024-10-23 23:47:58,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061100886] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:58,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31014544] [2024-10-23 23:47:58,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:58,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:58,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:58,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:47:58,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-23 23:47:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:59,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-23 23:47:59,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:47:59,123 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 23:47:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31014544] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:47:59,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 23:47:59,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 15 [2024-10-23 23:47:59,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703301691] [2024-10-23 23:47:59,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:47:59,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-23 23:47:59,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:59,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-23 23:47:59,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-23 23:47:59,125 INFO L87 Difference]: Start difference. First operand 167 states and 233 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 23:47:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:47:59,202 INFO L93 Difference]: Finished difference Result 197 states and 277 transitions. [2024-10-23 23:47:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-23 23:47:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-10-23 23:47:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:47:59,204 INFO L225 Difference]: With dead ends: 197 [2024-10-23 23:47:59,204 INFO L226 Difference]: Without dead ends: 185 [2024-10-23 23:47:59,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-10-23 23:47:59,205 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:47:59,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 211 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:47:59,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-10-23 23:47:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 171. [2024-10-23 23:47:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 148 states have (on average 1.2972972972972974) internal successors, (192), 154 states have internal predecessors, (192), 13 states have call successors, (13), 4 states have call predecessors, (13), 9 states have return successors, (32), 12 states have call predecessors, (32), 13 states have call successors, (32) [2024-10-23 23:47:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 237 transitions. [2024-10-23 23:47:59,220 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 237 transitions. Word has length 39 [2024-10-23 23:47:59,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:47:59,221 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 237 transitions. [2024-10-23 23:47:59,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-23 23:47:59,221 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 237 transitions. [2024-10-23 23:47:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-23 23:47:59,222 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:47:59,222 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:47:59,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-23 23:47:59,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:59,425 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:47:59,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:47:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash -628111627, now seen corresponding path program 2 times [2024-10-23 23:47:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:47:59,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810744271] [2024-10-23 23:47:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:47:59,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:47:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:59,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:47:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:59,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-23 23:47:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:47:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 23:47:59,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:47:59,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810744271] [2024-10-23 23:47:59,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810744271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:47:59,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423929926] [2024-10-23 23:47:59,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 23:47:59,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:47:59,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:47:59,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:47:59,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-23 23:47:59,639 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 23:47:59,639 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:47:59,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-23 23:47:59,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:47:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:47:59,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:47:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-23 23:47:59,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423929926] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:47:59,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:47:59,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-10-23 23:47:59,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232774046] [2024-10-23 23:47:59,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:47:59,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-23 23:47:59,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:47:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-23 23:47:59,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-10-23 23:47:59,836 INFO L87 Difference]: Start difference. First operand 171 states and 237 transitions. Second operand has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:00,044 INFO L93 Difference]: Finished difference Result 240 states and 333 transitions. [2024-10-23 23:48:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-23 23:48:00,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2024-10-23 23:48:00,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:00,046 INFO L225 Difference]: With dead ends: 240 [2024-10-23 23:48:00,046 INFO L226 Difference]: Without dead ends: 170 [2024-10-23 23:48:00,047 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-10-23 23:48:00,047 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:00,048 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 362 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:48:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-10-23 23:48:00,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2024-10-23 23:48:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 141 states have (on average 1.297872340425532) internal successors, (183), 147 states have internal predecessors, (183), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2024-10-23 23:48:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 224 transitions. [2024-10-23 23:48:00,069 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 224 transitions. Word has length 39 [2024-10-23 23:48:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:00,069 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 224 transitions. [2024-10-23 23:48:00,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.230769230769231) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 224 transitions. [2024-10-23 23:48:00,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-23 23:48:00,070 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:00,071 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:00,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-23 23:48:00,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-23 23:48:00,271 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:00,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2129541738, now seen corresponding path program 5 times [2024-10-23 23:48:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:00,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86101378] [2024-10-23 23:48:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:00,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:00,370 