./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 803cd42f 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 ../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-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 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 00:56:03,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 00:56:04,023 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-22 00:56:04,027 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 00:56:04,029 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 00:56:04,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 00:56:04,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 00:56:04,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 00:56:04,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 00:56:04,045 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 00:56:04,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 00:56:04,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 00:56:04,046 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 00:56:04,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 00:56:04,048 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 00:56:04,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 00:56:04,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 00:56:04,048 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 00:56:04,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 00:56:04,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 00:56:04,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 00:56:04,053 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 00:56:04,053 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 00:56:04,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 00:56:04,053 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 00:56:04,054 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 00:56:04,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 00:56:04,054 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 00:56:04,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 00:56:04,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 00:56:04,054 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 00:56:04,055 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 00:56:04,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 00:56:04,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 00:56:04,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 00:56:04,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 00:56:04,055 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 00:56:04,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 00:56:04,056 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 00:56:04,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 00:56:04,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 00:56:04,056 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 00:56:04,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2024-11-22 00:56:04,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 00:56:04,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 00:56:04,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 00:56:04,292 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 00:56:04,293 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 00:56:04,294 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2024-11-22 00:56:05,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 00:56:06,063 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 00:56:06,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2024-11-22 00:56:06,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a29c6ae7/4956eb378296488abc176a912ed245c9/FLAGf44b6762f [2024-11-22 00:56:06,094 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a29c6ae7/4956eb378296488abc176a912ed245c9 [2024-11-22 00:56:06,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 00:56:06,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 00:56:06,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 00:56:06,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 00:56:06,108 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 00:56:06,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198a1152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06, skipping insertion in model container [2024-11-22 00:56:06,111 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,151 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 00:56:06,512 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2024-11-22 00:56:06,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 00:56:06,527 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 00:56:06,571 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2024-11-22 00:56:06,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 00:56:06,602 INFO L204 MainTranslator]: Completed translation [2024-11-22 00:56:06,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06 WrapperNode [2024-11-22 00:56:06,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 00:56:06,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 00:56:06,604 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 00:56:06,604 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 00:56:06,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,643 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 184 [2024-11-22 00:56:06,643 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 00:56:06,644 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 00:56:06,644 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 00:56:06,644 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 00:56:06,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,657 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,679 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 5, 13]. 65 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 6 writes are split as follows [0, 1, 5]. [2024-11-22 00:56:06,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 00:56:06,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 00:56:06,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 00:56:06,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 00:56:06,701 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (1/1) ... [2024-11-22 00:56:06,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 00:56:06,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 00:56:06,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 00:56:06,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 00:56:06,789 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-22 00:56:06,789 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-22 00:56:06,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 00:56:06,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 00:56:06,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 00:56:06,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-22 00:56:06,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-22 00:56:06,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-22 00:56:06,790 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2024-11-22 00:56:06,791 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2024-11-22 00:56:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-22 00:56:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-22 00:56:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-22 00:56:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 00:56:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-22 00:56:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-22 00:56:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-22 00:56:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 00:56:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 00:56:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-22 00:56:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 00:56:06,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 00:56:06,904 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 00:56:06,905 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 00:56:06,936 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-22 00:56:07,113 INFO L? ?]: Removed 57 outVars from TransFormulas that were not future-live. [2024-11-22 00:56:07,114 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 00:56:07,125 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 00:56:07,125 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-22 00:56:07,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:07 BoogieIcfgContainer [2024-11-22 00:56:07,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 00:56:07,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 00:56:07,131 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 00:56:07,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 00:56:07,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:56:06" (1/3) ... [2024-11-22 00:56:07,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6101e062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:56:07, skipping insertion in model container [2024-11-22 00:56:07,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:56:06" (2/3) ... [2024-11-22 00:56:07,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6101e062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:56:07, skipping insertion in model container [2024-11-22 00:56:07,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:56:07" (3/3) ... [2024-11-22 00:56:07,142 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2024-11-22 00:56:07,160 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 00:56:07,161 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-22 00:56:07,210 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 00:56:07,216 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;@354d0dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 00:56:07,217 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-22 00:56:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 46 