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:00,406 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-10-23 23:48:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 23:48:00,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:00,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86101378] [2024-10-23 23:48:00,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86101378] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:00,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769306775] [2024-10-23 23:48:00,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 23:48:00,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:00,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:00,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:00,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-23 23:48:00,506 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-23 23:48:00,506 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:00,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-23 23:48:00,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:48:00,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 23:48:00,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769306775] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:00,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:00,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2024-10-23 23:48:00,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106886639] [2024-10-23 23:48:00,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:00,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-23 23:48:00,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-23 23:48:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-10-23 23:48:00,687 INFO L87 Difference]: Start difference. First operand 163 states and 224 transitions. Second operand has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:00,860 INFO L93 Difference]: Finished difference Result 258 states and 358 transitions. [2024-10-23 23:48:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-23 23:48:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2024-10-23 23:48:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:00,862 INFO L225 Difference]: With dead ends: 258 [2024-10-23 23:48:00,862 INFO L226 Difference]: Without dead ends: 159 [2024-10-23 23:48:00,862 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-23 23:48:00,863 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:00,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 406 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:48:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-10-23 23:48:00,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 146. [2024-10-23 23:48:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.2834645669291338) internal successors, (163), 131 states have internal predecessors, (163), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2024-10-23 23:48:00,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2024-10-23 23:48:00,873 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 41 [2024-10-23 23:48:00,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:00,873 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2024-10-23 23:48:00,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.076923076923077) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:00,873 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2024-10-23 23:48:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-23 23:48:00,874 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:00,874 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:00,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-10-23 23:48:01,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:01,078 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:01,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1890606574, now seen corresponding path program 3 times [2024-10-23 23:48:01,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:01,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722980641] [2024-10-23 23:48:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:01,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:01,356 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:01,359 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 23:48:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:48:01,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722980641] [2024-10-23 23:48:01,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722980641] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:01,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425596521] [2024-10-23 23:48:01,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 23:48:01,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:01,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:01,365 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:01,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-23 23:48:01,460 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-23 23:48:01,460 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:01,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-10-23 23:48:01,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:01,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-23 23:48:01,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 23:48:01,499 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-23 23:48:01,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-23 23:48:01,537 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 32 treesize of output 20 [2024-10-23 23:48:01,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 23:48:01,726 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 48 treesize of output 28 [2024-10-23 23:48:01,756 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 24 treesize of output 16 [2024-10-23 23:48:01,788 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-23 23:48:01,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2024-10-23 23:48:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:48:01,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:01,808 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 41 treesize of output 29 [2024-10-23 23:48:01,810 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 33 treesize of output 21 [2024-10-23 23:48:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:48:01,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425596521] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:01,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:01,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 21 [2024-10-23 23:48:01,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841766724] [2024-10-23 23:48:01,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:01,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-23 23:48:01,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:01,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-23 23:48:01,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-10-23 23:48:01,935 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:48:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:02,341 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2024-10-23 23:48:02,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-23 23:48:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-10-23 23:48:02,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:02,343 INFO L225 Difference]: With dead ends: 165 [2024-10-23 23:48:02,343 INFO L226 Difference]: Without dead ends: 161 [2024-10-23 23:48:02,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2024-10-23 23:48:02,344 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:02,344 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 635 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 23:48:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-10-23 23:48:02,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2024-10-23 23:48:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 128 states have (on average 1.28125) internal successors, (164), 132 states have internal predecessors, (164), 10 states have call successors, (10), 4 states have call predecessors, (10), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2024-10-23 23:48:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 196 transitions. [2024-10-23 23:48:02,354 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 196 transitions. Word has length 43 [2024-10-23 23:48:02,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:02,354 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 196 transitions. [2024-10-23 23:48:02,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-23 23:48:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 196 transitions. [2024-10-23 23:48:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-23 23:48:02,355 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:02,355 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:02,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-23 23:48:02,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-23 23:48:02,559 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:02,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1520170790, now seen corresponding path program 4 times [2024-10-23 23:48:02,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:02,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414865697] [2024-10-23 23:48:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:02,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:02,756 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:02,846 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 23:48:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-23 23:48:02,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:02,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414865697] [2024-10-23 23:48:02,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414865697] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:02,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143608538] [2024-10-23 23:48:02,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 23:48:02,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:02,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:02,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:02,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-23 23:48:02,997 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 23:48:02,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:02,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-23 23:48:03,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-10-23 23:48:03,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-23 23:48:03,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143608538] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:03,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:03,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 33 [2024-10-23 23:48:03,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974813456] [2024-10-23 23:48:03,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:03,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-23 23:48:03,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-23 23:48:03,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2024-10-23 23:48:03,525 INFO L87 Difference]: Start difference. First operand 147 states and 196 transitions. Second operand has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:04,145 INFO L93 Difference]: Finished difference Result 265 states and 376 transitions. [2024-10-23 23:48:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-23 23:48:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-10-23 23:48:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:04,147 INFO L225 Difference]: With dead ends: 265 [2024-10-23 23:48:04,147 INFO L226 Difference]: Without dead ends: 261 [2024-10-23 23:48:04,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2024-10-23 23:48:04,148 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 86 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:04,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1146 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-23 23:48:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-10-23 23:48:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 195. [2024-10-23 23:48:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 171 states have (on average 1.263157894736842) internal successors, (216), 176 states have internal predecessors, (216), 14 states have call successors, (14), 4 states have call predecessors, (14), 9 states have return successors, (25), 14 states have call predecessors, (25), 14 states have call successors, (25) [2024-10-23 23:48:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 255 transitions. [2024-10-23 23:48:04,171 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 255 transitions. Word has length 44 [2024-10-23 23:48:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:04,171 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 255 transitions. [2024-10-23 23:48:04,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 30 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 255 transitions. [2024-10-23 23:48:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-23 23:48:04,172 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:04,172 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:04,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-23 23:48:04,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-23 23:48:04,374 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:04,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:04,375 INFO L85 PathProgramCache]: Analyzing trace with hash 119913326, now seen corresponding path program 5 times [2024-10-23 23:48:04,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:04,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497232225] [2024-10-23 23:48:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:04,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:05,117 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:05,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-23 23:48:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:48:05,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:05,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497232225] [2024-10-23 23:48:05,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497232225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:05,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37127773] [2024-10-23 23:48:05,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-23 23:48:05,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:05,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:05,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-23 23:48:05,234 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-10-23 23:48:05,234 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:05,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-23 23:48:05,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:05,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-23 23:48:05,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-23 23:48:05,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-23 23:48:05,292 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-23 23:48:05,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-23 23:48:05,369 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 27 treesize of output 15 [2024-10-23 23:48:05,379 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 23 treesize of output 22 [2024-10-23 23:48:05,451 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-10-23 23:48:05,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-10-23 23:48:05,523 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-10-23 23:48:05,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 44 [2024-10-23 23:48:05,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-10-23 23:48:05,902 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 116 treesize of output 80 [2024-10-23 23:48:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-23 23:48:10,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:10,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 100 [2024-10-23 23:48:10,248 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 104 treesize of output 68 [2024-10-23 23:48:14,351 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (= (select (let ((.cse0 (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0)))) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (= (let ((.cse1 (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse1 (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0))))) is different from false [2024-10-23 23:48:19,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 23:48:19,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9788 treesize of output 8772 [2024-10-23 23:48:19,457 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-23 23:48:19,459 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 2238 treesize of output 2110 [2024-10-23 23:48:19,467 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-23 23:48:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2024-10-23 23:48:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37127773] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:20,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:20,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2024-10-23 23:48:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174493300] [2024-10-23 23:48:20,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:20,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-23 23:48:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:20,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-23 23:48:20,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1034, Unknown=3, NotChecked=64, Total=1190 [2024-10-23 23:48:20,220 INFO L87 Difference]: Start difference. First operand 195 states and 255 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 23:48:24,378 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 0))) (and (= (select (select |c_#memory_$Pointer$#2.offset| .cse0) 0) 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (= (select (let ((.cse1 (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0)))) (= (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 0) 0) (= (select |c_#valid| .cse0) 1) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| Int)) (or (= (let ((.cse2 (store |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (select (select .cse2 (select (select (store |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57| (store (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (select (select .