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-22 00:56:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-22 00:56:07,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:07,227 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:07,228 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:07,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1793365782, now seen corresponding path program 1 times [2024-11-22 00:56:07,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:07,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774563196] [2024-11-22 00:56:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:07,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 00:56:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:07,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774563196] [2024-11-22 00:56:07,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774563196] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 00:56:07,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 00:56:07,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 00:56:07,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063508712] [2024-11-22 00:56:07,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 00:56:07,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-22 00:56:07,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:07,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-22 00:56:07,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 00:56:07,487 INFO L87 Difference]: Start difference. First operand has 51 states, 44 states have (on average 1.6136363636363635) internal successors, (71), 46 states have internal predecessors, (71), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:07,512 INFO L93 Difference]: Finished difference Result 100 states and 154 transitions. [2024-11-22 00:56:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-22 00:56:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-22 00:56:07,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:07,521 INFO L225 Difference]: With dead ends: 100 [2024-11-22 00:56:07,522 INFO L226 Difference]: Without dead ends: 39 [2024-11-22 00:56:07,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-22 00:56:07,529 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:07,530 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 00:56:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-22 00:56:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-22 00:56:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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) [2024-11-22 00:56:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-11-22 00:56:07,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2024-11-22 00:56:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:07,574 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-11-22 00:56:07,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-11-22 00:56:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-22 00:56:07,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:07,576 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:07,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 00:56:07,577 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:07,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1881945610, now seen corresponding path program 1 times [2024-11-22 00:56:07,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:07,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387255819] [2024-11-22 00:56:07,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:07,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 00:56:07,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:07,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387255819] [2024-11-22 00:56:07,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387255819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 00:56:07,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 00:56:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 00:56:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053592676] [2024-11-22 00:56:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 00:56:07,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 00:56:07,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:07,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 00:56:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 00:56:07,727 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:07,762 INFO L93 Difference]: Finished difference Result 76 states and 100 transitions. [2024-11-22 00:56:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 00:56:07,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-22 00:56:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:07,765 INFO L225 Difference]: With dead ends: 76 [2024-11-22 00:56:07,765 INFO L226 Difference]: Without dead ends: 46 [2024-11-22 00:56:07,766 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 00:56:07,768 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:07,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 00:56:07,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-22 00:56:07,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2024-11-22 00:56:07,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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) [2024-11-22 00:56:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-11-22 00:56:07,778 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 18 [2024-11-22 00:56:07,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:07,778 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-11-22 00:56:07,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:07,779 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-11-22 00:56:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-22 00:56:07,779 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:07,779 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:07,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 00:56:07,780 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:07,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:07,781 INFO L85 PathProgramCache]: Analyzing trace with hash -161196650, now seen corresponding path program 1 times [2024-11-22 00:56:07,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:07,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641436657] [2024-11-22 00:56:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:07,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 00:56:07,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641436657] [2024-11-22 00:56:07,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641436657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 00:56:07,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 00:56:07,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 00:56:07,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143785905] [2024-11-22 00:56:07,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 00:56:07,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 00:56:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 00:56:07,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 00:56:07,932 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:08,016 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2024-11-22 00:56:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 00:56:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-11-22 00:56:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:08,020 INFO L225 Difference]: With dead ends: 59 [2024-11-22 00:56:08,020 INFO L226 Difference]: Without dead ends: 57 [2024-11-22 00:56:08,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-22 00:56:08,021 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:08,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 103 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 00:56:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-22 00:56:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2024-11-22 00:56:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 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) [2024-11-22 00:56:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2024-11-22 00:56:08,033 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 23 [2024-11-22 00:56:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:08,033 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2024-11-22 00:56:08,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2024-11-22 00:56:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-22 00:56:08,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:08,035 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:08,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 00:56:08,036 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:08,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash -632624117, now seen corresponding path program 1 times [2024-11-22 00:56:08,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:08,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097695957] [2024-11-22 00:56:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:08,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 00:56:08,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:08,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097695957] [2024-11-22 00:56:08,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097695957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 00:56:08,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 00:56:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 00:56:08,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099210862] [2024-11-22 00:56:08,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 00:56:08,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 00:56:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 00:56:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 00:56:08,149 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:08,184 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2024-11-22 