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) 0) (not (= (select |c_#valid| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_57|) 0)))) (not (= .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= (select (select |c_#memory_$Pointer$#2.base| .cse0) 0) 0) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0))) is different from false [2024-10-23 23:48:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:25,095 INFO L93 Difference]: Finished difference Result 261 states and 337 transitions. [2024-10-23 23:48:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-23 23:48:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2024-10-23 23:48:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:25,097 INFO L225 Difference]: With dead ends: 261 [2024-10-23 23:48:25,097 INFO L226 Difference]: Without dead ends: 251 [2024-10-23 23:48:25,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=126, Invalid=1284, Unknown=4, NotChecked=146, Total=1560 [2024-10-23 23:48:25,098 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 67 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:25,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1145 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 790 Invalid, 0 Unknown, 152 Unchecked, 0.7s Time] [2024-10-23 23:48:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-10-23 23:48:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2024-10-23 23:48:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 201 states have (on average 1.2587064676616915) internal successors, (253), 208 states have internal predecessors, (253), 18 states have call successors, (18), 5 states have call predecessors, (18), 11 states have return successors, (33), 17 states have call predecessors, (33), 18 states have call successors, (33) [2024-10-23 23:48:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2024-10-23 23:48:25,114 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 45 [2024-10-23 23:48:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:25,115 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2024-10-23 23:48:25,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 23:48:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2024-10-23 23:48:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-23 23:48:25,116 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:25,116 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:25,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-23 23:48:25,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-23 23:48:25,317 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:25,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1285973098, now seen corresponding path program 6 times [2024-10-23 23:48:25,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:25,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015002599] [2024-10-23 23:48:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:25,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:25,447 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:25,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-10-23 23:48:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 23:48:25,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:25,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015002599] [2024-10-23 23:48:25,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015002599] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:25,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232871058] [2024-10-23 23:48:25,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-23 23:48:25,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:25,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:25,519 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:25,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-23 23:48:25,617 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-10-23 23:48:25,617 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:25,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-23 23:48:25,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-23 23:48:25,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-23 23:48:25,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232871058] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:25,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:25,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 22 [2024-10-23 23:48:25,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048248123] [2024-10-23 23:48:25,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:25,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-23 23:48:25,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:25,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-23 23:48:25,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2024-10-23 23:48:25,863 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand has 22 states, 19 states have (on average 3.736842105263158) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:26,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:26,157 INFO L93 Difference]: Finished difference Result 303 states and 410 transitions. [2024-10-23 23:48:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-23 23:48:26,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.736842105263158) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2024-10-23 23:48:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:26,159 INFO L225 Difference]: With dead ends: 303 [2024-10-23 23:48:26,159 INFO L226 Difference]: Without dead ends: 246 [2024-10-23 23:48:26,159 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2024-10-23 23:48:26,160 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 22 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:26,160 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 470 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-23 23:48:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-10-23 23:48:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 222. [2024-10-23 23:48:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 193 states have (on average 1.2590673575129534) internal successors, (243), 200 states have internal predecessors, (243), 17 states have call successors, (17), 5 states have call predecessors, (17), 11 states have return successors, (31), 16 states have call predecessors, (31), 17 states have call successors, (31) [2024-10-23 23:48:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 291 transitions. [2024-10-23 23:48:26,176 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 291 transitions. Word has length 47 [2024-10-23 23:48:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:26,176 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 291 transitions. [2024-10-23 23:48:26,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.736842105263158) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 291 transitions. [2024-10-23 23:48:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-10-23 23:48:26,177 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:26,177 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:26,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-23 23:48:26,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-23 23:48:26,378 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:26,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1353750673, now seen corresponding path program 1 times [2024-10-23 23:48:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:26,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691541624] [2024-10-23 