00:56:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 00:56:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-11-22 00:56:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:08,185 INFO L225 Difference]: With dead ends: 58 [2024-11-22 00:56:08,185 INFO L226 Difference]: Without dead ends: 45 [2024-11-22 00:56:08,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 00:56:08,187 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:08,188 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 82 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 00:56:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-22 00:56:08,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-11-22 00:56:08,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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) [2024-11-22 00:56:08,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2024-11-22 00:56:08,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 27 [2024-11-22 00:56:08,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:08,198 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2024-11-22 00:56:08,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2024-11-22 00:56:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-22 00:56:08,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:08,201 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:08,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 00:56:08,201 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:08,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:08,203 INFO L85 PathProgramCache]: Analyzing trace with hash -170012453, now seen corresponding path program 1 times [2024-11-22 00:56:08,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:08,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824666667] [2024-11-22 00:56:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 00:56:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824666667] [2024-11-22 00:56:08,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824666667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 00:56:08,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887339533] [2024-11-22 00:56:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:08,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:08,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 00:56:08,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 00:56:08,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 00:56:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:08,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 00:56:08,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 00:56:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 00:56:08,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 00:56:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 00:56:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887339533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 00:56:08,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 00:56:08,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-22 00:56:08,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228225470] [2024-11-22 00:56:08,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 00:56:08,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 00:56:08,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 00:56:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-22 00:56:08,583 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 00:56:08,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:08,644 INFO L93 Difference]: Finished difference Result 94 states and 123 transitions. [2024-11-22 00:56:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 00:56:08,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-22 00:56:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:08,645 INFO L225 Difference]: With dead ends: 94 [2024-11-22 00:56:08,645 INFO L226 Difference]: Without dead ends: 61 [2024-11-22 00:56:08,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-22 00:56:08,646 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:08,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 156 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 00:56:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-22 00:56:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2024-11-22 00:56:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 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) [2024-11-22 00:56:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2024-11-22 00:56:08,683 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 30 [2024-11-22 00:56:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:08,683 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2024-11-22 00:56:08,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-22 00:56:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2024-11-22 00:56:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-22 00:56:08,685 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:08,685 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:08,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 00:56:08,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:08,886 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:08,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash 276326491, now seen corresponding path program 2 times [2024-11-22 00:56:08,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:08,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596805681] [2024-11-22 00:56:08,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 00:56:08,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:08,911 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 00:56:08,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 00:56:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 00:56:09,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:09,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596805681] [2024-11-22 00:56:09,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596805681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 00:56:09,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 00:56:09,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 00:56:09,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183972398] [2024-11-22 00:56:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 00:56:09,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 00:56:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 00:56:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 00:56:09,071 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:09,121 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2024-11-22 00:56:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 00:56:09,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-11-22 00:56:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:09,127 INFO L225 Difference]: With dead ends: 88 [2024-11-22 00:56:09,127 INFO L226 Difference]: Without dead ends: 70 [2024-11-22 00:56:09,127 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 00:56:09,129 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:09,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 203 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 00:56:09,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-22 00:56:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-11-22 00:56:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.3114754098360655) internal successors, (80), 62 states have internal predecessors, (80), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-22 00:56:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2024-11-22 00:56:09,144 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 40 [2024-11-22 00:56:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:09,144 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2024-11-22 00:56:09,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2024-11-22 00:56:09,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-22 00:56:09,146 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:09,146 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:09,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 00:56:09,146 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:09,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash -998257721, now seen corresponding path program 1 times [2024-11-22 00:56:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:09,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625740236] [2024-11-22 00:56:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:09,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 00:56:09,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625740236] [2024-11-22 00:56:09,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625740236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 00:56:09,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465897957] [2024-11-22 00:56:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:09,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 00:56:09,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 00:56:09,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 00:56:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:09,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 00:56:09,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 00:56:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 00:56:09,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 00:56:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 00:56:09,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465897957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 00:56:09,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 00:56:09,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-22 00:56:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705480001] [2024-11-22 00:56:09,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 00:56:09,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 