23:48:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:26,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:26,432 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:26,434 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:48:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:26,465 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-10-23 23:48:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-23 23:48:26,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:26,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691541624] [2024-10-23 23:48:26,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691541624] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569523605] [2024-10-23 23:48:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:26,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:26,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:26,471 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:26,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-23 23:48:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:26,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-23 23:48:26,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 23:48:26,611 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-23 23:48:26,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569523605] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:48:26,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-23 23:48:26,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-23 23:48:26,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336815183] [2024-10-23 23:48:26,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:48:26,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-23 23:48:26,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-23 23:48:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-23 23:48:26,612 INFO L87 Difference]: Start difference. First operand 222 states and 291 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 23:48:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:26,674 INFO L93 Difference]: Finished difference Result 301 states and 392 transitions. [2024-10-23 23:48:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 23:48:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2024-10-23 23:48:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:26,675 INFO L225 Difference]: With dead ends: 301 [2024-10-23 23:48:26,675 INFO L226 Difference]: Without dead ends: 171 [2024-10-23 23:48:26,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-10-23 23:48:26,676 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:26,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 135 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:48:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-10-23 23:48:26,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2024-10-23 23:48:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 147 states have internal predecessors, (174), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (17), 10 states have call predecessors, (17), 10 states have call successors, (17) [2024-10-23 23:48:26,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 201 transitions. [2024-10-23 23:48:26,690 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 201 transitions. Word has length 50 [2024-10-23 23:48:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:26,691 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 201 transitions. [2024-10-23 23:48:26,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-23 23:48:26,691 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 201 transitions. [2024-10-23 23:48:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-10-23 23:48:26,692 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:26,692 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:26,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-23 23:48:26,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:26,892 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:26,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash -538086489, now seen corresponding path program 7 times [2024-10-23 23:48:26,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:26,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455012289] [2024-10-23 23:48:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:26,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:27,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:27,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-10-23 23:48:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-23 23:48:27,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455012289] [2024-10-23 23:48:27,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455012289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:27,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252816426] [2024-10-23 23:48:27,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-23 23:48:27,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:27,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:27,067 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:27,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-23 23:48:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:27,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-23 23:48:27,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-23 23:48:27,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-23 23:48:27,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252816426] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:27,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:27,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 19 [2024-10-23 23:48:27,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331160794] [2024-10-23 23:48:27,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:27,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-23 23:48:27,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:27,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-23 23:48:27,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-23 23:48:27,374 INFO L87 Difference]: Start difference. First operand 163 states and 201 transitions. Second operand has 19 states, 16 states have (on average 4.125) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:27,537 INFO L93 Difference]: Finished difference Result 239 states and 304 transitions. [2024-10-23 23:48:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-23 23:48:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.125) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2024-10-23 23:48:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:27,538 INFO L225 Difference]: With dead ends: 239 [2024-10-23 23:48:27,538 INFO L226 Difference]: Without dead ends: 179 [2024-10-23 23:48:27,539 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-10-23 23:48:27,539 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:27,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 330 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:48:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-10-23 23:48:27,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 153. [2024-10-23 23:48:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 138 states have internal predecessors, (163), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-10-23 23:48:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 187 transitions. [2024-10-23 23:48:27,552 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 187 transitions. Word has length 49 [2024-10-23 23:48:27,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:27,552 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 187 transitions. [2024-10-23 23:48:27,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.125) internal successors, (66), 18 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2024-10-23 23:48:27,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-23 23:48:27,553 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:27,553 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:27,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-23 23:48:27,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-23 23:48:27,754 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:27,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1012795119, now seen corresponding path program 8 times [2024-10-23 23:48:27,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:27,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981825297] [2024-10-23 23:48:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:27,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:28,280 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:28,283 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-23 23:48:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-23 