00:56:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 00:56:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-22 00:56:09,736 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2024-11-22 00:56:09,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:09,805 INFO L93 Difference]: Finished difference Result 100 states and 134 transitions. [2024-11-22 00:56:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 00:56:09,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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 43 [2024-11-22 00:56:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:09,807 INFO L225 Difference]: With dead ends: 100 [2024-11-22 00:56:09,807 INFO L226 Difference]: Without dead ends: 82 [2024-11-22 00:56:09,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-22 00:56:09,808 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 16 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:09,809 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 224 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-22 00:56:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-22 00:56:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2024-11-22 00:56:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 64 states have (on average 1.3125) internal successors, (84), 65 states have internal predecessors, (84), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-22 00:56:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2024-11-22 00:56:09,830 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 43 [2024-11-22 00:56:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:09,831 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2024-11-22 00:56:09,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 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) [2024-11-22 00:56:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2024-11-22 00:56:09,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-22 00:56:09,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:09,836 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-22 00:56:09,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 00:56:10,037 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,SelfDestructingSolverStorable6 [2024-11-22 00:56:10,038 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:10,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:10,039 INFO L85 PathProgramCache]: Analyzing trace with hash -330653477, now seen corresponding path program 2 times [2024-11-22 00:56:10,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:10,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218393266] [2024-11-22 00:56:10,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 00:56:10,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:10,073 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 00:56:10,074 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 00:56:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 00:56:10,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:10,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218393266] [2024-11-22 00:56:10,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218393266] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 00:56:10,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 00:56:10,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-22 00:56:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524626776] [2024-11-22 00:56:10,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 00:56:10,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 00:56:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:10,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 00:56:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-22 00:56:10,756 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:11,265 INFO L93 Difference]: Finished difference Result 163 states and 231 transitions. [2024-11-22 00:56:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 00:56:11,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-11-22 00:56:11,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:11,266 INFO L225 Difference]: With dead ends: 163 [2024-11-22 00:56:11,267 INFO L226 Difference]: Without dead ends: 146 [2024-11-22 00:56:11,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-22 00:56:11,267 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 74 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:11,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 430 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-22 00:56:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-22 00:56:11,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2024-11-22 00:56:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.3125) internal successors, (105), 81 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-22 00:56:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 120 transitions. [2024-11-22 00:56:11,303 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 120 transitions. Word has length 46 [2024-11-22 00:56:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:11,304 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 120 transitions. [2024-11-22 00:56:11,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 120 transitions. [2024-11-22 00:56:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-22 00:56:11,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:11,305 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-22 00:56:11,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 00:56:11,305 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:11,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash 733212027, now seen corresponding path program 1 times [2024-11-22 00:56:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:11,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688758905] [2024-11-22 00:56:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:11,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 00:56:11,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:11,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688758905] [2024-11-22 00:56:11,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688758905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 00:56:11,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156795695] [2024-11-22 00:56:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 00:56:11,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:11,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 00:56:11,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 00:56:11,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 00:56:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 00:56:11,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 00:56:11,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 00:56:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 00:56:11,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 00:56:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 00:56:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156795695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 00:56:11,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 00:56:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-11-22 00:56:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635594362] [2024-11-22 00:56:11,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 00:56:11,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 00:56:11,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 00:56:11,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-22 00:56:11,830 INFO L87 Difference]: Start difference. First operand 88 states and 120 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:11,886 INFO L93 Difference]: Finished difference Result 137 states and 188 transitions. [2024-11-22 00:56:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 00:56:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2024-11-22 00:56:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:11,889 INFO L225 Difference]: With dead ends: 137 [2024-11-22 00:56:11,889 INFO L226 Difference]: Without dead ends: 104 [2024-11-22 00:56:11,889 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-22 00:56:11,889 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:11,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 354 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-22 00:56:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-22 00:56:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2024-11-22 00:56:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 84 states have internal predecessors, (109), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-22 00:56:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 124 transitions. [2024-11-22 00:56:11,908 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 124 transitions. Word has length 47 [2024-11-22 00:56:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:11,908 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 124 transitions. [2024-11-22 00:56:11,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-22 00:56:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 124 transitions. [2024-11-22 00:56:11,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-22 00:56:11,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:11,911 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:11,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 00:56:12,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:12,116 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:12,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:12,116 INFO L85 PathProgramCache]: Analyzing trace with hash 421927055, now seen corresponding path program 2 times [2024-11-22 00:56:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:12,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34485279] [2024-11-22 00:56:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 00:56:12,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:12,172 