23:48:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981825297] [2024-10-23 23:48:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981825297] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:28,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103851512] [2024-10-23 23:48:28,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-23 23:48:28,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:28,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:28,298 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:28,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-23 23:48:28,407 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-23 23:48:28,407 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:28,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-10-23 23:48:28,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:28,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 23:48:28,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-23 23:48:28,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-23 23:48:28,525 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-10-23 23:48:28,525 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 1 case distinctions, treesize of input 28 treesize of output 24 [2024-10-23 23:48:28,572 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-23 23:48:28,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-23 23:48:28,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-10-23 23:48:28,628 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-10-23 23:48:28,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 30 [2024-10-23 23:48:28,911 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 82 treesize of output 54 [2024-10-23 23:48:29,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-10-23 23:48:29,089 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2024-10-23 23:48:29,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2024-10-23 23:48:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 23:48:29,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:29,187 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 104 treesize of output 76 [2024-10-23 23:48:29,188 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 80 treesize of output 52 [2024-10-23 23:48:33,448 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-23 23:48:33,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2024-10-23 23:48:33,531 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-23 23:48:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-23 23:48:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103851512] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:33,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:33,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 33 [2024-10-23 23:48:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687066055] [2024-10-23 23:48:33,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:33,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-23 23:48:33,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-23 23:48:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=950, Unknown=1, NotChecked=0, Total=1056 [2024-10-23 23:48:33,546 INFO L87 Difference]: Start difference. First operand 153 states and 187 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 23:48:37,645 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 [1] [2024-10-23 23:48:41,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-23 23:48:45,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-23 23:48:49,920 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 [1] [2024-10-23 23:48:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:50,926 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2024-10-23 23:48:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-23 23:48:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2024-10-23 23:48:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:50,928 INFO L225 Difference]: With dead ends: 172 [2024-10-23 23:48:50,928 INFO L226 Difference]: Without dead ends: 168 [2024-10-23 23:48:50,928 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=269, Invalid=1892, Unknown=1, NotChecked=0, Total=2162 [2024-10-23 23:48:50,929 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 36 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:50,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 908 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 673 Invalid, 4 Unknown, 0 Unchecked, 16.9s Time] [2024-10-23 23:48:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-10-23 23:48:50,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2024-10-23 23:48:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 134 states have (on average 1.2238805970149254) internal successors, (164), 139 states have internal predecessors, (164), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2024-10-23 23:48:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 188 transitions. [2024-10-23 23:48:50,943 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 188 transitions. Word has length 51 [2024-10-23 23:48:50,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:50,944 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 188 transitions. [2024-10-23 23:48:50,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-23 23:48:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 188 transitions. [2024-10-23 23:48:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-23 23:48:50,944 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:50,944 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:50,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-23 23:48:51,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-23 23:48:51,145 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:51,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:51,146 INFO L85 PathProgramCache]: Analyzing trace with hash 529136507, now seen corresponding path program 1 times [2024-10-23 23:48:51,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:51,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467074695] [2024-10-23 23:48:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:51,231 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:51,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:48:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:51,236 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-23 23:48:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-10-23 23:48:51,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:51,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467074695] [2024-10-23 23:48:51,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467074695] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:48:51,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:48:51,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-23 23:48:51,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216074347] [2024-10-23 23:48:51,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:48:51,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-23 23:48:51,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:51,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-23 23:48:51,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-23 23:48:51,240 INFO L87 Difference]: Start difference. First operand 154 states and 188 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 23:48:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:51,327 INFO L93 Difference]: Finished difference Result 164 states and 198 transitions. [2024-10-23 23:48:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-23 23:48:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-10-23 23:48:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:51,328 INFO L225 Difference]: With dead ends: 164 [2024-10-23 23:48:51,328 INFO L226 Difference]: Without dead ends: 160 [2024-10-23 23:48:51,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-23 23:48:51,329 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:51,329 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 138 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-23 23:48:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-10-23 23:48:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2024-10-23 23:48:51,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 124 states have (on average 1.217741935483871) internal successors, (151), 129 states have internal predecessors, (151), 8 states have call successors, (8), 5 states have call predecessors, (8), 10 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-10-23 23:48:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2024-10-23 23:48:51,344 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 53 [2024-10-23 23:48:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:51,344 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2024-10-23 23:48:51,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 23:48:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2024-10-23 23:48:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-23 23:48:51,346 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:51,346 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:51,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-23 23:48:51,347 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:51,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1331310057, now seen corresponding path program 9 times [2024-10-23 23:48:51,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:51,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166799584] [2024-10-23 23:48:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:51,535 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:51,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-23 23:48:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-23 23:48:51,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:51,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166799584] [2024-10-23 23:48:51,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166799584] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:51,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229786093] [2024-10-23 23:48:51,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-23 23:48:51,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:51,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:51,686 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:51,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-23 23:48:51,793 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-23 23:48:51,793 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:51,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-23 23:48:51,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-23 23:48:52,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-23 23:48:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229786093] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-23 23:48:52,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-23 23:48:52,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 38 [2024-10-23 23:48:52,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789906612] [2024-10-23 23:48:52,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:52,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-23 23:48:52,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:52,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-23 23:48:52,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2024-10-23 23:48:52,347 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 38 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:53,147 INFO L93 Difference]: Finished difference Result 246 states and 314 transitions. [2024-10-23 23:48:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-23 23:48:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2024-10-23 23:48:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:53,149 INFO L225 Difference]: With dead ends: 246 [2024-10-23 23:48:53,149 INFO L226 Difference]: Without dead ends: 242 [2024-10-23 23:48:53,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=2062, Unknown=0, NotChecked=0, Total=2256 [2024-10-23 23:48:53,150 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 100 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:53,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1586 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-23 23:48:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-10-23 23:48:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2024-10-23 23:48:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 152 states have (on average 1.1973684210526316) internal successors, (182), 157 states have internal predecessors, (182), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2024-10-23 23:48:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 208 transitions. [2024-10-23 23:48:53,167 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 208 transitions. Word has length 52 [2024-10-23 23:48:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:53,167 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 208 transitions. [2024-10-23 23:48:53,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.176470588235294) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-10-23 23:48:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 208 transitions. [2024-10-23 23:48:53,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-23 23:48:53,168 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:53,168 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:53,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-23 23:48:53,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:53,369 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:53,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:53,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1456128277, now seen corresponding path program 1 times [2024-10-23 23:48:53,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:53,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061073610] [2024-10-23 23:48:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,400 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:48:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,402 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-23 23:48:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-10-23 23:48:53,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:53,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061073610] [2024-10-23 23:48:53,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061073610] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-23 23:48:53,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-23 23:48:53,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-23 23:48:53,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297259619] [2024-10-23 23:48:53,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-23 23:48:53,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-23 23:48:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:53,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-23 23:48:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:48:53,405 INFO L87 Difference]: Start difference. First operand 173 states and 208 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 23:48:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:53,433 INFO L93 Difference]: Finished difference Result 200 states and 242 transitions. [2024-10-23 23:48:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-23 23:48:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2024-10-23 23:48:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:53,435 INFO L225 Difference]: With dead ends: 200 [2024-10-23 23:48:53,436 INFO L226 Difference]: Without dead ends: 177 [2024-10-23 23:48:53,436 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-23 23:48:53,436 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:53,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-23 23:48:53,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-10-23 23:48:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2024-10-23 23:48:53,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 156 states have (on average 1.1987179487179487) internal successors, (187), 161 states have internal predecessors, (187), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (17), 10 states have call predecessors, (17), 9 states have call successors, (17) [2024-10-23 23:48:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2024-10-23 23:48:53,453 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 54 [2024-10-23 23:48:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:53,454 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2024-10-23 23:48:53,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-10-23 23:48:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2024-10-23 23:48:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-23 23:48:53,454 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:53,455 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:53,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-23 23:48:53,455 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:53,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash -776069907, now seen corresponding path program 1 times [2024-10-23 23:48:53,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:53,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202758807] [2024-10-23 23:48:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:53,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,717 