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 00:56:12,172 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 00:56:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 00:56:13,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:13,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34485279] [2024-11-22 00:56:13,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34485279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 00:56:13,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134722308] [2024-11-22 00:56:13,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 00:56:13,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 00:56:13,475 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 00:56:13,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 00:56:13,599 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 00:56:13,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 00:56:13,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-22 00:56:13,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 00:56:13,638 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 [2024-11-22 00:56:13,687 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 00:56:13,687 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 19 treesize of output 16 [2024-11-22 00:56:13,732 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 00:56:13,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-22 00:56:13,823 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 00:56:13,823 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 [2024-11-22 00:56:13,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 00:56:13,996 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 43 treesize of output 27 [2024-11-22 00:56:14,009 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 18 treesize of output 7 [2024-11-22 00:56:14,058 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 19 treesize of output 18 [2024-11-22 00:56:14,073 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-11-22 00:56:14,074 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 36 [2024-11-22 00:56:14,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 00:56:14,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 00:56:14,258 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 77 treesize of output 49 [2024-11-22 00:56:14,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 00:56:14,383 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 00:56:14,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 22 [2024-11-22 00:56:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 00:56:14,387 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 00:56:14,824 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 114 treesize of output 106 [2024-11-22 00:56:14,832 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 66 treesize of output 58 [2024-11-22 00:56:14,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 00:56:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 00:56:15,015 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 470 treesize of output 458 [2024-11-22 00:56:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 00:56:15,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 00:56:15,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 631 treesize of output 572 [2024-11-22 00:56:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-22 00:56:17,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134722308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 00:56:17,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 00:56:17,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2024-11-22 00:56:17,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360238613] [2024-11-22 00:56:17,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 00:56:17,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-22 00:56:17,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 00:56:17,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-22 00:56:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 00:56:17,211 INFO L87 Difference]: Start difference. First operand 91 states and 124 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 00:56:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-22 00:56:18,465 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2024-11-22 00:56:18,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 00:56:18,466 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2024-11-22 00:56:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-22 00:56:18,468 INFO L225 Difference]: With dead ends: 182 [2024-11-22 00:56:18,472 INFO L226 Difference]: Without dead ends: 151 [2024-11-22 00:56:18,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=220, Invalid=2036, Unknown=0, NotChecked=0, Total=2256 [2024-11-22 00:56:18,477 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 112 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-22 00:56:18,477 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1032 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-22 00:56:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-22 00:56:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 92. [2024-11-22 00:56:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 85 states have internal predecessors, (110), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2024-11-22 00:56:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2024-11-22 00:56:18,507 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 50 [2024-11-22 00:56:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-22 00:56:18,508 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2024-11-22 00:56:18,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 35 states have internal predecessors, (80), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-22 00:56:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2024-11-22 00:56:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-22 00:56:18,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-22 00:56:18,509 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 00:56:18,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 00:56:18,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:18,710 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-22 00:56:18,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 00:56:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1706595257, now seen corresponding path program 3 times [2024-11-22 00:56:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 00:56:18,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116813309] [2024-11-22 00:56:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 00:56:18,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 00:56:18,761 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 00:56:18,762 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 00:56:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 00:56:20,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 00:56:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116813309] [2024-11-22 00:56:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116813309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 00:56:20,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027103687] [2024-11-22 00:56:20,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 00:56:20,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 00:56:20,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 00:56:20,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 00:56:20,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 00:56:20,241 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 00:56:20,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 00:56:20,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-11-22 00:56:20,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 00:56:20,261 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 [2024-11-22 00:56:20,295 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 00:56:20,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-22 00:56:20,393 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-22 00:56:20,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2024-11-22 00:56:20,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 00:56:20,547 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-22 00:56:20,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-22 00:56:20,623 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 [2024-11-22 00:56:20,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2024-11-22 00:56:20,780 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 30 treesize of output 22 [2024-11-22 00:56:20,798 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2024-11-22 00:56:20,799 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 79 treesize of output 49 [2024-11-22 00:56:20,866 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2024-11-22 00:56:20,890 INFO L349 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2024-11-22 00:56:20,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 61 [2024-11-22 00:56:20,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 00:56:20,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-22 00:56:21,120 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 140 treesize of output 92 [2024-11-22 00:56:21,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2024-11-22 00:56:21,428 INFO L349 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2024-11-22 00:56:21,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 37 [2024-11-22 00:56:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 00:56:21,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 00:56:22,147 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 436 treesize of output 404 [2024-11-22 00:56:22,151 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 540 treesize of output 476 [2024-11-22 00:57:06,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 00:57:06,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 93485 treesize of output 90057