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,719 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-23 23:48:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,722 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-23 23:48:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-23 23:48:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202758807] [2024-10-23 23:48:53,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202758807] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823036458] [2024-10-23 23:48:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:53,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:53,727 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:53,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-23 23:48:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:53,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-23 23:48:53,852 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:53,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-23 23:48:53,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-23 23:48:54,159 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-10-23 23:48:54,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2024-10-23 23:48:54,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2024-10-23 23:48:54,333 INFO L349 Elim1Store]: treesize reduction 16, result has 55.6 percent of original size [2024-10-23 23:48:54,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 51 [2024-10-23 23:48:54,349 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-23 23:48:54,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-10-23 23:48:54,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 23:48:54,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 66 [2024-10-23 23:48:54,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 23:48:54,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 62 [2024-10-23 23:48:54,545 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-23 23:48:54,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2024-10-23 23:48:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-23 23:48:54,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:48:55,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823036458] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:55,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-23 23:48:55,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2024-10-23 23:48:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696793050] [2024-10-23 23:48:55,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-23 23:48:55,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-23 23:48:55,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-23 23:48:55,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-23 23:48:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-10-23 23:48:55,083 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-23 23:48:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-23 23:48:55,673 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2024-10-23 23:48:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-23 23:48:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 54 [2024-10-23 23:48:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-23 23:48:55,675 INFO L225 Difference]: With dead ends: 261 [2024-10-23 23:48:55,675 INFO L226 Difference]: Without dead ends: 257 [2024-10-23 23:48:55,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2024-10-23 23:48:55,676 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 115 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-23 23:48:55,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 507 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-23 23:48:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2024-10-23 23:48:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 194. [2024-10-23 23:48:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 172 states have (on average 1.2093023255813953) internal successors, (208), 177 states have internal predecessors, (208), 10 states have call successors, (10), 5 states have call predecessors, (10), 11 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2024-10-23 23:48:55,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2024-10-23 23:48:55,695 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 54 [2024-10-23 23:48:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-23 23:48:55,695 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2024-10-23 23:48:55,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-10-23 23:48:55,696 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2024-10-23 23:48:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-10-23 23:48:55,696 INFO L207 NwaCegarLoop]: Found error trace [2024-10-23 23:48:55,696 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-23 23:48:55,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-23 23:48:55,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:55,897 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-23 23:48:55,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-23 23:48:55,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1679628753, now seen corresponding path program 10 times [2024-10-23 23:48:55,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-23 23:48:55,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200325467] [2024-10-23 23:48:55,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-23 23:48:55,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-23 23:48:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:57,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-23 23:48:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:57,314 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-23 23:48:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-23 23:48:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-23 23:48:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-23 23:48:57,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200325467] [2024-10-23 23:48:57,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200325467] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-23 23:48:57,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572695955] [2024-10-23 23:48:57,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-23 23:48:57,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-23 23:48:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-23 23:48:57,325 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-23 23:48:57,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-23 23:48:57,447 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-23 23:48:57,448 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-23 23:48:57,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-10-23 23:48:57,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-23 23:48:57,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-23 23:48:57,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-23 23:48:57,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-23 23:48:57,503 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-10-23 23:48:57,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-10-23 23:48:57,564 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 27 treesize of output 15 [2024-10-23 23:48:57,569 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 23 treesize of output 22 [2024-10-23 23:48:57,654 INFO L349 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2024-10-23 23:48:57,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2024-10-23 23:48:57,746 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-10-23 23:48:57,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 49 [2024-10-23 23:48:57,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2024-10-23 23:48:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 23:48:57,870 INFO L349 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2024-10-23 23:48:57,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 37 [2024-10-23 23:48:57,995 INFO L349 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2024-10-23 23:48:57,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 141 treesize of output 69 [2024-10-23 23:48:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-23 23:48:58,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2024-10-23 23:48:58,523 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 183 treesize of output 135 [2024-10-23 23:49:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 42 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-23 23:49:02,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-23 23:49:03,065 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 264 treesize of output 196 [2024-10-23 23:49:03,067 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 200 treesize of output 132